2007-09-15 10:38:47 +00:00
|
|
|
Kernel Parameters
|
|
|
|
~~~~~~~~~~~~~~~~~
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
The following is a consolidated list of the kernel parameters as implemented
|
|
|
|
(mostly) by the __setup() macro and sorted into English Dictionary order
|
|
|
|
(defined as ignoring all punctuation and sorting digits before letters in a
|
|
|
|
case insensitive manner), and with descriptions where known.
|
|
|
|
|
|
|
|
Module parameters for loadable modules are specified only as the
|
|
|
|
parameter name with optional '=' and value as appropriate, such as:
|
|
|
|
|
|
|
|
modprobe usbcore blinkenlights=1
|
|
|
|
|
|
|
|
Module parameters for modules that are built into the kernel image
|
|
|
|
are specified on the kernel command line with the module name plus
|
|
|
|
'.' plus parameter name, with '=' and value if appropriate, such as:
|
|
|
|
|
|
|
|
usbcore.blinkenlights=1
|
|
|
|
|
2009-05-06 23:02:58 +00:00
|
|
|
Hyphens (dashes) and underscores are equivalent in parameter names, so
|
|
|
|
log_buf_len=1M print-fatal-signals=1
|
|
|
|
can also be entered as
|
|
|
|
log-buf-len=1M print_fatal_signals=1
|
|
|
|
|
|
|
|
|
2006-03-31 23:43:18 +00:00
|
|
|
This document may not be entirely up to date and comprehensive. The command
|
|
|
|
"modinfo -p ${modulename}" shows a current list of all parameters of a loadable
|
|
|
|
module. Loadable modules, after being loaded into the running kernel, also
|
|
|
|
reveal their parameters in /sys/module/${modulename}/parameters/. Some of these
|
|
|
|
parameters may be changed at runtime by the command
|
|
|
|
"echo -n ${value} > /sys/module/${modulename}/parameters/${parm}".
|
|
|
|
|
2006-03-31 23:44:30 +00:00
|
|
|
The parameters listed below are only valid if certain kernel build options were
|
|
|
|
enabled and if respective hardware is present. The text in square brackets at
|
|
|
|
the beginning of each description states the restrictions within which a
|
|
|
|
parameter is applicable:
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
ACPI ACPI support is enabled.
|
2007-07-27 00:46:20 +00:00
|
|
|
AGP AGP (Accelerated Graphics Port) is enabled.
|
2005-04-16 22:20:36 +00:00
|
|
|
ALSA ALSA sound support is enabled.
|
|
|
|
APIC APIC support is enabled.
|
|
|
|
APM Advanced Power Management support is enabled.
|
2011-08-13 19:34:52 +00:00
|
|
|
ARM ARM architecture is enabled.
|
2007-10-10 12:58:29 +00:00
|
|
|
AVR32 AVR32 architecture is enabled.
|
2005-04-16 22:20:36 +00:00
|
|
|
AX25 Appropriate AX.25 support is enabled.
|
2007-10-09 09:24:49 +00:00
|
|
|
BLACKFIN Blackfin architecture is enabled.
|
2011-01-25 14:18:38 +00:00
|
|
|
DRM Direct Rendering Management support is enabled.
|
|
|
|
DYNAMIC_DEBUG Build in debug messages and enable them at runtime
|
2005-04-16 22:20:36 +00:00
|
|
|
EDD BIOS Enhanced Disk Drive Services (EDD) is enabled
|
|
|
|
EFI EFI Partitioning (GPT) is enabled
|
|
|
|
EIDE EIDE/ATAPI support is enabled.
|
2011-05-12 22:33:20 +00:00
|
|
|
EVM Extended Verification Module
|
2005-04-16 22:20:36 +00:00
|
|
|
FB The frame buffer device is enabled.
|
2011-08-13 19:34:52 +00:00
|
|
|
FTRACE Function tracing enabled.
|
2009-06-17 23:28:08 +00:00
|
|
|
GCOV GCOV profiling is enabled.
|
2005-04-16 22:20:36 +00:00
|
|
|
HW Appropriate hardware is enabled.
|
|
|
|
IA-64 IA-64 architecture is enabled.
|
2009-02-04 14:06:57 +00:00
|
|
|
IMA Integrity measurement architecture is enabled.
|
2005-04-16 22:20:36 +00:00
|
|
|
IOSCHED More than one I/O scheduler is enabled.
|
2005-07-12 20:58:33 +00:00
|
|
|
IP_PNP IP DHCP, BOOTP, or RARP is enabled.
|
2010-02-04 21:36:50 +00:00
|
|
|
IPV6 IPv6 support is enabled.
|
2005-04-16 22:20:36 +00:00
|
|
|
ISAPNP ISA PnP code is enabled.
|
|
|
|
ISDN Appropriate ISDN support is enabled.
|
|
|
|
JOY Appropriate joystick support is enabled.
|
2010-05-21 02:04:24 +00:00
|
|
|
KGDB Kernel debugger support is enabled.
|
2009-07-10 12:20:35 +00:00
|
|
|
KVM Kernel Virtual Machine support is enabled.
|
2006-09-28 18:29:01 +00:00
|
|
|
LIBATA Libata driver is enabled
|
2005-04-16 22:20:36 +00:00
|
|
|
LP Printer support is enabled.
|
|
|
|
LOOP Loopback device support is enabled.
|
|
|
|
M68k M68k architecture is enabled.
|
|
|
|
These options have more detailed description inside of
|
|
|
|
Documentation/m68k/kernel-options.txt.
|
|
|
|
MCA MCA bus support is enabled.
|
|
|
|
MDA MDA console support is enabled.
|
2011-08-13 19:34:52 +00:00
|
|
|
MIPS MIPS architecture is enabled.
|
2005-04-16 22:20:36 +00:00
|
|
|
MOUSE Appropriate mouse support is enabled.
|
2006-03-06 05:33:34 +00:00
|
|
|
MSI Message Signaled Interrupts (PCI).
|
2007-07-31 07:37:40 +00:00
|
|
|
MTD MTD (Memory Technology Device) support is enabled.
|
2005-04-16 22:20:36 +00:00
|
|
|
NET Appropriate network support is enabled.
|
|
|
|
NUMA NUMA support is enabled.
|
|
|
|
NFS Appropriate NFS support is enabled.
|
|
|
|
OSS OSS sound support is enabled.
|
2007-07-31 07:37:40 +00:00
|
|
|
PV_OPS A paravirtualized kernel is enabled.
|
|
|
|
PARIDE The ParIDE (parallel port IDE) subsystem is enabled.
|
2005-04-16 22:20:36 +00:00
|
|
|
PARISC The PA-RISC architecture is enabled.
|
|
|
|
PCI PCI bus support is enabled.
|
2007-10-05 20:17:58 +00:00
|
|
|
PCIE PCI Express support is enabled.
|
2005-04-16 22:20:36 +00:00
|
|
|
PCMCIA The PCMCIA subsystem is enabled.
|
|
|
|
PNP Plug & Play support is enabled.
|
|
|
|
PPC PowerPC architecture is enabled.
|
|
|
|
PPT Parallel port support is enabled.
|
|
|
|
PS2 Appropriate PS/2 support is enabled.
|
|
|
|
RAM RAM disk support is enabled.
|
|
|
|
S390 S390 architecture is enabled.
|
|
|
|
SCSI Appropriate SCSI support is enabled.
|
2010-08-14 19:36:14 +00:00
|
|
|
A lot of drivers have their options described inside
|
|
|
|
the Documentation/scsi/ sub-directory.
|
2007-10-17 06:31:32 +00:00
|
|
|
SECURITY Different security models are enabled.
|
2005-04-16 22:20:36 +00:00
|
|
|
SELINUX SELinux support is enabled.
|
2010-07-29 21:48:09 +00:00
|
|
|
APPARMOR AppArmor support is enabled.
|
2005-04-16 22:20:36 +00:00
|
|
|
SERIAL Serial support is enabled.
|
2007-02-28 09:30:01 +00:00
|
|
|
SH SuperH architecture is enabled.
|
2005-04-16 22:20:36 +00:00
|
|
|
SMP The kernel is an SMP kernel.
|
|
|
|
SPARC Sparc architecture is enabled.
|
2008-07-24 04:28:33 +00:00
|
|
|
SWSUSP Software suspend (hibernation) is enabled.
|
|
|
|
SUSPEND System suspend states are enabled.
|
2010-03-25 03:55:32 +00:00
|
|
|
TPM TPM drivers are enabled.
|
2005-04-16 22:20:36 +00:00
|
|
|
TS Appropriate touchscreen support is enabled.
|
2008-11-10 19:07:45 +00:00
|
|
|
UMS USB Mass Storage support is enabled.
|
2005-04-16 22:20:36 +00:00
|
|
|
USB USB support is enabled.
|
|
|
|
USBHID USB Human Interface Device support is enabled.
|
|
|
|
V4L Video For Linux support is enabled.
|
|
|
|
VGA The VGA console has been enabled.
|
|
|
|
VT Virtual terminal support is enabled.
|
|
|
|
WDT Watchdog support is enabled.
|
|
|
|
XT IBM PC/XT MFM hard disk support is enabled.
|
2007-07-31 07:37:59 +00:00
|
|
|
X86-32 X86-32, aka i386 architecture is enabled.
|
2005-04-16 22:20:36 +00:00
|
|
|
X86-64 X86-64 architecture is enabled.
|
|
|
|
More X86-64 boot options can be found in
|
2008-10-20 16:32:21 +00:00
|
|
|
Documentation/x86/x86_64/boot-options.txt .
|
2011-08-13 19:34:52 +00:00
|
|
|
X86 Either 32-bit or 64-bit x86 (same as X86-32+X86-64)
|
2010-05-14 11:44:30 +00:00
|
|
|
XEN Xen support is enabled
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
In addition, the following text indicates that the option:
|
|
|
|
|
|
|
|
BUGS= Relates to possible processor bugs on the said processor.
|
|
|
|
KNL Is a kernel start-up parameter.
|
|
|
|
BOOT Is a boot loader parameter.
|
|
|
|
|
|
|
|
Parameters denoted with BOOT are actually interpreted by the boot
|
|
|
|
loader, and have no meaning to the kernel directly.
|
|
|
|
Do not modify the syntax of boot loader parameters without extreme
|
2009-02-19 21:48:14 +00:00
|
|
|
need or coordination with <Documentation/x86/boot.txt>.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-02-13 12:26:21 +00:00
|
|
|
There are also arch-specific kernel-parameters not documented here.
|
2008-10-20 16:32:21 +00:00
|
|
|
See for example <Documentation/x86/x86_64/boot-options.txt>.
|
2007-02-13 12:26:21 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
Note that ALL kernel parameters listed below are CASE SENSITIVE, and that
|
|
|
|
a trailing = on the name of any parameter states that that parameter will
|
|
|
|
be entered as an environment variable, whereas its absence indicates that
|
|
|
|
it will appear as a kernel argument readable via /proc/cmdline by programs
|
|
|
|
running once the system is up.
|
|
|
|
|
2006-09-29 09:00:27 +00:00
|
|
|
The number of kernel parameters is not limited, but the length of the
|
|
|
|
complete command line (parameters including spaces etc.) is limited to
|
|
|
|
a fixed number of characters. This limit depends on the architecture
|
|
|
|
and is between 256 and 4096 characters. It is defined in the file
|
|
|
|
./include/asm/setup.h as COMMAND_LINE_SIZE.
|
|
|
|
|
2011-02-21 04:08:35 +00:00
|
|
|
Finally, the [KMG] suffix is commonly described after a number of kernel
|
|
|
|
parameter values. These 'K', 'M', and 'G' letters represent the _binary_
|
|
|
|
multipliers 'Kilo', 'Mega', and 'Giga', equalling 2^10, 2^20, and 2^30
|
|
|
|
bytes respectively. Such letter suffixes can also be entirely omitted.
|
|
|
|
|
2006-09-29 09:00:27 +00:00
|
|
|
|
2009-04-14 08:33:43 +00:00
|
|
|
acpi= [HW,ACPI,X86]
|
2007-03-06 10:29:44 +00:00
|
|
|
Advanced Configuration and Power Interface
|
2010-02-19 05:09:22 +00:00
|
|
|
Format: { force | off | strict | noirq | rsdt }
|
2005-04-16 22:20:36 +00:00
|
|
|
force -- enable ACPI if default was off
|
|
|
|
off -- disable ACPI if default was on
|
|
|
|
noirq -- do not use ACPI for IRQ routing
|
2005-10-23 19:57:11 +00:00
|
|
|
strict -- Be less tolerant of platforms that are not
|
2005-04-16 22:20:36 +00:00
|
|
|
strictly ACPI specification compliant.
|
2008-12-17 08:55:18 +00:00
|
|
|
rsdt -- prefer RSDT over (default) XSDT
|
2010-04-08 06:34:27 +00:00
|
|
|
copy_dsdt -- copy DSDT to memory
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2011-08-15 00:02:26 +00:00
|
|
|
See also Documentation/power/runtime_pm.txt, pci=noacpi
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2011-07-14 22:05:21 +00:00
|
|
|
acpi_rsdp= [ACPI,EFI,KEXEC]
|
|
|
|
Pass the RSDP address to the kernel, mostly used
|
|
|
|
on machines running EFI runtime service to boot the
|
|
|
|
second kernel for kdump.
|
|
|
|
|
2007-03-11 07:26:14 +00:00
|
|
|
acpi_apic_instance= [ACPI, IOAPIC]
|
|
|
|
Format: <int>
|
|
|
|
2: use 2nd APIC table, if available
|
|
|
|
1,0: use 1st APIC table
|
2007-03-30 18:16:10 +00:00
|
|
|
default: 0
|
2007-03-11 07:26:14 +00:00
|
|
|
|
2008-08-01 15:37:55 +00:00
|
|
|
acpi_backlight= [HW,ACPI]
|
|
|
|
acpi_backlight=vendor
|
|
|
|
acpi_backlight=video
|
|
|
|
If set to vendor, prefer vendor specific driver
|
|
|
|
(e.g. thinkpad_acpi, sony_acpi, etc.) instead
|
|
|
|
of the ACPI video.ko driver.
|
|
|
|
|
2008-11-07 23:58:05 +00:00
|
|
|
acpi.debug_layer= [HW,ACPI,ACPI_DEBUG]
|
|
|
|
acpi.debug_level= [HW,ACPI,ACPI_DEBUG]
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: <int>
|
2008-11-07 23:58:05 +00:00
|
|
|
CONFIG_ACPI_DEBUG must be enabled to produce any ACPI
|
|
|
|
debug output. Bits in debug_layer correspond to a
|
|
|
|
_COMPONENT in an ACPI source file, e.g.,
|
|
|
|
#define _COMPONENT ACPI_PCI_COMPONENT
|
|
|
|
Bits in debug_level correspond to a level in
|
|
|
|
ACPI_DEBUG_PRINT statements, e.g.,
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, ...
|
2008-11-13 23:30:13 +00:00
|
|
|
The debug_level mask defaults to "info". See
|
|
|
|
Documentation/acpi/debug.txt for more information about
|
|
|
|
debug layers and levels.
|
2008-11-07 23:58:05 +00:00
|
|
|
|
2008-11-13 23:30:13 +00:00
|
|
|
Enable processor driver info messages:
|
|
|
|
acpi.debug_layer=0x20000000
|
|
|
|
Enable PCI/PCI interrupt routing info messages:
|
|
|
|
acpi.debug_layer=0x400000
|
2008-11-07 23:58:05 +00:00
|
|
|
Enable AML "Debug" output, i.e., stores to the Debug
|
|
|
|
object while interpreting AML:
|
|
|
|
acpi.debug_layer=0xffffffff acpi.debug_level=0x2
|
|
|
|
Enable all messages related to ACPI hardware:
|
|
|
|
acpi.debug_layer=0x2 acpi.debug_level=0xffffffff
|
|
|
|
|
|
|
|
Some values produce so much output that the system is
|
|
|
|
unusable. The "log_buf_len" parameter may be useful
|
|
|
|
if you need to capture more output.
|
2007-04-24 05:53:22 +00:00
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
acpi_irq_balance [HW,ACPI]
|
|
|
|
ACPI will balance active IRQs
|
|
|
|
default in APIC mode
|
|
|
|
|
|
|
|
acpi_irq_nobalance [HW,ACPI]
|
|
|
|
ACPI will not move active IRQs (default)
|
|
|
|
default in PIC mode
|
|
|
|
|
|
|
|
acpi_irq_isa= [HW,ACPI] If irq_balance, mark listed IRQs used by ISA
|
|
|
|
Format: <irq>,<irq>...
|
|
|
|
|
|
|
|
acpi_irq_pci= [HW,ACPI] If irq_balance, clear listed IRQs for
|
|
|
|
use by PCI
|
|
|
|
Format: <irq>,<irq>...
|
|
|
|
|
|
|
|
acpi_no_auto_ssdt [HW,ACPI] Disable automatic loading of SSDT
|
|
|
|
|
|
|
|
acpi_os_name= [HW,ACPI] Tell ACPI BIOS the name of the OS
|
|
|
|
Format: To spoof as Windows 98: ="Microsoft Windows"
|
|
|
|
|
|
|
|
acpi_osi= [HW,ACPI] Modify list of supported OS interface strings
|
|
|
|
acpi_osi="string1" # add string1 -- only one string
|
|
|
|
acpi_osi="!string2" # remove built-in string2
|
|
|
|
acpi_osi= # disable all strings
|
|
|
|
|
2009-04-14 08:33:43 +00:00
|
|
|
acpi_pm_good [X86]
|
2009-04-05 22:55:22 +00:00
|
|
|
Override the pmtimer bug detection: force the kernel
|
|
|
|
to assume that this machine's pmtimer latches its value
|
|
|
|
and always returns good values.
|
|
|
|
|
2009-04-18 01:30:28 +00:00
|
|
|
acpi_sci= [HW,ACPI] ACPI System Control Interrupt trigger mode
|
|
|
|
Format: { level | edge | high | low }
|
|
|
|
|
|
|
|
acpi_serialize [HW,ACPI] force serialization of AML methods
|
|
|
|
|
|
|
|
acpi_skip_timer_override [HW,ACPI]
|
|
|
|
Recognize and ignore IRQ0/pin2 Interrupt Override.
|
|
|
|
For broken nForce2 BIOS resulting in XT-PIC timer.
|
|
|
|
|
|
|
|
acpi_sleep= [HW,ACPI] Sleep options
|
|
|
|
Format: { s3_bios, s3_mode, s3_beep, s4_nohwsig,
|
2011-05-10 19:09:38 +00:00
|
|
|
old_ordering, nonvs, sci_force_enable }
|
2009-04-18 01:30:28 +00:00
|
|
|
See Documentation/power/video.txt for information on
|
|
|
|
s3_bios and s3_mode.
|
|
|
|
s3_beep is for debugging; it makes the PC's speaker beep
|
|
|
|
as soon as the kernel's real-mode entry point is called.
|
|
|
|
s4_nohwsig prevents ACPI hardware signature from being
|
|
|
|
used during resume from hibernation.
|
|
|
|
old_ordering causes the ACPI 1.0 ordering of the _PTS
|
|
|
|
control method, with respect to putting devices into
|
|
|
|
low power states, to be enforced (the ACPI 2.0 ordering
|
|
|
|
of _PTS is used by default).
|
2010-07-23 20:59:09 +00:00
|
|
|
nonvs prevents the kernel from saving/restoring the
|
|
|
|
ACPI NVS memory during suspend/hibernation and resume.
|
2009-12-30 07:36:42 +00:00
|
|
|
sci_force_enable causes the kernel to set SCI_EN directly
|
|
|
|
on resume from S1/S3 (which is against the ACPI spec,
|
|
|
|
but some broken systems don't work without it).
|
2009-04-18 01:30:28 +00:00
|
|
|
|
|
|
|
acpi_use_timer_override [HW,ACPI]
|
|
|
|
Use timer override. For some broken Nvidia NF5 boards
|
|
|
|
that require a timer override, but don't have HPET
|
|
|
|
|
2009-03-29 22:01:27 +00:00
|
|
|
acpi_enforce_resources= [ACPI]
|
|
|
|
{ strict | lax | no }
|
|
|
|
Check for resource conflicts between native drivers
|
|
|
|
and ACPI OperationRegions (SystemIO and SystemMemory
|
|
|
|
only). IO ports and memory declared in ACPI might be
|
|
|
|
used by the ACPI subsystem in arbitrary AML code and
|
|
|
|
can interfere with legacy drivers.
|
|
|
|
strict (default): access to resources claimed by ACPI
|
|
|
|
is denied; legacy drivers trying to access reserved
|
|
|
|
resources will fail to bind to device using them.
|
|
|
|
lax: access to resources claimed by ACPI is allowed;
|
|
|
|
legacy drivers trying to access reserved resources
|
|
|
|
will bind successfully but a warning message is logged.
|
|
|
|
no: ACPI OperationRegions are not marked as reserved,
|
|
|
|
no further checks are performed.
|
|
|
|
|
2009-04-18 01:30:28 +00:00
|
|
|
add_efi_memmap [EFI; X86] Include EFI memory map in
|
|
|
|
kernel's map of available physical RAM.
|
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
agp= [AGP]
|
|
|
|
{ off | try_unsupported }
|
|
|
|
off: disable AGP support
|
|
|
|
try_unsupported: try to drive unsupported chipsets
|
|
|
|
(may crash computer or cause data corruption)
|
|
|
|
|
2010-06-08 00:10:38 +00:00
|
|
|
ALSA [HW,ALSA]
|
|
|
|
See Documentation/sound/alsa/alsa-parameters.txt
|
|
|
|
|
2010-02-20 16:13:29 +00:00
|
|
|
alignment= [KNL,ARM]
|
|
|
|
Allow the default userspace alignment fault handler
|
|
|
|
behaviour to be specified. Bit 0 enables warnings,
|
|
|
|
bit 1 enables fixups, and bit 2 sends a segfault.
|
|
|
|
|
2011-08-05 13:15:08 +00:00
|
|
|
align_va_addr= [X86-64]
|
|
|
|
Align virtual addresses by clearing slice [14:12] when
|
|
|
|
allocating a VMA at process creation time. This option
|
|
|
|
gives you up to 3% performance improvement on AMD F15h
|
|
|
|
machines (where it is enabled by default) for a
|
|
|
|
CPU-intensive style benchmark, and it can vary highly in
|
|
|
|
a microbenchmark depending on workload and compiler.
|
|
|
|
|
|
|
|
1: only for 32-bit processes
|
|
|
|
2: only for 64-bit processes
|
|
|
|
on: enable for both 32- and 64-bit processes
|
|
|
|
off: disable for both 32- and 64-bit processes
|
|
|
|
|
2008-06-26 19:28:10 +00:00
|
|
|
amd_iommu= [HW,X86-84]
|
|
|
|
Pass parameters to the AMD IOMMU driver in the system.
|
|
|
|
Possible values are:
|
2008-09-19 16:23:30 +00:00
|
|
|
fullflush - enable flushing of IO/TLB entries when
|
|
|
|
they are unmapped. Otherwise they are
|
|
|
|
flushed before they will be reused, which
|
|
|
|
is a lot of faster
|
2010-05-11 15:12:33 +00:00
|
|
|
off - do not initialize any AMD IOMMU found in
|
|
|
|
the system
|
2008-09-19 16:23:30 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
amijoy.map= [HW,JOY] Amiga joystick support
|
|
|
|
Map of devices attached to JOY0DAT and JOY1DAT
|
|
|
|
Format: <a>,<b>
|
2011-08-15 00:02:26 +00:00
|
|
|
See also Documentation/input/joystick.txt
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
analog.map= [HW,JOY] Analog joystick and gamepad support
|
|
|
|
Specifies type or capabilities of an analog joystick
|
|
|
|
connected to one of 16 gameports
|
|
|
|
Format: <type1>,<type2>,..<type16>
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
apc= [HW,SPARC]
|
|
|
|
Power management functions (SPARCstation-4/5 + deriv.)
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: noidle
|
|
|
|
Disable APC CPU standby support. SPARCstation-Fox does
|
|
|
|
not play well with APC CPU idle - disable it if you have
|
|
|
|
APC and your system crashes randomly.
|
|
|
|
|
2009-05-06 23:02:58 +00:00
|
|
|
apic= [APIC,X86-32] Advanced Programmable Interrupt Controller
|
2007-07-31 07:37:40 +00:00
|
|
|
Change the output verbosity whilst booting
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: { quiet (default) | verbose | debug }
|
|
|
|
Change the amount of debugging information output
|
|
|
|
when initialising the APIC and IO-APIC components.
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2010-02-04 21:36:50 +00:00
|
|
|
autoconf= [IPV6]
|
|
|
|
See Documentation/networking/ipv6.txt.
|
|
|
|
|
2009-10-14 15:09:04 +00:00
|
|
|
show_lapic= [APIC,X86] Advanced Programmable Interrupt Controller
|
|
|
|
Limit apic dumping. The parameter defines the maximal
|
|
|
|
number of local apics being dumped. Also it is possible
|
|
|
|
to set it to "all" by meaning -- no limit here.
|
|
|
|
Format: { 1 (default) | 2 | ... | all }.
|
|
|
|
The parameter valid if only apic=debug or
|
|
|
|
apic=verbose is specified.
|
|
|
|
Example: apic=debug show_lapic=all
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
apm= [APM] Advanced Power Management
|
2008-07-04 16:59:43 +00:00
|
|
|
See header of arch/x86/kernel/apm_32.c.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
arcrimi= [HW,NET] ARCnet - "RIM I" (entirely mem-mapped) cards
|
|
|
|
Format: <io>,<irq>,<nodeID>
|
|
|
|
|
|
|
|
ataflop= [HW,M68k]
|
|
|
|
|
|
|
|
atarimouse= [HW,MOUSE] Atari Mouse
|
|
|
|
|
|
|
|
atkbd.extra= [HW] Enable extra LEDs and keys on IBM RapidAccess,
|
|
|
|
EzKey and similar keyboards
|
|
|
|
|
|
|
|
atkbd.reset= [HW] Reset keyboard during initialization
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
atkbd.set= [HW] Select keyboard code set
|
|
|
|
Format: <int> (2 = AT (default), 3 = PS/2)
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
atkbd.scroll= [HW] Enable scroll wheel on MS Office and similar
|
|
|
|
keyboards
|
|
|
|
|
|
|
|
atkbd.softraw= [HW] Choose between synthetic and real raw mode
|
|
|
|
Format: <bool> (0 = real, 1 = synthetic (default))
|
2005-10-23 19:57:11 +00:00
|
|
|
|
|
|
|
atkbd.softrepeat= [HW]
|
|
|
|
Use software keyboard repeat
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2011-08-13 19:34:52 +00:00
|
|
|
autotest [IA-64]
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
baycom_epp= [HW,AX25]
|
|
|
|
Format: <io>,<mode>
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
baycom_par= [HW,AX25] BayCom Parallel Port AX.25 Modem
|
|
|
|
Format: <io>,<mode>
|
|
|
|
See header of drivers/net/hamradio/baycom_par.c.
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
baycom_ser_fdx= [HW,AX25]
|
|
|
|
BayCom Serial Port AX.25 Modem (Full Duplex Mode)
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: <io>,<irq>,<mode>[,<baud>]
|
|
|
|
See header of drivers/net/hamradio/baycom_ser_fdx.c.
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
baycom_ser_hdx= [HW,AX25]
|
|
|
|
BayCom Serial Port AX.25 Modem (Half Duplex Mode)
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: <io>,<irq>,<mode>
|
|
|
|
See header of drivers/net/hamradio/baycom_ser_hdx.c.
|
|
|
|
|
2007-10-16 08:23:46 +00:00
|
|
|
boot_delay= Milliseconds to delay each printk during boot.
|
|
|
|
Values larger than 10 seconds (10000) are changed to
|
|
|
|
no delay (0).
|
|
|
|
Format: integer
|
|
|
|
|
2008-08-20 21:08:58 +00:00
|
|
|
bootmem_debug [KNL] Enable bootmem allocator debug messages.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
bttv.card= [HW,V4L] bttv (bt848 + bt878 based grabber cards)
|
2005-10-23 19:57:11 +00:00
|
|
|
bttv.radio= Most important insmod options are available as
|
|
|
|
kernel args too.
|
2005-04-16 22:20:36 +00:00
|
|
|
bttv.pll= See Documentation/video4linux/bttv/Insmod-options
|
2011-08-15 00:02:26 +00:00
|
|
|
bttv.tuner=
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2010-09-28 15:33:12 +00:00
|
|
|
bulk_remove=off [PPC] This parameter disables the use of the pSeries
|
|
|
|
firmware feature for flushing multiple hpte entries
|
|
|
|
at a time.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
c101= [NET] Moxa C101 synchronous serial card
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
cachesize= [BUGS=X86-32] Override level 2 CPU cache size detection.
|
2005-04-16 22:20:36 +00:00
|
|
|
Sometimes CPU hardware bugs make them report the cache
|
|
|
|
size incorrectly. The kernel will attempt work arounds
|
|
|
|
to fix known problems, but for some CPUs it is not
|
|
|
|
possible to determine what the correct size should be.
|
|
|
|
This option provides an override for these situations.
|
|
|
|
|
2007-10-17 06:31:32 +00:00
|
|
|
capability.disable=
|
|
|
|
[SECURITY] Disable capabilities. This would normally
|
|
|
|
be used only if an alternative security model is to be
|
|
|
|
configured. Potentially dangerous and should only be
|
|
|
|
used if you are entirely sure of the consequences.
|
|
|
|
|
2008-01-26 13:10:37 +00:00
|
|
|
ccw_timeout_log [S390]
|
|
|
|
See Documentation/s390/CommonIO for details.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-04-04 21:29:57 +00:00
|
|
|
cgroup_disable= [KNL] Disable a particular controller
|
|
|
|
Format: {name of the controller(s) to disable}
|
|
|
|
{Currently supported controllers - "memory"}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
checkreqprot [SELINUX] Set initial checkreqprot flag value.
|
|
|
|
Format: { "0" | "1" }
|
|
|
|
See security/selinux/Kconfig help text.
|
2005-10-23 19:57:11 +00:00
|
|
|
0 -- check protection applied by kernel (includes
|
|
|
|
any implied execute protection).
|
2005-04-16 22:20:36 +00:00
|
|
|
1 -- check protection requested by application.
|
|
|
|
Default value is set via a kernel config option.
|
2005-10-23 19:57:11 +00:00
|
|
|
Value can be changed at runtime via
|
|
|
|
/selinux/checkreqprot.
|
|
|
|
|
2008-01-26 13:10:36 +00:00
|
|
|
cio_ignore= [S390]
|
|
|
|
See Documentation/s390/CommonIO for details.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
clock= [BUGS=X86-32, HW] gettimeofday clocksource override.
|
2006-06-26 07:25:05 +00:00
|
|
|
[Deprecated]
|
2006-10-03 20:45:33 +00:00
|
|
|
Forces specified clocksource (if available) to be used
|
2006-06-26 07:25:05 +00:00
|
|
|
when calculating gettimeofday(). If specified
|
2006-10-03 20:45:33 +00:00
|
|
|
clocksource is not available, it defaults to PIT.
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: { pit | tsc | cyclone | pmtmr }
|
|
|
|
|
2010-07-14 00:56:20 +00:00
|
|
|
clocksource= Override the default clocksource
|
2007-05-23 20:58:16 +00:00
|
|
|
Format: <string>
|
|
|
|
Override the default clocksource and use the clocksource
|
|
|
|
with the name specified.
|
|
|
|
Some clocksource names to choose from, depending on
|
|
|
|
the platform:
|
|
|
|
[all] jiffies (this is the base, fallback clocksource)
|
|
|
|
[ACPI] acpi_pm
|
|
|
|
[ARM] imx_timer1,OSTS,netx_timer,mpu_timer2,
|
|
|
|
pxa_timer,timer3,32k_counter,timer0_1
|
|
|
|
[AVR32] avr32
|
2010-08-23 21:49:11 +00:00
|
|
|
[X86-32] pit,hpet,tsc;
|
2007-05-23 20:58:16 +00:00
|
|
|
scx200_hrt on Geode; cyclone on IBM x440
|
|
|
|
[MIPS] MIPS
|
|
|
|
[PARISC] cr16
|
|
|
|
[S390] tod
|
|
|
|
[SH] SuperH
|
|
|
|
[SPARC64] tick
|
|
|
|
[X86-64] hpet,tsc
|
|
|
|
|
2008-01-30 12:33:21 +00:00
|
|
|
clearcpuid=BITNUM [X86]
|
|
|
|
Disable CPUID feature X for the kernel. See
|
2009-01-06 22:42:41 +00:00
|
|
|
arch/x86/include/asm/cpufeature.h for the valid bit
|
|
|
|
numbers. Note the Linux specific bits are not necessarily
|
2008-01-30 12:33:21 +00:00
|
|
|
stable over kernel options, but the vendor specific
|
|
|
|
ones should be.
|
|
|
|
Also note that user programs calling CPUID directly
|
|
|
|
or using the feature without checking anything
|
|
|
|
will still see it. This just prevents it from
|
|
|
|
being used by the kernel or shown in /proc/cpuinfo.
|
|
|
|
Also note the kernel might malfunction if you disable
|
|
|
|
some critical bits.
|
|
|
|
|
2009-04-15 05:55:32 +00:00
|
|
|
cmo_free_hint= [PPC] Format: { yes | no }
|
|
|
|
Specify whether pages are marked as being inactive
|
|
|
|
when they are freed. This is used in CMO environments
|
|
|
|
to determine OS memory pressure for page stealing by
|
|
|
|
a hypervisor.
|
|
|
|
Default: yes
|
|
|
|
|
2009-04-14 08:33:43 +00:00
|
|
|
code_bytes [X86] How many bytes of object code to print
|
2008-01-30 12:33:08 +00:00
|
|
|
in an oops report.
|
2007-02-13 12:26:25 +00:00
|
|
|
Range: 0 - 8192
|
|
|
|
Default: 64
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
com20020= [HW,NET] ARCnet - COM20020 chipset
|
2005-10-23 19:57:11 +00:00
|
|
|
Format:
|
|
|
|
<io>[,<irq>[,<nodeID>[,<backplane>[,<ckp>[,<timeout>]]]]]
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
com90io= [HW,NET] ARCnet - COM90xx chipset (IO-mapped buffers)
|
|
|
|
Format: <io>[,<irq>]
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
com90xx= [HW,NET]
|
|
|
|
ARCnet - COM90xx chipset (memory-mapped buffers)
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: <io>[,<irq>[,<memstart>]]
|
|
|
|
|
|
|
|
condev= [HW,S390] console device
|
|
|
|
conmode=
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
console= [KNL] Output console device and options.
|
|
|
|
|
|
|
|
tty<n> Use the virtual console device <n>.
|
|
|
|
|
|
|
|
ttyS<n>[,options]
|
2006-03-25 11:08:17 +00:00
|
|
|
ttyUSB0[,options]
|
2005-04-16 22:20:36 +00:00
|
|
|
Use the specified serial port. The options are of
|
2006-03-25 11:08:17 +00:00
|
|
|
the form "bbbbpnf", where "bbbb" is the baud rate,
|
|
|
|
"p" is parity ("n", "o", or "e"), "n" is number of
|
|
|
|
bits, and "f" is flow control ("r" for RTS or
|
|
|
|
omit it). Default is "9600n8".
|
|
|
|
|
|
|
|
See Documentation/serial-console.txt for more
|
|
|
|
information. See
|
|
|
|
Documentation/networking/netconsole.txt for an
|
|
|
|
alternative.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
serial: convert early_uart to earlycon for 8250
Beacuse SERIAL_PORT_DFNS is removed from include/asm-i386/serial.h and
include/asm-x86_64/serial.h. the serial8250_ports need to be probed late in
serial initializing stage. the console_init=>serial8250_console_init=>
register_console=>serial8250_console_setup will return -ENDEV, and console
ttyS0 can not be enabled at that time. need to wait till uart_add_one_port in
drivers/serial/serial_core.c to call register_console to get console ttyS0.
that is too late.
Make early_uart to use early_param, so uart console can be used earlier. Make
it to be bootconsole with CON_BOOT flag, so can use console handover feature.
and it will switch to corresponding normal serial console automatically.
new command line will be:
console=uart8250,io,0x3f8,9600n8
console=uart8250,mmio,0xff5e0000,115200n8
or
earlycon=uart8250,io,0x3f8,9600n8
earlycon=uart8250,mmio,0xff5e0000,115200n8
it will print in very early stage:
Early serial console at I/O port 0x3f8 (options '9600n8')
console [uart0] enabled
later for console it will print:
console handover: boot [uart0] -> real [ttyS0]
Signed-off-by: <yinghai.lu@sun.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Gerd Hoffmann <kraxel@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-16 06:37:59 +00:00
|
|
|
uart[8250],io,<addr>[,options]
|
|
|
|
uart[8250],mmio,<addr>[,options]
|
2005-04-16 22:20:36 +00:00
|
|
|
Start an early, polled-mode console on the 8250/16550
|
|
|
|
UART at the specified I/O port or MMIO address,
|
|
|
|
switching to the matching ttyS device later. The
|
|
|
|
options are the same as for ttyS, above.
|
|
|
|
|
2008-04-30 07:54:51 +00:00
|
|
|
If the device connected to the port is not a TTY but a braille
|
|
|
|
device, prepend "brl," before the device type, for instance
|
|
|
|
console=brl,ttyS0
|
|
|
|
For now, only VisioBraille is supported.
|
|
|
|
|
2009-06-16 22:33:52 +00:00
|
|
|
consoleblank= [KNL] The console blank (screen saver) timeout in
|
|
|
|
seconds. Defaults to 10*60 = 10mins. A value of 0
|
|
|
|
disables the blank timer.
|
|
|
|
|
2009-01-06 22:42:47 +00:00
|
|
|
coredump_filter=
|
|
|
|
[KNL] Change the default value for
|
|
|
|
/proc/<pid>/coredump_filter.
|
|
|
|
See also Documentation/filesystems/proc.txt.
|
|
|
|
|
2011-04-01 22:13:10 +00:00
|
|
|
cpuidle.off=1 [CPU_IDLE]
|
|
|
|
disable the cpuidle sub-system
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
cpcihp_generic= [HW,PCI] Generic port I/O CompactPCI driver
|
2005-10-23 19:57:11 +00:00
|
|
|
Format:
|
|
|
|
<first_slot>,<last_slot>,<port>,<enum_bit>[,<debug>]
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2011-02-21 04:08:35 +00:00
|
|
|
crashkernel=size[KMG][@offset[KMG]]
|
|
|
|
[KNL] Using kexec, Linux can switch to a 'crash kernel'
|
|
|
|
upon panic. This parameter reserves the physical
|
|
|
|
memory region [offset, offset + size] for that kernel
|
|
|
|
image. If '@offset' is omitted, then a suitable offset
|
|
|
|
is selected automatically. Check
|
|
|
|
Documentation/kdump/kdump.txt for further details.
|
2005-06-25 21:57:52 +00:00
|
|
|
|
2007-10-19 06:41:02 +00:00
|
|
|
crashkernel=range1:size1[,range2:size2,...][@offset]
|
|
|
|
[KNL] Same as above, but depends on the memory
|
|
|
|
in the running system. The syntax of range is
|
|
|
|
start-[end] where start and end are both
|
|
|
|
a memory unit (amount[KMG]). See also
|
2011-02-21 04:08:35 +00:00
|
|
|
Documentation/kdump/kdump.txt for an example.
|
2007-10-19 06:41:02 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
cs89x0_dma= [HW,NET]
|
|
|
|
Format: <dma>
|
|
|
|
|
|
|
|
cs89x0_media= [HW,NET]
|
|
|
|
Format: { rj45 | aui | bnc }
|
2005-10-23 19:57:11 +00:00
|
|
|
|
|
|
|
dasd= [HW,NET]
|
2005-04-16 22:20:36 +00:00
|
|
|
See header of drivers/s390/block/dasd_devmap.c.
|
|
|
|
|
|
|
|
db9.dev[2|3]= [HW,JOY] Multisystem joystick support via parallel port
|
|
|
|
(one device per port)
|
|
|
|
Format: <port#>,<type>
|
|
|
|
See also Documentation/input/joystick-parport.txt
|
|
|
|
|
2010-08-06 14:11:02 +00:00
|
|
|
ddebug_query= [KNL,DYNAMIC_DEBUG] Enable debug messages at early boot
|
|
|
|
time. See Documentation/dynamic-debug-howto.txt for
|
|
|
|
details.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
debug [KNL] Enable kernel debugging (events log level).
|
|
|
|
|
2006-07-03 07:24:48 +00:00
|
|
|
debug_locks_verbose=
|
|
|
|
[KNL] verbose self-tests
|
|
|
|
Format=<0|1>
|
|
|
|
Print debugging info while doing the locking API
|
|
|
|
self-tests.
|
|
|
|
We default to 0 (no extra messages), setting it to
|
|
|
|
1 will print _a lot_ more information - normally
|
|
|
|
only useful to kernel developers.
|
|
|
|
|
2008-04-30 07:55:01 +00:00
|
|
|
debug_objects [KNL] Enable object debugging
|
|
|
|
|
2009-03-02 01:41:41 +00:00
|
|
|
no_debug_objects
|
|
|
|
[KNL] Disable object debugging
|
|
|
|
|
2008-07-15 13:04:56 +00:00
|
|
|
debugpat [X86] Enable PAT debugging
|
|
|
|
|
2008-02-03 13:18:45 +00:00
|
|
|
decnet.addr= [HW,NET]
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: <area>[,<node>]
|
|
|
|
See also Documentation/networking/decnet.txt.
|
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
default_hugepagesz=
|
|
|
|
[same as hugepagesz=] The size of the default
|
|
|
|
HugeTLB page size. This is the size represented by
|
|
|
|
the legacy /proc/ hugepages APIs, used for SHM, and
|
|
|
|
default size when mounting hugetlbfs filesystems.
|
|
|
|
Defaults to the default architecture's huge page size
|
|
|
|
if not specified.
|
2007-05-08 07:38:53 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
dhash_entries= [KNL]
|
|
|
|
Set number of hash buckets for dentry cache.
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
digi= [HW,SERIAL]
|
|
|
|
IO parameters + enable/disable command.
|
|
|
|
|
|
|
|
digiepca= [HW,SERIAL]
|
|
|
|
See drivers/char/README.epca and
|
2008-11-13 21:33:24 +00:00
|
|
|
Documentation/serial/digiepca.txt.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2010-02-04 21:36:50 +00:00
|
|
|
disable= [IPV6]
|
|
|
|
See Documentation/networking/ipv6.txt.
|
|
|
|
|
2011-02-10 09:10:47 +00:00
|
|
|
disable_ddw [PPC/PSERIES]
|
|
|
|
Disable Dynamic DMA Window support. Use this if
|
|
|
|
to workaround buggy firmware.
|
|
|
|
|
2010-02-04 21:36:50 +00:00
|
|
|
disable_ipv6= [IPV6]
|
|
|
|
See Documentation/networking/ipv6.txt.
|
|
|
|
|
2008-04-29 10:52:33 +00:00
|
|
|
disable_mtrr_cleanup [X86]
|
|
|
|
The kernel tries to adjust MTRR layout from continuous
|
|
|
|
to discrete, to make X server driver able to add WB
|
2009-04-05 22:55:22 +00:00
|
|
|
entry later. This parameter disables that.
|
2008-04-29 10:52:33 +00:00
|
|
|
|
2008-01-30 12:33:32 +00:00
|
|
|
disable_mtrr_trim [X86, Intel and AMD only]
|
x86, 32-bit: trim memory not covered by wb mtrrs
On some machines, buggy BIOSes don't properly setup WB MTRRs to cover all
available RAM, meaning the last few megs (or even gigs) of memory will be
marked uncached. Since Linux tends to allocate from high memory addresses
first, this causes the machine to be unusably slow as soon as the kernel
starts really using memory (i.e. right around init time).
This patch works around the problem by scanning the MTRRs at boot and
figuring out whether the current end_pfn value (setup by early e820 code)
goes beyond the highest WB MTRR range, and if so, trimming it to match. A
fairly obnoxious KERN_WARNING is printed too, letting the user know that
not all of their memory is available due to a likely BIOS bug.
Something similar could be done on i386 if needed, but the boot ordering
would be slightly different, since the MTRR code on i386 depends on the
boot_cpu_data structure being setup.
This patch fixes a bug in the last patch that caused the code to run on
non-Intel machines (AMD machines apparently don't need it and it's untested
on other non-Intel machines, so best keep it off).
Further enhancements and fixes from:
Yinghai Lu <Yinghai.Lu@Sun.COM>
Andi Kleen <ak@suse.de>
Signed-off-by: Jesse Barnes <jesse.barnes@intel.com>
Tested-by: Justin Piszcz <jpiszcz@lucidpixels.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 12:33:18 +00:00
|
|
|
By default the kernel will trim any uncacheable
|
|
|
|
memory out of your available memory pool based on
|
|
|
|
MTRR settings. This parameter disables that behavior,
|
|
|
|
possibly causing your machine to run very slowly.
|
|
|
|
|
2009-04-14 08:33:43 +00:00
|
|
|
disable_timer_pin_1 [X86]
|
2009-04-05 22:55:22 +00:00
|
|
|
Disable PIN 1 of APIC timer
|
|
|
|
Can be useful to work around chipset bugs.
|
|
|
|
|
|
|
|
dma_debug=off If the kernel is compiled with DMA_API_DEBUG support,
|
|
|
|
this option disables the debugging code at boot.
|
|
|
|
|
|
|
|
dma_debug_entries=<number>
|
|
|
|
This option allows to tune the number of preallocated
|
|
|
|
entries for DMA-API debugging code. One entry is
|
|
|
|
required per DMA-API allocation. Use this if the
|
|
|
|
DMA-API debugging code disables itself because the
|
|
|
|
architectural default is too low.
|
|
|
|
|
2009-05-22 19:49:51 +00:00
|
|
|
dma_debug_driver=<driver_name>
|
|
|
|
With this option the DMA-API debugging driver
|
|
|
|
filter feature can be enabled at boot time. Just
|
|
|
|
pass the driver to filter for as the parameter.
|
|
|
|
The filter can be disabled or changed to another
|
|
|
|
driver later using sysfs.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
dscc4.setup= [NET]
|
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
earlycon= [KNL] Output early console device and options.
|
|
|
|
uart[8250],io,<addr>[,options]
|
|
|
|
uart[8250],mmio,<addr>[,options]
|
2010-07-20 22:26:51 +00:00
|
|
|
uart[8250],mmio32,<addr>[,options]
|
2009-04-05 22:55:22 +00:00
|
|
|
Start an early, polled-mode console on the 8250/16550
|
|
|
|
UART at the specified I/O port or MMIO address.
|
2011-08-13 19:34:52 +00:00
|
|
|
MMIO inter-register address stride is either 8-bit
|
|
|
|
(mmio) or 32-bit (mmio32).
|
2009-04-05 22:55:22 +00:00
|
|
|
The options are the same as for ttyS, above.
|
|
|
|
|
2009-04-14 08:33:43 +00:00
|
|
|
earlyprintk= [X86,SH,BLACKFIN]
|
2005-04-16 22:20:36 +00:00
|
|
|
earlyprintk=vga
|
|
|
|
earlyprintk=serial[,ttySn[,baudrate]]
|
2009-09-24 14:08:30 +00:00
|
|
|
earlyprintk=ttySn[,baudrate]
|
2009-08-20 20:39:57 +00:00
|
|
|
earlyprintk=dbgp[debugController#]
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
Append ",keep" to not disable it when the real console
|
2005-04-16 22:20:36 +00:00
|
|
|
takes over.
|
|
|
|
|
2008-07-25 00:29:40 +00:00
|
|
|
Only vga or serial or usb debug port at a time.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
Currently only ttyS0 and ttyS1 are supported.
|
|
|
|
|
|
|
|
Interaction with the standard serial driver is not
|
|
|
|
very good.
|
|
|
|
|
|
|
|
The VGA output is eventually overwritten by the real
|
|
|
|
console.
|
|
|
|
|
2010-05-21 02:04:30 +00:00
|
|
|
ekgdboc= [X86,KGDB] Allow early kernel console debugging
|
|
|
|
ekgdboc=kbd
|
|
|
|
|
2011-03-31 01:57:33 +00:00
|
|
|
This is designed to be used in conjunction with
|
2010-05-21 02:04:30 +00:00
|
|
|
the boot argument: earlyprintk=vga
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
edd= [EDD]
|
2008-04-29 08:02:45 +00:00
|
|
|
Format: {"off" | "on" | "skip[mbr]"}
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
eisa_irq_edge= [PARISC,HW]
|
|
|
|
See header of drivers/parisc/eisa.c.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
elanfreq= [X86-32]
|
2005-04-16 22:20:36 +00:00
|
|
|
See comment before function elanfreq_setup() in
|
2008-07-04 16:59:43 +00:00
|
|
|
arch/x86/kernel/cpu/cpufreq/elanfreq.c.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
elevator= [IOSCHED]
|
2010-11-11 11:09:59 +00:00
|
|
|
Format: {"cfq" | "deadline" | "noop"}
|
2011-08-15 00:02:26 +00:00
|
|
|
See Documentation/block/cfq-iosched.txt and
|
2005-10-23 19:57:11 +00:00
|
|
|
Documentation/block/deadline-iosched.txt for details.
|
|
|
|
|
2011-08-13 19:34:52 +00:00
|
|
|
elfcorehdr= [IA-64,PPC,SH,X86]
|
2005-10-23 19:57:11 +00:00
|
|
|
Specifies physical address of start of kernel core
|
2006-01-10 04:51:47 +00:00
|
|
|
image elf header. Generally kexec loader will
|
|
|
|
pass this option to capture kernel.
|
|
|
|
See Documentation/kdump/kdump.txt for details.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
enable_mtrr_cleanup [X86]
|
|
|
|
The kernel tries to adjust MTRR layout from continuous
|
|
|
|
to discrete, to make X server driver able to add WB
|
|
|
|
entry later. This parameter enables that.
|
|
|
|
|
2009-05-06 23:02:58 +00:00
|
|
|
enable_timer_pin_1 [X86]
|
2009-04-05 22:55:22 +00:00
|
|
|
Enable PIN 1 of APIC timer
|
|
|
|
Can be useful to work around chipset bugs
|
|
|
|
(in particular on some ATI chipsets).
|
|
|
|
The kernel tries to set a reasonable default.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
enforcing [SELINUX] Set initial enforcing status.
|
|
|
|
Format: {"0" | "1"}
|
|
|
|
See security/selinux/Kconfig help text.
|
|
|
|
0 -- permissive (log only, no denials).
|
|
|
|
1 -- enforcing (deny and log).
|
|
|
|
Default value is 0.
|
|
|
|
Value can be changed at runtime via /selinux/enforce.
|
|
|
|
|
2010-05-18 06:35:21 +00:00
|
|
|
erst_disable [ACPI]
|
|
|
|
Disable Error Record Serialization Table (ERST)
|
|
|
|
support.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
ether= [HW,NET] Ethernet cards parameters
|
|
|
|
This option is obsoleted by the "netdev=" option, which
|
|
|
|
has equivalent usage. See its documentation for details.
|
|
|
|
|
2011-05-12 22:33:20 +00:00
|
|
|
evm= [EVM]
|
|
|
|
Format: { "fix" }
|
|
|
|
Permit 'security.evm' to be updated regardless of
|
|
|
|
current integrity status.
|
|
|
|
|
2006-12-08 10:39:42 +00:00
|
|
|
failslab=
|
|
|
|
fail_page_alloc=
|
|
|
|
fail_make_request=[KNL]
|
|
|
|
General fault injection mechanism.
|
|
|
|
Format: <interval>,<probability>,<space>,<times>
|
2011-08-15 00:02:26 +00:00
|
|
|
See also Documentation/fault-injection/.
|
2006-12-08 10:39:42 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
floppy= [HW]
|
2008-11-13 21:33:24 +00:00
|
|
|
See Documentation/blockdev/floppy.txt.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-05-08 20:03:23 +00:00
|
|
|
force_pal_cache_flush
|
|
|
|
[IA-64] Avoid check_sal_cache_flush which may hang on
|
|
|
|
buggy SAL_CACHE_FLUSH implementations. Using this
|
|
|
|
parameter will force ia64_sal_cache_flush to call
|
|
|
|
ia64_pal_cache_flush instead of SAL_CACHE_FLUSH.
|
|
|
|
|
2008-11-01 18:57:37 +00:00
|
|
|
ftrace=[tracer]
|
2009-05-28 17:37:24 +00:00
|
|
|
[FTRACE] will set and start the specified tracer
|
2008-11-01 18:57:37 +00:00
|
|
|
as early as possible in order to facilitate early
|
|
|
|
boot debugging.
|
|
|
|
|
2010-04-18 17:08:41 +00:00
|
|
|
ftrace_dump_on_oops[=orig_cpu]
|
2009-05-28 17:37:24 +00:00
|
|
|
[FTRACE] will dump the trace buffers on oops.
|
2010-04-18 17:08:41 +00:00
|
|
|
If no parameter is passed, ftrace will dump
|
|
|
|
buffers of all CPUs, but if you pass orig_cpu, it will
|
|
|
|
dump only the buffer of the CPU that triggered the
|
|
|
|
oops.
|
2009-05-28 17:37:24 +00:00
|
|
|
|
|
|
|
ftrace_filter=[function-list]
|
|
|
|
[FTRACE] Limit the functions traced by the function
|
|
|
|
tracer at boot up. function-list is a comma separated
|
|
|
|
list of functions. This list can be changed at run
|
|
|
|
time by the set_ftrace_filter file in the debugfs
|
2011-08-13 19:34:52 +00:00
|
|
|
tracing directory.
|
2009-05-28 17:37:24 +00:00
|
|
|
|
|
|
|
ftrace_notrace=[function-list]
|
|
|
|
[FTRACE] Do not trace the functions specified in
|
|
|
|
function-list. This list can be changed at run time
|
|
|
|
by the set_ftrace_notrace file in the debugfs
|
|
|
|
tracing directory.
|
2008-11-01 18:57:37 +00:00
|
|
|
|
2009-10-12 20:17:21 +00:00
|
|
|
ftrace_graph_filter=[function-list]
|
|
|
|
[FTRACE] Limit the top level callers functions traced
|
|
|
|
by the function graph tracer at boot up.
|
|
|
|
function-list is a comma separated list of functions
|
|
|
|
that can be changed at run time by the
|
|
|
|
set_graph_function file in the debugfs tracing directory.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
gamecon.map[2|3]=
|
|
|
|
[HW,JOY] Multisystem joystick and NES/SNES/PSX pad
|
|
|
|
support via parallel port (up to 5 devices per port)
|
|
|
|
Format: <port#>,<pad1>,<pad2>,<pad3>,<pad4>,<pad5>
|
|
|
|
See also Documentation/input/joystick-parport.txt
|
|
|
|
|
|
|
|
gamma= [HW,DRM]
|
|
|
|
|
x86: disable the GART early, 64-bit
For K8 system: 4G RAM with memory hole remapping enabled, or more than
4G RAM installed.
when try to use kexec second kernel, and the first doesn't include
gart_shutdown. the second kernel could have different aper position than
the first kernel. and second kernel could use that hole as RAM that is
still used by GART set by the first kernel. esp. when try to kexec
2.6.24 with sparse mem enable from previous kernel (from RHEL 5 or SLES
10). the new kernel will use aper by GART (set by first kernel) for
vmemmap. and after new kernel setting one new GART. the position will be
real RAM. the _mapcount set is lost.
Bad page state in process 'swapper'
page:ffffe2000e600020 flags:0x0000000000000000 mapping:0000000000000000 mapcount:1 count:0
Trying to fix it up, but a reboot is needed
Backtrace:
Pid: 0, comm: swapper Not tainted 2.6.24-rc7-smp-gcdf71a10-dirty #13
Call Trace:
[<ffffffff8026401f>] bad_page+0x63/0x8d
[<ffffffff80264169>] __free_pages_ok+0x7c/0x2a5
[<ffffffff80ba75d1>] free_all_bootmem_core+0xd0/0x198
[<ffffffff80ba3a42>] numa_free_all_bootmem+0x3b/0x76
[<ffffffff80ba3461>] mem_init+0x3b/0x152
[<ffffffff80b959d3>] start_kernel+0x236/0x2c2
[<ffffffff80b9511a>] _sinittext+0x11a/0x121
and
[ffffe2000e600000-ffffe2000e7fffff] PMD ->ffff81001c200000 on node 0
phys addr is : 0x1c200000
RHEL 5.1 kernel -53 said:
PCI-DMA: aperture base @ 1c000000 size 65536 KB
new kernel said:
Mapping aperture over 65536 KB of RAM @ 3c000000
So could try to disable that GART if possible.
According to Ingo
> hm, i'm wondering, instead of modifying the GART, why dont we simply
> _detect_ whatever GART settings we have inherited, and propagate that
> into our e820 maps? I.e. if there's inconsistency, then punch that out
> from the memory maps and just dont use that memory.
>
> that way it would not matter whether the GART settings came from a [old
> or crashing] Linux kernel that has not called gart_iommu_shutdown(), or
> whether it's a BIOS that has set up an aperture hole inconsistent with
> the memory map it passed. (or the memory map we _think_ i tried to pass
> us)
>
> it would also be more robust to only read and do a memory map quirk
> based on that, than actively trying to change the GART so early in the
> bootup. Later on we have to re-enable the GART _anyway_ and have to
> punch a hole for it.
>
> and as a bonus, we would have shored up our defenses against crappy
> BIOSes as well.
add e820 modification for gart inconsistent setting.
gart_fix_e820=off could be used to disable e820 fix.
Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 12:33:09 +00:00
|
|
|
gart_fix_e820= [X86_64] disable the fix e820 for K8 GART
|
|
|
|
Format: off | on
|
|
|
|
default: on
|
|
|
|
|
2009-06-17 23:28:08 +00:00
|
|
|
gcov_persist= [GCOV] When non-zero (default), profiling data for
|
|
|
|
kernel modules is saved and remains accessible via
|
|
|
|
debugfs, even when the module is unloaded/reloaded.
|
|
|
|
When zero, profiling data is discarded and associated
|
|
|
|
debugfs files are removed at module unload time.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
gpt [EFI] Forces disk with valid GPT signature but
|
|
|
|
invalid Protective MBR to be treated as GPT.
|
|
|
|
|
|
|
|
hashdist= [KNL,NUMA] Large hashes allocated during boot
|
|
|
|
are distributed across NUMA nodes. Defaults on
|
2011-08-13 19:34:52 +00:00
|
|
|
for 64-bit NUMA, off otherwise.
|
2005-10-23 19:57:11 +00:00
|
|
|
Format: 0 | 1 (for off | on)
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
hcl= [IA-64] SGI's Hardware Graph compatibility layer
|
|
|
|
|
|
|
|
hd= [EIDE] (E)IDE hard drive subsystem geometry
|
|
|
|
Format: <cyl>,<head>,<sect>
|
|
|
|
|
2010-05-18 06:35:15 +00:00
|
|
|
hest_disable [ACPI]
|
|
|
|
Disable Hardware Error Source Table (HEST) support;
|
|
|
|
corresponding firmware-first mode error processing
|
|
|
|
logic will be disabled.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
highmem=nn[KMG] [KNL,BOOT] forces the highmem zone to have an exact
|
|
|
|
size of <nn>. This works even on boxes that have no
|
|
|
|
highmem otherwise. This also works to reduce highmem
|
|
|
|
size on bigger boxes.
|
|
|
|
|
2007-02-16 09:28:11 +00:00
|
|
|
highres= [KNL] Enable/disable high resolution timer mode.
|
|
|
|
Valid parameters: "on", "off"
|
|
|
|
Default: "on"
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
hisax= [HW,ISDN]
|
|
|
|
See Documentation/isdn/README.HiSax.
|
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
hlt [BUGS=ARM,SH]
|
|
|
|
|
|
|
|
hpet= [X86-32,HPET] option to control HPET usage
|
|
|
|
Format: { enable (default) | disable | force |
|
|
|
|
verbose }
|
|
|
|
disable: disable HPET and use PIT instead
|
|
|
|
force: allow force enabled of undocumented chips (ICH4,
|
|
|
|
VIA, nVidia)
|
|
|
|
verbose: show contents of HPET registers during setup
|
|
|
|
|
2008-07-24 04:27:51 +00:00
|
|
|
hugepages= [HW,X86-32,IA-64] HugeTLB pages to allocate at boot.
|
|
|
|
hugepagesz= [HW,IA-64,PPC,X86-64] The size of the HugeTLB pages.
|
2008-07-24 04:27:56 +00:00
|
|
|
On x86-64 and powerpc, this option can be specified
|
|
|
|
multiple times interleaved with hugepages= to reserve
|
|
|
|
huge pages of different sizes. Valid pages sizes on
|
|
|
|
x86-64 are 2M (when the CPU supports "pse") and 1G
|
|
|
|
(when the CPU supports the "pdpe1gb" cpuinfo flag)
|
2008-07-24 04:27:51 +00:00
|
|
|
Note that 1GB pages can only be allocated at boot time
|
|
|
|
using hugepages= and not freed afterwards.
|
2008-09-21 08:14:42 +00:00
|
|
|
|
2009-01-09 11:15:02 +00:00
|
|
|
hvc_iucv= [S390] Number of z/VM IUCV hypervisor console (HVC)
|
|
|
|
terminal devices. Valid values: 0..8
|
2009-03-26 14:23:55 +00:00
|
|
|
hvc_iucv_allow= [S390] Comma-separated list of z/VM user IDs.
|
|
|
|
If specified, z/VM IUCV HVC accepts connections
|
|
|
|
from listed z/VM user IDs only.
|
2008-12-25 12:39:55 +00:00
|
|
|
|
2011-03-22 23:34:20 +00:00
|
|
|
keep_bootcon [KNL]
|
|
|
|
Do not unregister boot console at start. This is only
|
|
|
|
useful for debugging when something happens in the window
|
|
|
|
between unregistering the boot console and initializing
|
|
|
|
the real console.
|
|
|
|
|
2009-03-24 01:07:47 +00:00
|
|
|
i2c_bus= [HW] Override the default board specific I2C bus speed
|
2009-03-24 01:07:48 +00:00
|
|
|
or register an additional I2C bus that is not
|
|
|
|
registered from board initialization code.
|
2009-03-24 01:07:47 +00:00
|
|
|
Format:
|
|
|
|
<bus_id>,<clkrate>
|
|
|
|
|
2008-10-06 06:51:09 +00:00
|
|
|
i8042.debug [HW] Toggle i8042 debug mode
|
2005-04-16 22:20:36 +00:00
|
|
|
i8042.direct [HW] Put keyboard port into non-translated mode
|
2006-10-03 20:53:09 +00:00
|
|
|
i8042.dumbkbd [HW] Pretend that controller can only read data from
|
|
|
|
keyboard and cannot control its state
|
2005-04-16 22:20:36 +00:00
|
|
|
(Don't attempt to blink the leds)
|
|
|
|
i8042.noaux [HW] Don't check for auxiliary (== mouse) port
|
2005-09-04 06:42:00 +00:00
|
|
|
i8042.nokbd [HW] Don't check/create keyboard port
|
2008-03-13 20:13:59 +00:00
|
|
|
i8042.noloop [HW] Disable the AUX Loopback command while probing
|
|
|
|
for the AUX port
|
2005-04-16 22:20:36 +00:00
|
|
|
i8042.nomux [HW] Don't check presence of an active multiplexing
|
|
|
|
controller
|
|
|
|
i8042.nopnp [HW] Don't use ACPIPnP / PnPBIOS to discover KBD/AUX
|
|
|
|
controllers
|
2011-01-08 09:37:26 +00:00
|
|
|
i8042.notimeout [HW] Ignore timeout condition signalled by conroller
|
2005-04-16 22:20:36 +00:00
|
|
|
i8042.reset [HW] Reset the controller during init and cleanup
|
|
|
|
i8042.unlock [HW] Unlock (ignore) the keylock
|
|
|
|
|
|
|
|
i810= [HW,DRM]
|
|
|
|
|
2005-06-25 21:54:25 +00:00
|
|
|
i8k.ignore_dmi [HW] Continue probing hardware even if DMI data
|
|
|
|
indicates that the driver is running on unsupported
|
|
|
|
hardware.
|
2005-04-16 22:20:36 +00:00
|
|
|
i8k.force [HW] Activate i8k driver even if SMM BIOS signature
|
|
|
|
does not match list of supported models.
|
|
|
|
i8k.power_status
|
|
|
|
[HW] Report power status in /proc/i8k
|
|
|
|
(disabled by default)
|
|
|
|
i8k.restricted [HW] Allow controlling fans only if SYS_ADMIN
|
|
|
|
capability is set.
|
|
|
|
|
|
|
|
icn= [HW,ISDN]
|
|
|
|
Format: <io>[,<membase>[,<icn_id>[,<icn_id2>]]]
|
|
|
|
|
2009-02-25 19:28:21 +00:00
|
|
|
ide-core.nodma= [HW] (E)IDE subsystem
|
|
|
|
Format: =0.0 to prevent dma on hda, =0.1 hdb =1.0 hdc
|
2009-06-07 11:52:52 +00:00
|
|
|
.vlb_clock .pci_clock .noflush .nohpa .noprobe .nowerr
|
|
|
|
.cdrom .chs .ignore_cable are additional options
|
2008-03-07 20:53:50 +00:00
|
|
|
See Documentation/ide/ide.txt.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
ide-pci-generic.all-generic-ide [HW] (E)IDE subsystem
|
|
|
|
Claim all unknown PCI IDE storage controllers.
|
|
|
|
|
2007-05-02 17:27:12 +00:00
|
|
|
idle= [X86]
|
2008-12-19 18:57:32 +00:00
|
|
|
Format: idle=poll, idle=mwait, idle=halt, idle=nomwait
|
|
|
|
Poll forces a polling idle loop that can slightly
|
|
|
|
improve the performance of waking up a idle CPU, but
|
|
|
|
will use a lot of power and make the system run hot.
|
|
|
|
Not recommended.
|
|
|
|
idle=mwait: On systems which support MONITOR/MWAIT but
|
|
|
|
the kernel chose to not use it because it doesn't save
|
|
|
|
as much power as a normal idle loop, use the
|
|
|
|
MONITOR/MWAIT idle loop anyways. Performance should be
|
|
|
|
the same as idle=poll.
|
|
|
|
idle=halt: Halt is forced to be used for CPU idle.
|
2008-06-24 09:58:53 +00:00
|
|
|
In such case C2/C3 won't be used again.
|
2008-12-19 18:57:32 +00:00
|
|
|
idle=nomwait: Disable mwait for CPU C-states
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2006-12-07 04:40:51 +00:00
|
|
|
ignore_loglevel [KNL]
|
|
|
|
Ignore loglevel setting - this will print /all/
|
|
|
|
kernel messages to the console. Useful for debugging.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
ihash_entries= [KNL]
|
|
|
|
Set number of hash buckets for inode cache.
|
|
|
|
|
2009-02-04 14:06:58 +00:00
|
|
|
ima_audit= [IMA]
|
|
|
|
Format: { "0" | "1" }
|
|
|
|
0 -- integrity auditing messages. (Default)
|
|
|
|
1 -- enable informational integrity auditing messages.
|
|
|
|
|
|
|
|
ima_hash= [IMA]
|
2009-09-17 21:14:45 +00:00
|
|
|
Format: { "sha1" | "md5" }
|
2009-02-04 14:06:58 +00:00
|
|
|
default: "sha1"
|
|
|
|
|
2009-05-21 19:47:06 +00:00
|
|
|
ima_tcb [IMA]
|
|
|
|
Load a policy which meets the needs of the Trusted
|
|
|
|
Computing Base. This means IMA will measure all
|
|
|
|
programs exec'd, files mmap'd for exec, and all files
|
|
|
|
opened for read by uid=0.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
init= [KNL]
|
|
|
|
Format: <full_path>
|
|
|
|
Run specified binary instead of /sbin/init as init
|
|
|
|
process.
|
|
|
|
|
|
|
|
initcall_debug [KNL] Trace initcalls as they are executed. Useful
|
|
|
|
for working out where the kernel is dying during
|
|
|
|
startup.
|
|
|
|
|
|
|
|
initrd= [BOOT] Specify the location of the initial ramdisk
|
|
|
|
|
|
|
|
inport.irq= [HW] Inport (ATI XL and Microsoft) busmouse driver
|
|
|
|
Format: <irq>
|
|
|
|
|
2007-10-21 23:41:49 +00:00
|
|
|
intel_iommu= [DMAR] Intel IOMMU driver (DMAR) option
|
2009-02-04 22:29:19 +00:00
|
|
|
on
|
|
|
|
Enable intel iommu driver.
|
2007-10-21 23:41:49 +00:00
|
|
|
off
|
|
|
|
Disable intel iommu driver.
|
|
|
|
igfx_off [Default Off]
|
|
|
|
By default, gfx is mapped as normal device. If a gfx
|
|
|
|
device has a dedicated DMAR unit, the DMAR unit is
|
|
|
|
bypassed by not enabling DMAR with this option. In
|
|
|
|
this case, gfx device will use physical address for
|
|
|
|
DMA.
|
2007-10-21 23:41:53 +00:00
|
|
|
forcedac [x86_64]
|
|
|
|
With this option iommu will not optimize to look
|
2011-08-13 19:34:52 +00:00
|
|
|
for io virtual address below 32-bit forcing dual
|
2007-10-21 23:41:53 +00:00
|
|
|
address cycle on pci bus for cards supporting greater
|
2011-08-13 19:34:52 +00:00
|
|
|
than 32-bit addressing. The default is to look
|
|
|
|
for translation below 32-bit and if not available
|
2007-10-21 23:41:53 +00:00
|
|
|
then look in the higher range.
|
2008-03-04 23:22:08 +00:00
|
|
|
strict [Default Off]
|
|
|
|
With this option on every unmap_single operation will
|
|
|
|
result in a hardware IOTLB flush operation as opposed
|
|
|
|
to batching them for performance.
|
intel-iommu: Enable super page (2MiB, 1GiB, etc.) support
There are no externally-visible changes with this. In the loop in the
internal __domain_mapping() function, we simply detect if we are mapping:
- size >= 2MiB, and
- virtual address aligned to 2MiB, and
- physical address aligned to 2MiB, and
- on hardware that supports superpages.
(and likewise for larger superpages).
We automatically use a superpage for such mappings. We never have to
worry about *breaking* superpages, since we trust that we will always
*unmap* the same range that was mapped. So all we need to do is ensure
that dma_pte_clear_range() will also cope with superpages.
Adjust pfn_to_dma_pte() to take a superpage 'level' as an argument, so
it can return a PTE at the appropriate level rather than always
extending the page tables all the way down to level 1. Again, this is
simplified by the fact that we should never encounter existing small
pages when we're creating a mapping; any old mapping that used the same
virtual range will have been entirely removed and its obsolete page
tables freed.
Provide an 'intel_iommu=sp_off' argument on the command line as a
chicken bit. Not that it should ever be required.
==
The original commit seen in the iommu-2.6.git was Youquan's
implementation (and completion) of my own half-baked code which I'd
typed into an email. Followed by half a dozen subsequent 'fixes'.
I've taken the unusual step of rewriting history and collapsing the
original commits in order to keep the main history simpler, and make
life easier for the people who are going to have to backport this to
older kernels. And also so I can give it a more coherent commit comment
which (hopefully) gives a better explanation of what's going on.
The original sequence of commits leading to identical code was:
Youquan Song (3):
intel-iommu: super page support
intel-iommu: Fix superpage alignment calculation error
intel-iommu: Fix superpage level calculation error in dma_pfn_level_pte()
David Woodhouse (4):
intel-iommu: Precalculate superpage support for dmar_domain
intel-iommu: Fix hardware_largepage_caps()
intel-iommu: Fix inappropriate use of superpages in __domain_mapping()
intel-iommu: Fix phys_pfn in __domain_mapping for sglist pages
Signed-off-by: Youquan Song <youquan.song@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2011-05-25 18:13:49 +00:00
|
|
|
sp_off [Default Off]
|
|
|
|
By default, super page will be supported if Intel IOMMU
|
|
|
|
has the capability. With this option, super page will
|
|
|
|
not be supported.
|
2010-07-20 18:06:49 +00:00
|
|
|
intremap= [X86-64, Intel-IOMMU]
|
|
|
|
on enable Interrupt Remapping (default)
|
|
|
|
off disable Interrupt Remapping
|
|
|
|
nosid disable Source ID checking
|
2011-08-24 00:05:18 +00:00
|
|
|
no_x2apic_optout
|
|
|
|
BIOS x2APIC opt-out request will be ignored
|
2010-07-20 18:06:49 +00:00
|
|
|
|
2011-08-13 19:34:52 +00:00
|
|
|
inttest= [IA-64]
|
2009-04-05 22:55:22 +00:00
|
|
|
|
|
|
|
iomem= Disable strict checking of access to MMIO memory
|
|
|
|
strict regions from userspace.
|
|
|
|
relaxed
|
|
|
|
|
|
|
|
iommu= [x86]
|
|
|
|
off
|
|
|
|
force
|
|
|
|
noforce
|
|
|
|
biomerge
|
|
|
|
panic
|
|
|
|
nopanic
|
|
|
|
merge
|
|
|
|
nomerge
|
|
|
|
forcesac
|
|
|
|
soft
|
2011-08-13 19:34:52 +00:00
|
|
|
pt [x86, IA-64]
|
2009-04-05 22:55:22 +00:00
|
|
|
|
|
|
|
io7= [HW] IO7 for Marvel based alpha systems
|
|
|
|
See comment before marvel_specify_io7 in
|
|
|
|
arch/alpha/kernel/core_marvel.c.
|
|
|
|
|
2009-04-14 08:33:43 +00:00
|
|
|
io_delay= [X86] I/O delay method
|
2008-01-30 12:30:05 +00:00
|
|
|
0x80
|
|
|
|
Standard port 0x80 based delay
|
|
|
|
0xed
|
|
|
|
Alternate port 0xed based delay (needed on some systems)
|
2008-01-30 12:30:05 +00:00
|
|
|
udelay
|
2008-01-30 12:30:05 +00:00
|
|
|
Simple two microseconds delay
|
|
|
|
none
|
|
|
|
No delay
|
2008-01-30 12:30:05 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
ip= [IP_PNP]
|
2009-10-27 18:41:35 +00:00
|
|
|
See Documentation/filesystems/nfs/nfsroot.txt.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
ip2= [HW] Set IO/IRQ pairs for up to 4 IntelliPort boards
|
2007-07-31 07:37:40 +00:00
|
|
|
See comment before ip2_setup() in
|
|
|
|
drivers/char/ip2/ip2base.c.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-29 03:45:18 +00:00
|
|
|
irqfixup [HW]
|
|
|
|
When an interrupt is not handled search all handlers
|
|
|
|
for it. Intended to get systems with badly broken
|
|
|
|
firmware running.
|
|
|
|
|
|
|
|
irqpoll [HW]
|
|
|
|
When an interrupt is not handled search all handlers
|
|
|
|
for it. Also check all handlers each timer
|
|
|
|
interrupt. Intended to get systems with badly broken
|
|
|
|
firmware running.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
isapnp= [ISAPNP]
|
2005-10-23 19:57:11 +00:00
|
|
|
Format: <RDP>,<reset>,<pci_scan>,<verbosity>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
isolcpus= [KNL,SMP] Isolate CPUs from the general scheduler.
|
2006-12-07 04:37:11 +00:00
|
|
|
Format:
|
|
|
|
<cpu number>,...,<cpu number>
|
|
|
|
or
|
2008-11-06 20:53:39 +00:00
|
|
|
<cpu number>-<cpu number>
|
|
|
|
(must be a positive range in ascending order)
|
2006-12-07 04:37:11 +00:00
|
|
|
or a mixture
|
|
|
|
<cpu number>,...,<cpu number>-<cpu number>
|
2008-11-06 20:53:39 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
This option can be used to specify one or more CPUs
|
|
|
|
to isolate from the general SMP balancing and scheduling
|
2008-11-06 20:53:39 +00:00
|
|
|
algorithms. You can move a process onto or off an
|
|
|
|
"isolated" CPU via the CPU affinity syscalls or cpuset.
|
2005-04-16 22:20:36 +00:00
|
|
|
<cpu number> begins at 0 and the maximum value is
|
|
|
|
"number of CPUs in system - 1".
|
|
|
|
|
|
|
|
This option is the preferred way to isolate CPUs. The
|
2005-10-23 19:57:11 +00:00
|
|
|
alternative -- manually setting the CPU mask of all
|
|
|
|
tasks in the system -- can cause problems and
|
|
|
|
suboptimal load balancer performance.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
iucv= [HW,NET]
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
js= [HW,JOY] Analog joystick
|
|
|
|
See Documentation/input/joystick.txt.
|
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
keepinitrd [HW,ARM]
|
|
|
|
|
2009-04-14 08:33:43 +00:00
|
|
|
kernelcore=nn[KMG] [KNL,X86,IA-64,PPC] This parameter
|
2007-07-17 11:03:14 +00:00
|
|
|
specifies the amount of memory usable by the kernel
|
|
|
|
for non-movable allocations. The requested amount is
|
|
|
|
spread evenly throughout all nodes in the system. The
|
|
|
|
remaining memory in each node is used for Movable
|
|
|
|
pages. In the event, a node is too small to have both
|
|
|
|
kernelcore and Movable pages, kernelcore pages will
|
|
|
|
take priority and other nodes will have a larger number
|
|
|
|
of kernelcore pages. The Movable zone is used for the
|
|
|
|
allocation of pages that may be reclaimed or moved
|
|
|
|
by the page migration subsystem. This means that
|
|
|
|
HugeTLB pages may not be allocated from this zone.
|
|
|
|
Note that allocations like PTEs-from-HighMem still
|
|
|
|
use the HighMem zone if it exists, and the Normal
|
|
|
|
zone if it does not.
|
|
|
|
|
2010-05-21 02:04:31 +00:00
|
|
|
kgdbdbgp= [KGDB,HW] kgdb over EHCI usb debug port.
|
|
|
|
Format: <Controller#>[,poll interval]
|
|
|
|
The controller # is the number of the ehci usb debug
|
|
|
|
port as it is probed via PCI. The poll interval is
|
|
|
|
optional and is the number seconds in between
|
|
|
|
each poll cycle to the debug port in case you need
|
|
|
|
the functionality for interrupting the kernel with
|
|
|
|
gdb or control-c on the dbgp connection. When
|
|
|
|
not using this parameter you use sysrq-g to break into
|
|
|
|
the kernel debugger.
|
|
|
|
|
2010-05-21 02:04:24 +00:00
|
|
|
kgdboc= [KGDB,HW] kgdb over consoles.
|
2010-05-21 02:04:24 +00:00
|
|
|
Requires a tty driver that supports console polling,
|
|
|
|
or a supported polling keyboard driver (non-usb).
|
2010-08-05 14:22:33 +00:00
|
|
|
Serial only format: <serial_device>[,baud]
|
|
|
|
keyboard only format: kbd
|
|
|
|
keyboard and serial format: kbd,<serial_device>[,baud]
|
|
|
|
Optional Kernel mode setting:
|
|
|
|
kms, kbd format: kms,kbd
|
|
|
|
kms, kbd and serial format: kms,kbd,<ser_dev>[,baud]
|
2008-04-17 18:05:38 +00:00
|
|
|
|
2010-05-21 02:04:24 +00:00
|
|
|
kgdbwait [KGDB] Stop kernel execution and enter the
|
|
|
|
kernel debugger at the earliest opportunity.
|
|
|
|
|
2008-08-23 16:54:37 +00:00
|
|
|
kmac= [MIPS] korina ethernet MAC address.
|
|
|
|
Configure the RouterBoard 532 series on-chip
|
|
|
|
Ethernet adapter MAC address.
|
|
|
|
|
2009-06-11 12:22:39 +00:00
|
|
|
kmemleak= [KNL] Boot-time kmemleak enable/disable
|
|
|
|
Valid arguments: on, off
|
|
|
|
Default: on
|
|
|
|
|
2009-04-14 08:33:43 +00:00
|
|
|
kstack=N [X86] Print N words from the kernel stack
|
2009-04-05 22:55:22 +00:00
|
|
|
in oops dumps.
|
|
|
|
|
2009-07-10 12:20:35 +00:00
|
|
|
kvm.ignore_msrs=[KVM] Ignore guest accesses to unhandled MSRs.
|
|
|
|
Default is 0 (don't ignore, but inject #GP)
|
|
|
|
|
|
|
|
kvm.oos_shadow= [KVM] Disable out-of-sync shadow paging.
|
|
|
|
Default is 1 (enabled)
|
|
|
|
|
2010-09-20 14:17:48 +00:00
|
|
|
kvm.mmu_audit= [KVM] This is a R/W parameter which allows audit
|
|
|
|
KVM MMU at runtime.
|
2009-07-10 12:20:35 +00:00
|
|
|
Default is 0 (off)
|
|
|
|
|
|
|
|
kvm-amd.nested= [KVM,AMD] Allow nested virtualization in KVM/SVM.
|
2010-09-20 14:16:45 +00:00
|
|
|
Default is 1 (enabled)
|
2009-07-10 12:20:35 +00:00
|
|
|
|
|
|
|
kvm-amd.npt= [KVM,AMD] Disable nested paging (virtualized MMU)
|
|
|
|
for all guests.
|
2011-08-13 19:34:52 +00:00
|
|
|
Default is 1 (enabled) if in 64-bit or 32-bit PAE mode.
|
2009-07-10 12:20:35 +00:00
|
|
|
|
|
|
|
kvm-intel.ept= [KVM,Intel] Disable extended page tables
|
|
|
|
(virtualized MMU) support on capable Intel chips.
|
|
|
|
Default is 1 (enabled)
|
|
|
|
|
|
|
|
kvm-intel.emulate_invalid_guest_state=
|
|
|
|
[KVM,Intel] Enable emulation of invalid guest states
|
|
|
|
Default is 0 (disabled)
|
|
|
|
|
|
|
|
kvm-intel.flexpriority=
|
|
|
|
[KVM,Intel] Disable FlexPriority feature (TPR shadow).
|
|
|
|
Default is 1 (enabled)
|
|
|
|
|
2011-08-09 11:28:35 +00:00
|
|
|
kvm-intel.nested=
|
|
|
|
[KVM,Intel] Enable VMX nesting (nVMX).
|
|
|
|
Default is 0 (disabled)
|
|
|
|
|
2009-07-10 12:20:35 +00:00
|
|
|
kvm-intel.unrestricted_guest=
|
|
|
|
[KVM,Intel] Disable unrestricted guest feature
|
|
|
|
(virtualized real and unpaged mode) on capable
|
|
|
|
Intel chips. Default is 1 (enabled)
|
|
|
|
|
|
|
|
kvm-intel.vpid= [KVM,Intel] Disable Virtual Processor Identification
|
|
|
|
feature (tagged TLBs) on capable Intel chips.
|
|
|
|
Default is 1 (enabled)
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
l2cr= [PPC]
|
|
|
|
|
2008-03-28 20:20:23 +00:00
|
|
|
l3cr= [PPC]
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
lapic [X86-32,APIC] Enable the local APIC even if BIOS
|
2005-10-23 19:57:11 +00:00
|
|
|
disabled it.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2009-04-14 08:33:43 +00:00
|
|
|
lapic_timer_c2_ok [X86,APIC] trust the local apic timer
|
2008-12-19 18:57:32 +00:00
|
|
|
in C2 power state.
|
2007-03-23 15:08:01 +00:00
|
|
|
|
2008-01-06 18:08:56 +00:00
|
|
|
libata.dma= [LIBATA] DMA control
|
|
|
|
libata.dma=0 Disable all PATA and SATA DMA
|
|
|
|
libata.dma=1 PATA and SATA Disk DMA only
|
|
|
|
libata.dma=2 ATAPI (CDROM) DMA only
|
2011-08-13 19:34:52 +00:00
|
|
|
libata.dma=4 Compact Flash DMA only
|
2008-01-06 18:08:56 +00:00
|
|
|
Combinations also work, so libata.dma=3 enables DMA
|
|
|
|
for disks and CDROMs, but not CFs.
|
2011-08-13 19:34:52 +00:00
|
|
|
|
2009-08-05 22:14:10 +00:00
|
|
|
libata.ignore_hpa= [LIBATA] Ignore HPA limit
|
|
|
|
libata.ignore_hpa=0 keep BIOS limits (default)
|
|
|
|
libata.ignore_hpa=1 ignore limits, using full disk
|
2008-01-06 18:08:56 +00:00
|
|
|
|
2007-09-27 15:50:13 +00:00
|
|
|
libata.noacpi [LIBATA] Disables use of ACPI in libata suspend/resume
|
|
|
|
when set.
|
|
|
|
Format: <int>
|
|
|
|
|
2008-02-13 00:15:09 +00:00
|
|
|
libata.force= [LIBATA] Force configurations. The format is comma
|
|
|
|
separated list of "[ID:]VAL" where ID is
|
2010-04-21 10:17:12 +00:00
|
|
|
PORT[.DEVICE]. PORT and DEVICE are decimal numbers
|
2008-02-13 00:15:09 +00:00
|
|
|
matching port, link or device. Basically, it matches
|
|
|
|
the ATA ID string printed on console by libata. If
|
|
|
|
the whole ID part is omitted, the last PORT and DEVICE
|
|
|
|
values are used. If ID hasn't been specified yet, the
|
|
|
|
configuration applies to all ports, links and devices.
|
|
|
|
|
|
|
|
If only DEVICE is omitted, the parameter applies to
|
|
|
|
the port and all links and devices behind it. DEVICE
|
|
|
|
number of 0 either selects the first device or the
|
|
|
|
first fan-out link behind PMP device. It does not
|
|
|
|
select the host link. DEVICE number of 15 selects the
|
|
|
|
host link and device attached to it.
|
|
|
|
|
|
|
|
The VAL specifies the configuration to force. As long
|
|
|
|
as there's no ambiguity shortcut notation is allowed.
|
|
|
|
For example, both 1.5 and 1.5G would work for 1.5Gbps.
|
|
|
|
The following configurations can be forced.
|
|
|
|
|
|
|
|
* Cable type: 40c, 80c, short40c, unk, ign or sata.
|
|
|
|
Any ID with matching PORT is used.
|
|
|
|
|
|
|
|
* SATA link speed limit: 1.5Gbps or 3.0Gbps.
|
|
|
|
|
|
|
|
* Transfer mode: pio[0-7], mwdma[0-4] and udma[0-7].
|
|
|
|
udma[/][16,25,33,44,66,100,133] notation is also
|
|
|
|
allowed.
|
|
|
|
|
|
|
|
* [no]ncq: Turn on or off NCQ.
|
|
|
|
|
2008-08-13 11:19:09 +00:00
|
|
|
* nohrst, nosrst, norst: suppress hard, soft
|
|
|
|
and both resets.
|
|
|
|
|
2010-05-23 10:59:11 +00:00
|
|
|
* dump_id: dump IDENTIFY data.
|
|
|
|
|
2008-02-13 00:15:09 +00:00
|
|
|
If there are multiple matching configurations changing
|
|
|
|
the same attribute, the last one is used.
|
|
|
|
|
2010-07-12 04:36:09 +00:00
|
|
|
memblock=debug [KNL] Enable memblock debug messages.
|
2009-01-06 22:42:44 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
load_ramdisk= [RAM] List of ramdisks to load from floppy
|
2008-11-13 21:33:24 +00:00
|
|
|
See Documentation/blockdev/ramdisk.txt.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-01-14 21:21:19 +00:00
|
|
|
lockd.nlm_grace_period=P [NFS] Assign grace period.
|
|
|
|
Format: <integer>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-01-14 21:21:19 +00:00
|
|
|
lockd.nlm_tcpport=N [NFS] Assign TCP port.
|
|
|
|
Format: <integer>
|
|
|
|
|
|
|
|
lockd.nlm_timeout=T [NFS] Assign timeout value.
|
|
|
|
Format: <integer>
|
|
|
|
|
|
|
|
lockd.nlm_udpport=M [NFS] Assign UDP port.
|
|
|
|
Format: <integer>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
logibm.irq= [HW,MOUSE] Logitech Bus Mouse Driver
|
|
|
|
Format: <irq>
|
|
|
|
|
|
|
|
loglevel= All Kernel Messages with a loglevel smaller than the
|
|
|
|
console loglevel will be printed to the console. It can
|
|
|
|
also be changed with klogd or other programs. The
|
|
|
|
loglevels are defined as follows:
|
|
|
|
|
|
|
|
0 (KERN_EMERG) system is unusable
|
|
|
|
1 (KERN_ALERT) action must be taken immediately
|
|
|
|
2 (KERN_CRIT) critical conditions
|
|
|
|
3 (KERN_ERR) error conditions
|
|
|
|
4 (KERN_WARNING) warning conditions
|
|
|
|
5 (KERN_NOTICE) normal but significant condition
|
|
|
|
6 (KERN_INFO) informational
|
|
|
|
7 (KERN_DEBUG) debug-level messages
|
|
|
|
|
2011-02-21 04:08:35 +00:00
|
|
|
log_buf_len=n[KMG] Sets the size of the printk ring buffer,
|
|
|
|
in bytes. n must be a power of two. The default
|
|
|
|
size is set in the kernel config file.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-10-16 08:29:37 +00:00
|
|
|
logo.nologo [FB] Disables display of the built-in Linux logo.
|
|
|
|
This may be used to provide more screen space for
|
|
|
|
kernel log messages and is useful when debugging
|
|
|
|
kernel boot problems.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
lp=0 [LP] Specify parallel ports to use, e.g,
|
|
|
|
lp=port[,port...] lp=none,parport0 (lp0 not configured, lp1 uses
|
|
|
|
lp=reset first parallel port). 'lp=0' disables the
|
|
|
|
lp=auto printer driver. 'lp=reset' (which can be
|
|
|
|
specified in addition to the ports) causes
|
|
|
|
attached printers to be reset. Using
|
|
|
|
lp=port1,port2,... specifies the parallel ports
|
|
|
|
to associate lp devices with, starting with
|
|
|
|
lp0. A port specification may be 'none' to skip
|
|
|
|
that lp device, or a parport name such as
|
|
|
|
'parport0'. Specifying 'lp=auto' instead of a
|
|
|
|
port specification list means that device IDs
|
|
|
|
from each port should be examined, to see if
|
|
|
|
an IEEE 1284-compliant printer is attached; if
|
|
|
|
so, the driver will manage that printer.
|
|
|
|
See also header of drivers/char/lp.c.
|
|
|
|
|
|
|
|
lpj=n [KNL]
|
|
|
|
Sets loops_per_jiffy to given constant, thus avoiding
|
|
|
|
time-consuming boot-time autodetection (up to 250 ms per
|
|
|
|
CPU). 0 enables autodetection (default). To determine
|
|
|
|
the correct value for your kernel, boot with normal
|
|
|
|
autodetection and see what value is printed. Note that
|
|
|
|
on SMP systems the preset will be applied to all CPUs,
|
|
|
|
which is likely to cause problems if your CPUs need
|
|
|
|
significantly divergent settings. An incorrect value
|
|
|
|
will cause delays in the kernel to be wrong, leading to
|
|
|
|
unpredictable I/O errors and other breakage. Although
|
|
|
|
unlikely, in the extreme case this might damage your
|
|
|
|
hardware.
|
|
|
|
|
|
|
|
ltpc= [NET]
|
|
|
|
Format: <io>,<irq>,<dma>
|
|
|
|
|
2011-08-13 19:34:52 +00:00
|
|
|
machvec= [IA-64] Force the use of a particular machine-vector
|
2005-10-23 19:57:11 +00:00
|
|
|
(machvec) in a generic kernel.
|
|
|
|
Example: machvec=hpzx1_swiotlb
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2009-07-02 15:27:12 +00:00
|
|
|
machtype= [Loongson] Share the same kernel image file between different
|
|
|
|
yeeloong laptop.
|
|
|
|
Example: machtype=lemote-yeeloong-2f-7inch
|
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
max_addr=nn[KMG] [KNL,BOOT,ia64] All physical memory greater
|
|
|
|
than or equal to this physical address is ignored.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
maxcpus= [SMP] Maximum number of processors that an SMP kernel
|
2007-08-16 07:34:22 +00:00
|
|
|
should make use of. maxcpus=n : n >= 0 limits the
|
|
|
|
kernel to using 'n' processors. n=0 is a special case,
|
|
|
|
it is equivalent to "nosmp", which also disables
|
|
|
|
the IO APIC.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2011-07-31 20:08:04 +00:00
|
|
|
max_loop= [LOOP] The number of loop block devices that get
|
|
|
|
(loop.max_loop) unconditionally pre-created at init time. The default
|
|
|
|
number is configured by BLK_DEV_LOOP_MIN_COUNT. Instead
|
|
|
|
of statically allocating a predefined number, loop
|
|
|
|
devices can be requested on-demand with the
|
|
|
|
/dev/loop-control interface.
|
2005-06-30 01:00:00 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
mcatest= [IA-64]
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
mce [X86-32] Machine Check Exception
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-10-20 16:32:21 +00:00
|
|
|
mce=option [X86-64] See Documentation/x86/x86_64/boot-options.txt
|
2007-10-17 16:04:38 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
md= [HW] RAID subsystems devices and level
|
|
|
|
See Documentation/md.txt.
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
mdacon= [MDA]
|
|
|
|
Format: <first>,<last>
|
|
|
|
Specifies range of consoles to be captured by the MDA.
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
mem=nn[KMG] [KNL,BOOT] Force usage of a specific amount of memory
|
|
|
|
Amount of memory to be used when the kernel is not able
|
|
|
|
to see the whole system memory or for test.
|
2007-07-31 07:37:59 +00:00
|
|
|
[X86-32] Use together with memmap= to avoid physical
|
2005-04-16 22:20:36 +00:00
|
|
|
address space collisions. Without memmap= PCI devices
|
|
|
|
could be placed at addresses belonging to unused RAM.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
mem=nopentium [BUGS=X86-32] Disable usage of 4MB pages for kernel
|
2005-04-16 22:20:36 +00:00
|
|
|
memory.
|
|
|
|
|
2008-09-21 08:14:42 +00:00
|
|
|
memchunk=nn[KMG]
|
|
|
|
[KNL,SH] Allow user to override the default size for
|
|
|
|
per-device physically contiguous DMA buffers.
|
|
|
|
|
2009-04-14 08:33:43 +00:00
|
|
|
memmap=exactmap [KNL,X86] Enable setting of an exact
|
2005-04-16 22:20:36 +00:00
|
|
|
E820 memory map, as specified by the user.
|
|
|
|
Such memmap=exactmap lines can be constructed based on
|
|
|
|
BIOS output or other requirements. See the memmap=nn@ss
|
|
|
|
option description.
|
|
|
|
|
|
|
|
memmap=nn[KMG]@ss[KMG]
|
|
|
|
[KNL] Force usage of a specific region of memory
|
|
|
|
Region of memory to be used, from ss to ss+nn.
|
|
|
|
|
|
|
|
memmap=nn[KMG]#ss[KMG]
|
|
|
|
[KNL,ACPI] Mark specific memory as ACPI data.
|
|
|
|
Region of memory to be used, from ss to ss+nn.
|
|
|
|
|
|
|
|
memmap=nn[KMG]$ss[KMG]
|
|
|
|
[KNL,ACPI] Mark specific memory as reserved.
|
|
|
|
Region of memory to be used, from ss to ss+nn.
|
2008-03-24 19:29:43 +00:00
|
|
|
Example: Exclude memory from 0x18690000-0x1869ffff
|
|
|
|
memmap=64K$0x18690000
|
|
|
|
or
|
|
|
|
memmap=0x10000$0x18690000
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-09-07 08:51:34 +00:00
|
|
|
memory_corruption_check=0/1 [X86]
|
|
|
|
Some BIOSes seem to corrupt the first 64k of
|
|
|
|
memory when doing things like suspend/resume.
|
|
|
|
Setting this option will scan the memory
|
|
|
|
looking for corruption. Enabling this will
|
|
|
|
both detect corruption and prevent the kernel
|
|
|
|
from using the memory being corrupted.
|
|
|
|
However, its intended as a diagnostic tool; if
|
|
|
|
repeatable BIOS-originated corruption always
|
|
|
|
affects the same memory, you can use memmap=
|
|
|
|
to prevent the kernel from using that memory.
|
|
|
|
|
|
|
|
memory_corruption_check_size=size [X86]
|
|
|
|
By default it checks for corruption in the low
|
|
|
|
64k, making this memory unavailable for normal
|
|
|
|
use. Use this parameter to scan for
|
|
|
|
corruption in more or less memory.
|
|
|
|
|
|
|
|
memory_corruption_check_period=seconds [X86]
|
|
|
|
By default it checks for corruption every 60
|
|
|
|
seconds. Use this parameter to check at some
|
|
|
|
other rate. 0 disables periodic checking.
|
|
|
|
|
2008-07-15 07:03:44 +00:00
|
|
|
memtest= [KNL,X86] Enable memtest
|
2008-03-22 01:56:19 +00:00
|
|
|
Format: <integer>
|
|
|
|
default : 0 <disable>
|
2009-02-25 10:30:45 +00:00
|
|
|
Specifies the number of memtest passes to be
|
|
|
|
performed. Each pass selects another test
|
|
|
|
pattern from a given set of patterns. Memtest
|
|
|
|
fills the memory with this pattern, validates
|
|
|
|
memory contents and reserves bad memory
|
|
|
|
regions that are detected.
|
2008-03-22 01:56:19 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
meye.*= [HW] Set MotionEye Camera parameters
|
|
|
|
See Documentation/video4linux/meye.txt.
|
|
|
|
|
2007-10-12 21:04:06 +00:00
|
|
|
mfgpt_irq= [IA-32] Specify the IRQ to use for the
|
|
|
|
Multi-Function General Purpose Timers on AMD Geode
|
|
|
|
platforms.
|
|
|
|
|
2008-01-30 12:33:33 +00:00
|
|
|
mfgptfix [X86-32] Fix MFGPT timers on AMD Geode platforms when
|
|
|
|
the BIOS has incorrectly applied a workaround. TinyBIOS
|
|
|
|
version 0.98 is known to be affected, 0.99 fixes the
|
|
|
|
problem by letting the user disable the workaround.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
mga= [HW,DRM]
|
|
|
|
|
2008-11-19 23:36:16 +00:00
|
|
|
min_addr=nn[KMG] [KNL,BOOT,ia64] All physical memory below this
|
|
|
|
physical address is ignored.
|
|
|
|
|
2009-05-20 10:10:31 +00:00
|
|
|
mini2440= [ARM,HW,KNL]
|
|
|
|
Format:[0..2][b][c][t]
|
|
|
|
Default: "0tb"
|
|
|
|
MINI2440 configuration specification:
|
|
|
|
0 - The attached screen is the 3.5" TFT
|
|
|
|
1 - The attached screen is the 7" TFT
|
|
|
|
2 - The VGA Shield is attached (1024x768)
|
|
|
|
Leaving out the screen size parameter will not load
|
|
|
|
the TFT driver, and the framebuffer will be left
|
|
|
|
unconfigured.
|
|
|
|
b - Enable backlight. The TFT backlight pin will be
|
|
|
|
linked to the kernel VESA blanking code and a GPIO
|
|
|
|
LED. This parameter is not necessary when using the
|
|
|
|
VGA shield.
|
|
|
|
c - Enable the s3c camera interface.
|
|
|
|
t - Reserved for enabling touchscreen support. The
|
|
|
|
touchscreen support is not enabled in the mainstream
|
|
|
|
kernel as of 2.6.30, a preliminary port can be found
|
|
|
|
in the "bleeding edge" mini2440 support kernel at
|
|
|
|
http://repo.or.cz/w/linux-2.6/mini2440.git
|
|
|
|
|
2008-07-24 04:26:49 +00:00
|
|
|
mminit_loglevel=
|
|
|
|
[KNL] When CONFIG_DEBUG_MEMORY_INIT is set, this
|
|
|
|
parameter allows control of the logging verbosity for
|
|
|
|
the additional memory initialisation checks. A value
|
|
|
|
of 0 disables mminit logging and a level of 4 will
|
|
|
|
log everything. Information is printed at KERN_DEBUG
|
|
|
|
so loglevel=8 may also need to be specified.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
mousedev.tap_time=
|
|
|
|
[MOUSE] Maximum time between finger touching and
|
|
|
|
leaving touchpad surface for touch to be considered
|
|
|
|
a tap and be reported as a left button click (for
|
|
|
|
touchpads working in absolute mode only).
|
|
|
|
Format: <msecs>
|
|
|
|
mousedev.xres= [MOUSE] Horizontal screen resolution, used for devices
|
|
|
|
reporting absolute coordinates, such as tablets
|
|
|
|
mousedev.yres= [MOUSE] Vertical screen resolution, used for devices
|
|
|
|
reporting absolute coordinates, such as tablets
|
|
|
|
|
2009-04-14 08:33:43 +00:00
|
|
|
movablecore=nn[KMG] [KNL,X86,IA-64,PPC] This parameter
|
2009-04-05 22:55:22 +00:00
|
|
|
is similar to kernelcore except it specifies the
|
|
|
|
amount of memory used for migratable allocations.
|
|
|
|
If both kernelcore and movablecore is specified,
|
|
|
|
then kernelcore will be at *least* the specified
|
|
|
|
value but may be more. If movablecore on its own
|
|
|
|
is specified, the administrator must be careful
|
|
|
|
that the amount of memory usable for all allocations
|
|
|
|
is not too small.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
MTD_Partition= [MTD]
|
|
|
|
Format: <name>,<region-number>,<size>,<offset>
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
MTD_Region= [MTD] Format:
|
|
|
|
<name>,<region-number>[,<base>,<size>,<buswidth>,<altbuswidth>]
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
mtdparts= [MTD]
|
2007-07-31 07:37:40 +00:00
|
|
|
See drivers/mtd/cmdlinepart.c.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2010-09-28 15:33:12 +00:00
|
|
|
multitce=off [PPC] This parameter disables the use of the pSeries
|
|
|
|
firmware feature for updating multiple TCE entries
|
|
|
|
at a time.
|
|
|
|
|
2009-05-12 20:46:57 +00:00
|
|
|
onenand.bdry= [HW,MTD] Flex-OneNAND Boundary Configuration
|
|
|
|
|
|
|
|
Format: [die0_boundary][,die0_lock][,die1_boundary][,die1_lock]
|
|
|
|
|
|
|
|
boundary - index of last SLC block on Flex-OneNAND.
|
|
|
|
The remaining blocks are configured as MLC blocks.
|
|
|
|
lock - Configure if Flex-OneNAND boundary should be locked.
|
|
|
|
Once locked, the boundary cannot be changed.
|
|
|
|
1 indicates lock status, 0 indicates unlock status.
|
|
|
|
|
2008-07-03 10:24:29 +00:00
|
|
|
mtdset= [ARM]
|
|
|
|
ARM/S3C2412 JIVE boot control
|
|
|
|
|
|
|
|
See arch/arm/mach-s3c2412/mach-jive.c
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
mtouchusb.raw_coordinates=
|
2005-10-23 19:57:11 +00:00
|
|
|
[HW] Make the MicroTouch USB driver use raw coordinates
|
|
|
|
('y', default) or cooked coordinates ('n')
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
mtrr_chunk_size=nn[KMG] [X86]
|
2009-04-27 13:06:31 +00:00
|
|
|
used for mtrr cleanup. It is largest continuous chunk
|
2009-04-05 22:55:22 +00:00
|
|
|
that could hold holes aka. UC entries.
|
|
|
|
|
|
|
|
mtrr_gran_size=nn[KMG] [X86]
|
|
|
|
Used for mtrr cleanup. It is granularity of mtrr block.
|
|
|
|
Default is 1.
|
|
|
|
Large value could prevent small alignment from
|
|
|
|
using up MTRRs.
|
|
|
|
|
|
|
|
mtrr_spare_reg_nr=n [X86]
|
|
|
|
Format: <integer>
|
|
|
|
Range: 0,7 : spare reg number
|
|
|
|
Default : 1
|
|
|
|
Used for mtrr cleanup. It is spare mtrr entries number.
|
|
|
|
Set to 2 or more if your graphical card needs more.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
n2= [NET] SDL Inc. RISCom/N2 synchronous serial card
|
|
|
|
|
|
|
|
netdev= [NET] Network devices parameters
|
|
|
|
Format: <irq>,<io>,<mem_start>,<mem_end>,<name>
|
|
|
|
Note that mem_start is often overloaded to mean
|
|
|
|
something different and driver-specific.
|
2005-10-23 19:57:11 +00:00
|
|
|
This usage is only documented in each driver source
|
|
|
|
file if at all.
|
|
|
|
|
netfilter: accounting rework: ct_extend + 64bit counters (v4)
Initially netfilter has had 64bit counters for conntrack-based accounting, but
it was changed in 2.6.14 to save memory. Unfortunately in-kernel 64bit counters are
still required, for example for "connbytes" extension. However, 64bit counters
waste a lot of memory and it was not possible to enable/disable it runtime.
This patch:
- reimplements accounting with respect to the extension infrastructure,
- makes one global version of seq_print_acct() instead of two seq_print_counters(),
- makes it possible to enable it at boot time (for CONFIG_SYSCTL/CONFIG_SYSFS=n),
- makes it possible to enable/disable it at runtime by sysctl or sysfs,
- extends counters from 32bit to 64bit,
- renames ip_conntrack_counter -> nf_conn_counter,
- enables accounting code unconditionally (no longer depends on CONFIG_NF_CT_ACCT),
- set initial accounting enable state based on CONFIG_NF_CT_ACCT
- removes buggy IPCT_COUNTER_FILLING event handling.
If accounting is enabled newly created connections get additional acct extend.
Old connections are not changed as it is not possible to add a ct_extend area
to confirmed conntrack. Accounting is performed for all connections with
acct extend regardless of a current state of "net.netfilter.nf_conntrack_acct".
Signed-off-by: Krzysztof Piotr Oledzki <ole@ans.pl>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-21 17:01:34 +00:00
|
|
|
nf_conntrack.acct=
|
|
|
|
[NETFILTER] Enable connection tracking flow accounting
|
|
|
|
0 to disable accounting
|
|
|
|
1 to enable accounting
|
2010-06-25 12:46:56 +00:00
|
|
|
Default value is 0.
|
netfilter: accounting rework: ct_extend + 64bit counters (v4)
Initially netfilter has had 64bit counters for conntrack-based accounting, but
it was changed in 2.6.14 to save memory. Unfortunately in-kernel 64bit counters are
still required, for example for "connbytes" extension. However, 64bit counters
waste a lot of memory and it was not possible to enable/disable it runtime.
This patch:
- reimplements accounting with respect to the extension infrastructure,
- makes one global version of seq_print_acct() instead of two seq_print_counters(),
- makes it possible to enable it at boot time (for CONFIG_SYSCTL/CONFIG_SYSFS=n),
- makes it possible to enable/disable it at runtime by sysctl or sysfs,
- extends counters from 32bit to 64bit,
- renames ip_conntrack_counter -> nf_conn_counter,
- enables accounting code unconditionally (no longer depends on CONFIG_NF_CT_ACCT),
- set initial accounting enable state based on CONFIG_NF_CT_ACCT
- removes buggy IPCT_COUNTER_FILLING event handling.
If accounting is enabled newly created connections get additional acct extend.
Old connections are not changed as it is not possible to add a ct_extend area
to confirmed conntrack. Accounting is performed for all connections with
acct extend regardless of a current state of "net.netfilter.nf_conntrack_acct".
Signed-off-by: Krzysztof Piotr Oledzki <ole@ans.pl>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-21 17:01:34 +00:00
|
|
|
|
2010-09-17 14:54:37 +00:00
|
|
|
nfsaddrs= [NFS] Deprecated. Use ip= instead.
|
2009-10-27 18:41:35 +00:00
|
|
|
See Documentation/filesystems/nfs/nfsroot.txt.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
nfsroot= [NFS] nfs root filesystem for disk-less boxes.
|
2009-10-27 18:41:35 +00:00
|
|
|
See Documentation/filesystems/nfs/nfsroot.txt.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2010-09-17 14:54:37 +00:00
|
|
|
nfsrootdebug [NFS] enable nfsroot debugging messages.
|
|
|
|
See Documentation/filesystems/nfs/nfsroot.txt.
|
|
|
|
|
2006-01-03 08:55:41 +00:00
|
|
|
nfs.callback_tcpport=
|
|
|
|
[NFS] set the TCP port on which the NFSv4 callback
|
|
|
|
channel should listen.
|
|
|
|
|
2009-08-19 22:12:27 +00:00
|
|
|
nfs.cache_getent=
|
|
|
|
[NFS] sets the pathname to the program which is used
|
|
|
|
to update the NFS client cache entries.
|
|
|
|
|
|
|
|
nfs.cache_getent_timeout=
|
|
|
|
[NFS] sets the timeout after which an attempt to
|
|
|
|
update a cache entry is deemed to have failed.
|
|
|
|
|
2006-01-03 08:55:57 +00:00
|
|
|
nfs.idmap_cache_timeout=
|
|
|
|
[NFS] set the maximum lifetime for idmapper cache
|
|
|
|
entries.
|
|
|
|
|
2007-10-09 16:01:04 +00:00
|
|
|
nfs.enable_ino64=
|
|
|
|
[NFS] enable 64-bit inode numbers.
|
|
|
|
If zero, the NFS client will fake up a 32-bit inode
|
|
|
|
number for the readdir() and stat() syscalls instead
|
|
|
|
of returning the full 64-bit number.
|
|
|
|
The default is to return 64-bit inode numbers.
|
|
|
|
|
2011-02-22 23:44:32 +00:00
|
|
|
nfs.nfs4_disable_idmapping=
|
|
|
|
[NFSv4] When set, this option disables the NFSv4
|
|
|
|
idmapper on the client, but only if the mount
|
|
|
|
is using the 'sec=sys' security flavour. This may
|
|
|
|
make migration from legacy NFSv2/v3 systems easier
|
|
|
|
provided that the server has the appropriate support.
|
|
|
|
The default is to always enable NFSv4 idmapping.
|
|
|
|
|
2009-09-01 08:38:32 +00:00
|
|
|
nmi_debug= [KNL,AVR32,SH] Specify one or more actions to take
|
2007-10-10 12:58:29 +00:00
|
|
|
when a NMI is triggered.
|
|
|
|
Format: [state][,regs][,debounce][,die]
|
|
|
|
|
2009-04-14 08:33:43 +00:00
|
|
|
nmi_watchdog= [KNL,BUGS=X86] Debugging features for SMP kernels
|
2011-03-22 23:34:16 +00:00
|
|
|
Format: [panic,][nopanic,][num]
|
2010-11-29 22:07:17 +00:00
|
|
|
Valid num: 0
|
2008-11-01 15:06:51 +00:00
|
|
|
0 - turn nmi_watchdog off
|
2009-04-05 22:55:22 +00:00
|
|
|
When panic is specified, panic when an NMI watchdog
|
2011-03-22 23:34:16 +00:00
|
|
|
timeout occurs (or 'nopanic' to override the opposite
|
|
|
|
default).
|
2009-04-05 22:55:22 +00:00
|
|
|
This is useful when you use a panic=... timeout and
|
|
|
|
need the box quickly up again.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2009-07-08 18:10:56 +00:00
|
|
|
netpoll.carrier_timeout=
|
|
|
|
[NET] Specifies amount of time (in seconds) that
|
|
|
|
netpoll should wait for a carrier. By default netpoll
|
|
|
|
waits 4 seconds.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
no387 [BUGS=X86-32] Tells the kernel to use the 387 maths
|
2005-04-16 22:20:36 +00:00
|
|
|
emulation library even if a 387 maths coprocessor
|
|
|
|
is present.
|
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
no_console_suspend
|
|
|
|
[HW] Never suspend the console
|
|
|
|
Disable suspending of consoles during suspend and
|
|
|
|
hibernate operations. Once disabled, debugging
|
|
|
|
messages can reach various consoles while the rest
|
|
|
|
of the system is being put to sleep (ie, while
|
|
|
|
debugging driver suspend/resume hooks). This may
|
|
|
|
not work reliably with all consoles, but is known
|
|
|
|
to work with serial and VGA consoles.
|
|
|
|
|
2007-05-31 07:40:47 +00:00
|
|
|
noaliencache [MM, NUMA, SLAB] Disables the allocation of alien
|
|
|
|
caches in the slab allocator. Saves per-node memory,
|
|
|
|
but will impact performance.
|
2006-12-07 04:32:16 +00:00
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
noalign [KNL,ARM]
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
noapic [SMP,APIC] Tells the kernel to not make use of any
|
|
|
|
IOAPICs that may be present in the system.
|
|
|
|
|
sched: Add 'autogroup' scheduling feature: automated per session task groups
A recurring complaint from CFS users is that parallel kbuild has
a negative impact on desktop interactivity. This patch
implements an idea from Linus, to automatically create task
groups. Currently, only per session autogroups are implemented,
but the patch leaves the way open for enhancement.
Implementation: each task's signal struct contains an inherited
pointer to a refcounted autogroup struct containing a task group
pointer, the default for all tasks pointing to the
init_task_group. When a task calls setsid(), a new task group
is created, the process is moved into the new task group, and a
reference to the preveious task group is dropped. Child
processes inherit this task group thereafter, and increase it's
refcount. When the last thread of a process exits, the
process's reference is dropped, such that when the last process
referencing an autogroup exits, the autogroup is destroyed.
At runqueue selection time, IFF a task has no cgroup assignment,
its current autogroup is used.
Autogroup bandwidth is controllable via setting it's nice level
through the proc filesystem:
cat /proc/<pid>/autogroup
Displays the task's group and the group's nice level.
echo <nice level> > /proc/<pid>/autogroup
Sets the task group's shares to the weight of nice <level> task.
Setting nice level is rate limited for !admin users due to the
abuse risk of task group locking.
The feature is enabled from boot by default if
CONFIG_SCHED_AUTOGROUP=y is selected, but can be disabled via
the boot option noautogroup, and can also be turned on/off on
the fly via:
echo [01] > /proc/sys/kernel/sched_autogroup_enabled
... which will automatically move tasks to/from the root task group.
Signed-off-by: Mike Galbraith <efault@gmx.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Markus Trippelsdorf <markus@trippelsdorf.de>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Paul Turner <pjt@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
[ Removed the task_group_path() debug code, and fixed !EVENTFD build failure. ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
LKML-Reference: <1290281700.28711.9.camel@maggy.simson.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-11-30 13:18:03 +00:00
|
|
|
noautogroup Disable scheduler automatic task group creation.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
nobats [PPC] Do not use BATs for mapping kernel lowmem
|
|
|
|
on "Classic" PPC cores.
|
|
|
|
|
|
|
|
nocache [ARM]
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
noclflush [BUGS=X86] Don't use the CLFLUSH instruction
|
|
|
|
|
2006-07-30 10:03:11 +00:00
|
|
|
nodelayacct [KNL] Disable per-task delay accounting
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
nodisconnect [HW,SCSI,M68K] Disables SCSI disconnects.
|
|
|
|
|
2008-09-21 08:14:42 +00:00
|
|
|
nodsp [SH] Disable hardware DSP at boot time.
|
|
|
|
|
2009-04-14 08:33:43 +00:00
|
|
|
noefi [X86] Disable EFI runtime services support.
|
2008-01-30 12:32:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
noexec [IA-64]
|
|
|
|
|
2009-04-14 08:33:43 +00:00
|
|
|
noexec [X86]
|
2008-04-12 08:28:25 +00:00
|
|
|
On X86-32 available only on PAE configured kernels.
|
2005-04-16 22:20:36 +00:00
|
|
|
noexec=on: enable non-executable mappings (default)
|
2008-04-12 08:28:25 +00:00
|
|
|
noexec=off: disable non-executable mappings
|
|
|
|
|
2011-05-11 23:51:05 +00:00
|
|
|
nosmep [X86]
|
|
|
|
Disable SMEP (Supervisor Mode Execution Protection)
|
|
|
|
even if it is supported by processor.
|
|
|
|
|
2008-04-12 08:28:25 +00:00
|
|
|
noexec32 [X86-64]
|
|
|
|
This affects only 32-bit executables.
|
|
|
|
noexec32=on: enable non-executable mappings (default)
|
|
|
|
read doesn't imply executable mappings
|
|
|
|
noexec32=off: disable non-executable mappings
|
|
|
|
read implies executable mappings
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-09-21 08:14:42 +00:00
|
|
|
nofpu [SH] Disable hardware FPU at boot time.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
nofxsr [BUGS=X86-32] Disables x86 floating point extended
|
2006-03-23 10:59:34 +00:00
|
|
|
register save and restore. The kernel will only save
|
|
|
|
legacy floating-point registers on task switch.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2009-05-22 19:17:45 +00:00
|
|
|
noxsave [BUGS=X86] Disables x86 extended register state save
|
|
|
|
and restore using xsave. The kernel will fallback to
|
|
|
|
enabling legacy floating-point and sse state.
|
|
|
|
|
2009-03-31 12:55:44 +00:00
|
|
|
nohlt [BUGS=ARM,SH] Tells the kernel that the sleep(SH) or
|
|
|
|
wfi(ARM) instruction doesn't work correctly and not to
|
|
|
|
use it. This is also useful when using JTAG debugger.
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
no-hlt [BUGS=X86-32] Tells the kernel that the hlt
|
2005-04-16 22:20:36 +00:00
|
|
|
instruction doesn't work correctly and not to
|
|
|
|
use it.
|
|
|
|
|
file capabilities: add no_file_caps switch (v4)
Add a no_file_caps boot option when file capabilities are
compiled into the kernel (CONFIG_SECURITY_FILE_CAPABILITIES=y).
This allows distributions to ship a kernel with file capabilities
compiled in, without forcing users to use (and understand and
trust) them.
When no_file_caps is specified at boot, then when a process executes
a file, any file capabilities stored with that file will not be
used in the calculation of the process' new capability sets.
This means that booting with the no_file_caps boot option will
not be the same as booting a kernel with file capabilities
compiled out - in particular a task with CAP_SETPCAP will not
have any chance of passing capabilities to another task (which
isn't "really" possible anyway, and which may soon by killed
altogether by David Howells in any case), and it will instead
be able to put new capabilities in its pI. However since fI
will always be empty and pI is masked with fI, it gains the
task nothing.
We also support the extra prctl options, setting securebits and
dropping capabilities from the per-process bounding set.
The other remaining difference is that killpriv, task_setscheduler,
setioprio, and setnice will continue to be hooked. That will
be noticable in the case where a root task changed its uid
while keeping some caps, and another task owned by the new uid
tries to change settings for the more privileged task.
Changelog:
Nov 05 2008: (v4) trivial port on top of always-start-\
with-clear-caps patch
Sep 23 2008: nixed file_caps_enabled when file caps are
not compiled in as it isn't used.
Document no_file_caps in kernel-parameters.txt.
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Acked-by: Andrew G. Morgan <morgan@kernel.org>
Signed-off-by: James Morris <jmorris@namei.org>
2008-11-05 22:08:52 +00:00
|
|
|
no_file_caps Tells the kernel not to honor file capabilities. The
|
|
|
|
only way then for a file to be executed with privilege
|
|
|
|
is to be setuid root or executed by root.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
nohalt [IA-64] Tells the kernel not to use the power saving
|
|
|
|
function PAL_HALT_LIGHT when idle. This increases
|
|
|
|
power-consumption. On the positive side, it reduces
|
|
|
|
interrupt wake-up latency, which may improve performance
|
|
|
|
in certain environments such as networked servers or
|
|
|
|
real-time systems.
|
|
|
|
|
2007-02-16 09:28:03 +00:00
|
|
|
nohz= [KNL] Boottime enable/disable dynamic ticks
|
|
|
|
Valid arguments: on, off
|
|
|
|
Default: on
|
|
|
|
|
2009-04-02 03:31:16 +00:00
|
|
|
noiotrap [SH] Disables trapped I/O port accesses.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
noirqdebug [X86-32] Disables the code which attempts to detect and
|
2005-04-16 22:20:36 +00:00
|
|
|
disable unhandled interrupt sources.
|
|
|
|
|
2009-04-14 08:33:43 +00:00
|
|
|
no_timer_check [X86,APIC] Disables the code which tests for
|
2006-12-07 01:14:09 +00:00
|
|
|
broken timer IRQ sources.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
noisapnp [ISAPNP] Disables ISA PnP code.
|
|
|
|
|
|
|
|
noinitrd [RAM] Tells the kernel not to load any configured
|
|
|
|
initial RAM disk.
|
|
|
|
|
2009-04-17 08:42:15 +00:00
|
|
|
nointremap [X86-64, Intel-IOMMU] Do not enable interrupt
|
|
|
|
remapping.
|
2010-07-20 18:06:49 +00:00
|
|
|
[Deprecated - use intremap=off]
|
2009-04-17 08:42:15 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
nointroute [IA-64]
|
|
|
|
|
2011-08-13 19:34:52 +00:00
|
|
|
nojitter [IA-64] Disables jitter checking for ITC timers.
|
2007-07-20 18:22:30 +00:00
|
|
|
|
2010-08-16 15:51:20 +00:00
|
|
|
no-kvmclock [X86,KVM] Disable paravirtualized KVM clock driver
|
|
|
|
|
2010-10-14 09:22:51 +00:00
|
|
|
no-kvmapf [X86,KVM] Disable paravirtualized asynchronous page
|
|
|
|
fault handling.
|
|
|
|
|
2011-07-11 19:28:19 +00:00
|
|
|
no-steal-acc [X86,KVM] Disable paravirtualized steal time accounting.
|
|
|
|
steal time is computed, but won't influence scheduler
|
|
|
|
behaviour
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
nolapic [X86-32,APIC] Do not enable or use the local APIC.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
nolapic_timer [X86-32,APIC] Do not use the local APIC timer.
|
2007-03-22 08:11:21 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
noltlbs [PPC] Do not use large page/tlb entries for kernel
|
|
|
|
lowmem mapping on PPC40x.
|
|
|
|
|
2006-02-22 00:57:55 +00:00
|
|
|
nomca [IA-64] Disable machine check abort handling
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
nomce [X86-32] Machine Check Exception
|
2006-03-31 23:36:09 +00:00
|
|
|
|
2007-10-12 21:04:06 +00:00
|
|
|
nomfgpt [X86-32] Disable Multi-Function General Purpose
|
|
|
|
Timer usage (for AMD Geode machines).
|
|
|
|
|
2010-01-18 16:05:40 +00:00
|
|
|
nopat [X86] Disable PAT (page attribute table extension of
|
|
|
|
pagetables) support.
|
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
norandmaps Don't use address space randomization. Equivalent to
|
|
|
|
echo 0 > /proc/sys/kernel/randomize_va_space
|
|
|
|
|
2010-08-11 16:34:09 +00:00
|
|
|
noreplace-paravirt [X86,IA-64,PV_OPS] Don't patch paravirt_ops
|
2007-05-02 17:27:16 +00:00
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
noreplace-smp [X86-32,SMP] Don't replace SMP instructions
|
2007-05-02 17:27:13 +00:00
|
|
|
with UP alternatives
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
noresidual [PPC] Don't use residual data on PReP machines.
|
|
|
|
|
2011-07-31 21:02:19 +00:00
|
|
|
nordrand [X86] Disable the direct use of the RDRAND
|
|
|
|
instruction even if it is supported by the
|
|
|
|
processor. RDRAND is still available to user
|
|
|
|
space applications.
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
noresume [SWSUSP] Disables resume and restores original swap
|
|
|
|
space.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
no-scroll [VGA] Disables scrollback.
|
|
|
|
This is required for the Braillex ib80-piezo Braille
|
|
|
|
reader made by F.H. Papenmeier (Germany).
|
|
|
|
|
|
|
|
nosbagart [IA-64]
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
nosep [BUGS=X86-32] Disables x86 SYSENTER/SYSEXIT support.
|
2006-03-23 10:59:34 +00:00
|
|
|
|
2007-08-16 07:34:22 +00:00
|
|
|
nosmp [SMP] Tells an SMP kernel to act as a UP kernel,
|
|
|
|
and disable the IO APIC. legacy for "maxcpus=0".
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-07-16 06:41:05 +00:00
|
|
|
nosoftlockup [KNL] Disable the soft-lockup detector.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
nosync [HW,M68K] Disables sync negotiation for all devices.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
notsc [BUGS=X86-32] Disable Time Stamp Counter
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
nousb [USB] Disable the USB subsystem
|
|
|
|
|
2011-01-02 23:02:42 +00:00
|
|
|
nowatchdog [KNL] Disable the lockup detector (NMI watchdog).
|
2010-05-07 21:11:44 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
nowb [ARM]
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2009-04-17 08:42:12 +00:00
|
|
|
nox2apic [X86-64,APIC] Do not enable x2APIC mode.
|
|
|
|
|
2011-08-13 19:34:52 +00:00
|
|
|
nptcg= [IA-64] Override max number of concurrent global TLB
|
2008-03-14 20:57:08 +00:00
|
|
|
purges which is reported from either PAL_VM_SUMMARY or
|
|
|
|
SAL PALO.
|
|
|
|
|
2010-02-10 09:20:37 +00:00
|
|
|
nr_cpus= [SMP] Maximum number of processors that an SMP kernel
|
|
|
|
could support. nr_cpus=n : n >= 1 limits the kernel to
|
|
|
|
supporting 'n' processors. Later in runtime you can not
|
|
|
|
use hotplug cpu feature to put more cpu back to online.
|
|
|
|
just like you compile the kernel NR_CPUS=n
|
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
nr_uarts= [SERIAL] maximum number of UARTs to be registered.
|
|
|
|
|
2007-07-16 06:38:01 +00:00
|
|
|
numa_zonelist_order= [KNL, BOOT] Select zonelist order for NUMA.
|
|
|
|
one of ['zone', 'node', 'default'] can be specified
|
|
|
|
This can be set from sysctl after boot.
|
|
|
|
See Documentation/sysctl/vm.txt for details.
|
|
|
|
|
2009-01-06 22:42:44 +00:00
|
|
|
ohci1394_dma=early [HW] enable debugging via the ohci1394 driver.
|
|
|
|
See Documentation/debugging-via-ohci1394.txt for more
|
|
|
|
info.
|
|
|
|
|
2008-04-29 07:59:53 +00:00
|
|
|
olpc_ec_timeout= [OLPC] ms delay when issuing EC commands
|
|
|
|
Rather than timing out after 20 ms if an EC
|
|
|
|
command is not properly ACKed, override the length
|
|
|
|
of the timeout. We have interrupts disabled while
|
|
|
|
waiting for the ACK, so if this is set too high
|
|
|
|
interrupts *may* be lost!
|
|
|
|
|
2009-12-12 00:16:32 +00:00
|
|
|
omap_mux= [OMAP] Override bootloader pin multiplexing.
|
|
|
|
Format: <mux_mode0.mode_name=value>...
|
|
|
|
For example, to override I2C bus2:
|
|
|
|
omap_mux=i2c2_scl.i2c2_scl=0x100,i2c2_sda.i2c2_sda=0x100
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
oprofile.timer= [HW]
|
|
|
|
Use timer interrupt instead of performance counters
|
|
|
|
|
2009-05-06 10:10:23 +00:00
|
|
|
oprofile.cpu_type= Force an oprofile cpu type
|
|
|
|
This might be useful if you have an older oprofile
|
|
|
|
userland or if you want common events.
|
2009-06-23 09:48:14 +00:00
|
|
|
Format: { arch_perfmon }
|
|
|
|
arch_perfmon: [X86] Force use of architectural
|
2009-05-06 10:10:23 +00:00
|
|
|
perfmon on Intel CPUs instead of the
|
|
|
|
CPU specific event set.
|
2009-04-27 15:44:11 +00:00
|
|
|
|
2011-04-04 22:02:24 +00:00
|
|
|
oops=panic Always panic on oopses. Default is to just kill the
|
|
|
|
process, but there is a small probability of
|
|
|
|
deadlocking the machine.
|
2011-03-22 23:34:04 +00:00
|
|
|
This will also cause panics on machine check exceptions.
|
|
|
|
Useful together with panic=30 to trigger a reboot.
|
|
|
|
|
2010-06-08 00:10:38 +00:00
|
|
|
OSS [HW,OSS]
|
|
|
|
See Documentation/sound/oss/oss-parameters.txt
|
|
|
|
|
2011-04-04 22:02:24 +00:00
|
|
|
panic= [KNL] Kernel behaviour on panic: delay <timeout>
|
2011-07-26 23:08:52 +00:00
|
|
|
timeout > 0: seconds before rebooting
|
|
|
|
timeout = 0: wait forever
|
|
|
|
timeout < 0: reboot immediately
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: <timeout>
|
|
|
|
|
|
|
|
parkbd.port= [HW] Parallel port number the keyboard adapter is
|
|
|
|
connected to, default is 0.
|
|
|
|
Format: <parport#>
|
|
|
|
parkbd.mode= [HW] Parallel port keyboard adapter mode of operation,
|
|
|
|
0 for XT, 1 for AT (default is AT).
|
2005-10-23 19:57:11 +00:00
|
|
|
Format: <mode>
|
|
|
|
|
|
|
|
parport= [HW,PPT] Specify parallel ports. 0 disables.
|
|
|
|
Format: { 0 | auto | 0xBBB[,IRQ[,DMA]] }
|
|
|
|
Use 'auto' to force the driver to use any
|
|
|
|
IRQ/DMA settings detected (the default is to
|
|
|
|
ignore detected IRQ/DMA settings because of
|
|
|
|
possible conflicts). You can specify the base
|
|
|
|
address, IRQ, and DMA settings; IRQ and DMA
|
|
|
|
should be numbers, or 'auto' (for using detected
|
|
|
|
settings on that particular port), or 'nofifo'
|
|
|
|
(to avoid using a FIFO even if it is detected).
|
|
|
|
Parallel ports are assigned in the order they
|
|
|
|
are specified on the command line, starting
|
|
|
|
with parport0.
|
|
|
|
|
|
|
|
parport_init_mode= [HW,PPT]
|
|
|
|
Configure VIA parallel port to operate in
|
|
|
|
a specific mode. This is necessary on Pegasos
|
|
|
|
computer where firmware has no options for setting
|
|
|
|
up parallel port mode and sets it to spp.
|
|
|
|
Currently this function knows 686a and 8231 chips.
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: [spp|ps2|epp|ecp|ecpepp]
|
|
|
|
|
2006-03-23 11:00:57 +00:00
|
|
|
pause_on_oops=
|
|
|
|
Halt all CPUs after the first oops has been printed for
|
|
|
|
the specified number of seconds. This is to be used if
|
|
|
|
your oopses keep scrolling off the screen.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
pcbit= [HW,ISDN]
|
|
|
|
|
|
|
|
pcd. [PARIDE]
|
|
|
|
See header of drivers/block/paride/pcd.c.
|
2008-11-13 21:33:24 +00:00
|
|
|
See also Documentation/blockdev/paride.txt.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
pci=option[,option...] [PCI] various PCI subsystem options:
|
2009-01-14 17:04:36 +00:00
|
|
|
earlydump [X86] dump PCI config space before the kernel
|
|
|
|
changes anything
|
2008-08-22 07:53:39 +00:00
|
|
|
off [X86] don't probe for the PCI bus
|
2007-07-31 07:37:59 +00:00
|
|
|
bios [X86-32] force use of PCI BIOS, don't access
|
2005-10-23 19:57:11 +00:00
|
|
|
the hardware directly. Use this if your machine
|
|
|
|
has a non-standard PCI host bridge.
|
2007-07-31 07:37:59 +00:00
|
|
|
nobios [X86-32] disallow use of PCI BIOS, only direct
|
2005-10-23 19:57:11 +00:00
|
|
|
hardware access methods are allowed. Use this
|
|
|
|
if you experience crashes upon bootup and you
|
|
|
|
suspect they are caused by the BIOS.
|
2008-08-22 07:53:39 +00:00
|
|
|
conf1 [X86] Force use of PCI Configuration
|
2005-10-23 19:57:11 +00:00
|
|
|
Mechanism 1.
|
2008-08-22 07:53:39 +00:00
|
|
|
conf2 [X86] Force use of PCI Configuration
|
2005-10-23 19:57:11 +00:00
|
|
|
Mechanism 2.
|
2007-10-05 20:17:58 +00:00
|
|
|
noaer [PCIE] If the PCIEAER kernel config parameter is
|
|
|
|
enabled, this kernel boot option can be used to
|
|
|
|
disable the use of PCIE advanced error reporting.
|
2007-10-11 20:57:27 +00:00
|
|
|
nodomains [PCI] Disable support for multiple PCI
|
|
|
|
root domains (aka PCI segments, in ACPI-speak).
|
2009-04-14 08:33:43 +00:00
|
|
|
nommconf [X86] Disable use of MMCONFIG for PCI
|
2006-02-15 23:17:43 +00:00
|
|
|
Configuration
|
2009-06-07 14:15:16 +00:00
|
|
|
check_enable_amd_mmconf [X86] check for and enable
|
|
|
|
properly configured MMIO access to PCI
|
|
|
|
config space on AMD family 10h CPU
|
2006-03-06 05:33:34 +00:00
|
|
|
nomsi [MSI] If the PCI_MSI kernel config parameter is
|
|
|
|
enabled, this kernel boot option can be used to
|
|
|
|
disable the use of MSI interrupts system-wide.
|
2008-06-11 14:35:14 +00:00
|
|
|
noioapicquirk [APIC] Disable all boot interrupt quirks.
|
|
|
|
Safety option to keep boot IRQs enabled. This
|
|
|
|
should never be necessary.
|
2008-06-11 14:35:15 +00:00
|
|
|
ioapicreroute [APIC] Enable rerouting of boot IRQs to the
|
|
|
|
primary IO-APIC for bridges that cannot disable
|
|
|
|
boot IRQs. This fixes a source of spurious IRQs
|
|
|
|
when the system masks IRQs.
|
2008-07-15 11:48:55 +00:00
|
|
|
noioapicreroute [APIC] Disable workaround that uses the
|
|
|
|
boot IRQ equivalent of an IRQ that connects to
|
|
|
|
a chipset where boot IRQs cannot be disabled.
|
|
|
|
The opposite of ioapicreroute.
|
2007-07-31 07:37:59 +00:00
|
|
|
biosirq [X86-32] Use PCI BIOS calls to get the interrupt
|
2005-10-23 19:57:11 +00:00
|
|
|
routing table. These calls are known to be buggy
|
|
|
|
on several machines and they hang the machine
|
|
|
|
when used, but on other computers it's the only
|
|
|
|
way to get the interrupt routing table. Try
|
|
|
|
this option if the kernel is unable to allocate
|
|
|
|
IRQs or discover secondary PCI buses on your
|
|
|
|
motherboard.
|
2008-08-22 07:53:39 +00:00
|
|
|
rom [X86] Assign address space to expansion ROMs.
|
2005-10-23 19:57:11 +00:00
|
|
|
Use with caution as certain devices share
|
|
|
|
address decoders between ROMs and other
|
|
|
|
resources.
|
2008-08-22 07:53:39 +00:00
|
|
|
norom [X86] Do not assign address space to
|
2008-05-12 20:57:46 +00:00
|
|
|
expansion ROMs that do not already have
|
|
|
|
BIOS assigned address ranges.
|
2010-05-12 18:14:32 +00:00
|
|
|
nobar [X86] Do not assign address space to the
|
|
|
|
BARs that weren't assigned by the BIOS.
|
2008-08-22 07:53:39 +00:00
|
|
|
irqmask=0xMMMM [X86] Set a bit mask of IRQs allowed to be
|
2005-10-23 19:57:11 +00:00
|
|
|
assigned automatically to PCI devices. You can
|
|
|
|
make the kernel exclude IRQs of your ISA cards
|
|
|
|
this way.
|
2008-08-22 07:53:39 +00:00
|
|
|
pirqaddr=0xAAAAA [X86] Specify the physical address
|
2005-10-23 19:57:11 +00:00
|
|
|
of the PIRQ table (normally generated
|
|
|
|
by the BIOS) if it is outside the
|
|
|
|
F0000h-100000h range.
|
2008-08-22 07:53:39 +00:00
|
|
|
lastbus=N [X86] Scan all buses thru bus #N. Can be
|
2005-10-23 19:57:11 +00:00
|
|
|
useful if the kernel is unable to find your
|
|
|
|
secondary buses and you want to tell it
|
|
|
|
explicitly which ones they are.
|
2008-08-22 07:53:39 +00:00
|
|
|
assign-busses [X86] Always assign all PCI bus
|
2005-10-23 19:57:11 +00:00
|
|
|
numbers ourselves, overriding
|
|
|
|
whatever the firmware may have done.
|
2008-08-22 07:53:39 +00:00
|
|
|
usepirqmask [X86] Honor the possible IRQ mask stored
|
2005-10-23 19:57:11 +00:00
|
|
|
in the BIOS $PIR table. This is needed on
|
|
|
|
some systems with broken BIOSes, notably
|
|
|
|
some HP Pavilion N5400 and Omnibook XE3
|
|
|
|
notebooks. This will have no effect if ACPI
|
|
|
|
IRQ routing is enabled.
|
2008-08-22 07:53:39 +00:00
|
|
|
noacpi [X86] Do not use ACPI for IRQ routing
|
2005-10-23 19:57:11 +00:00
|
|
|
or for PCI scanning.
|
2010-02-23 17:24:41 +00:00
|
|
|
use_crs [X86] Use PCI host bridge window information
|
|
|
|
from ACPI. On BIOSes from 2008 or later, this
|
|
|
|
is enabled by default. If you need to use this,
|
|
|
|
please report a bug.
|
|
|
|
nocrs [X86] Ignore PCI host bridge windows from ACPI.
|
|
|
|
If you need to use this, please report a bug.
|
2005-10-23 19:57:11 +00:00
|
|
|
routeirq Do IRQ routing for all PCI devices.
|
|
|
|
This is normally done in pci_enable_device(),
|
|
|
|
so this option is a temporary workaround
|
|
|
|
for broken drivers that don't call it.
|
2008-03-27 08:31:18 +00:00
|
|
|
skip_isa_align [X86] do not align io start addr, so can
|
|
|
|
handle more pci cards
|
2005-10-23 19:57:11 +00:00
|
|
|
firmware [ARM] Do not re-enumerate the bus but instead
|
|
|
|
just use the configuration from the
|
|
|
|
bootloader. This is currently used on
|
|
|
|
IXP2000 systems where the bus has to be
|
|
|
|
configured a certain way for adjunct CPUs.
|
2006-09-26 08:52:41 +00:00
|
|
|
noearly [X86] Don't do any early type 1 scanning.
|
|
|
|
This might help on some broken boards which
|
|
|
|
machine check when some devices' config space
|
|
|
|
is read. But various workarounds are disabled
|
|
|
|
and some IOMMU drivers will not work.
|
PCI: optionally sort device lists breadth-first
Problem:
New Dell PowerEdge servers have 2 embedded ethernet ports, which are
labeled NIC1 and NIC2 on the chassis, in the BIOS setup screens, and
in the printed documentation. Assuming no other add-in ethernet ports
in the system, Linux 2.4 kernels name these eth0 and eth1
respectively. Many people have come to expect this naming. Linux 2.6
kernels name these eth1 and eth0 respectively (backwards from
expectations). I also have reports that various Sun and HP servers
have similar behavior.
Root cause:
Linux 2.4 kernels walk the pci_devices list, which happens to be
sorted in breadth-first order (or pcbios_find_device order on i386,
which most often is breadth-first also). 2.6 kernels have both the
pci_devices list and the pci_bus_type.klist_devices list, the latter
is what is walked at driver load time to match the pci_id tables; this
klist happens to be in depth-first order.
On systems where, for physical routing reasons, NIC1 appears on a
lower bus number than NIC2, but NIC2's bridge is discovered first in
the depth-first ordering, NIC2 will be discovered before NIC1. If the
list were sorted breadth-first, NIC1 would be discovered before NIC2.
A PowerEdge 1955 system has the following topology which easily
exhibits the difference between depth-first and breadth-first device
lists.
-[0000:00]-+-00.0 Intel Corporation 5000P Chipset Memory Controller Hub
+-02.0-[0000:03-08]--+-00.0-[0000:04-07]--+-00.0-[0000:05-06]----00.0-[0000:06]----00.0 Broadcom Corporation NetXtreme II BCM5708S Gigabit Ethernet (labeled NIC2, 2.4 kernel name eth1, 2.6 kernel name eth0)
+-1c.0-[0000:01-02]----00.0-[0000:02]----00.0 Broadcom Corporation NetXtreme II BCM5708S Gigabit Ethernet (labeled NIC1, 2.4 kernel name eth0, 2.6 kernel name eth1)
Other factors, such as device driver load order and the presence of
PCI slots at various points in the bus hierarchy further complicate
this problem; I'm not trying to solve those here, just restore the
device order, and thus basic behavior, that 2.4 kernels had.
Solution:
The solution can come in multiple steps.
Suggested fix #1: kernel
Patch below optionally sorts the two device lists into breadth-first
ordering to maintain compatibility with 2.4 kernels. It adds two new
command line options:
pci=bfsort
pci=nobfsort
to force the sort order, or not, as you wish. It also adds DMI checks
for the specific Dell systems which exhibit "backwards" ordering, to
make them "right".
Suggested fix #2: udev rules from userland
Many people also have the expectation that embedded NICs are always
discovered before add-in NICs (which this patch does not try to do).
Using the PCI IRQ Routing Table provided by system BIOS, it's easy to
determine which PCI devices are embedded, or if add-in, which PCI slot
they're in. I'm working on a tool that would allow udev to name
ethernet devices in ascending embedded, slot 1 .. slot N order,
subsort by PCI bus/dev/fn breadth-first. It'll be possible to use it
independent of udev as well for those distributions that don't use
udev in their installers.
Suggested fix #3: system board routing rules
One can constrain the system board layout to put NIC1 ahead of NIC2
regardless of breadth-first or depth-first discovery order. This adds
a significant level of complexity to board routing, and may not be
possible in all instances (witness the above systems from several
major manufacturers). I don't want to encourage this particular train
of thought too far, at the expense of not doing #1 or #2 above.
Feedback appreciated. Patch tested on a Dell PowerEdge 1955 blade
with 2.6.18.
You'll also note I took some liberty and temporarily break the klist
abstraction to simplify and speed up the sort algorithm. I think
that's both safe and appropriate in this instance.
Signed-off-by: Matt Domsch <Matt_Domsch@dell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-29 20:23:23 +00:00
|
|
|
bfsort Sort PCI devices into breadth-first order.
|
|
|
|
This sorting is done to get a device
|
|
|
|
order compatible with older (<= 2.4) kernels.
|
|
|
|
nobfsort Don't sort PCI devices into breadth-first order.
|
2007-02-06 00:36:06 +00:00
|
|
|
cbiosize=nn[KMG] The fixed amount of bus space which is
|
|
|
|
reserved for the CardBus bridge's IO window.
|
|
|
|
The default value is 256 bytes.
|
|
|
|
cbmemsize=nn[KMG] The fixed amount of bus space which is
|
|
|
|
reserved for the CardBus bridge's memory
|
|
|
|
window. The default value is 64 megabytes.
|
2009-03-16 08:13:39 +00:00
|
|
|
resource_alignment=
|
|
|
|
Format:
|
|
|
|
[<order of align>@][<domain>:]<bus>:<slot>.<func>[; ...]
|
|
|
|
Specifies alignment and device to reassign
|
|
|
|
aligned memory resources.
|
|
|
|
If <order of align> is not specified,
|
|
|
|
PAGE_SIZE is used as alignment.
|
|
|
|
PCI-PCI bridge can be specified, if resource
|
|
|
|
windows need to be expanded.
|
2009-04-22 22:52:09 +00:00
|
|
|
ecrc= Enable/disable PCIe ECRC (transaction layer
|
|
|
|
end-to-end CRC checking).
|
|
|
|
bios: Use BIOS/firmware settings. This is the
|
|
|
|
the default.
|
|
|
|
off: Turn ECRC off
|
|
|
|
on: Turn ECRC on.
|
2011-07-07 18:19:10 +00:00
|
|
|
realloc reallocate PCI resources if allocations done by BIOS
|
|
|
|
are erroneous.
|
PCI: optionally sort device lists breadth-first
Problem:
New Dell PowerEdge servers have 2 embedded ethernet ports, which are
labeled NIC1 and NIC2 on the chassis, in the BIOS setup screens, and
in the printed documentation. Assuming no other add-in ethernet ports
in the system, Linux 2.4 kernels name these eth0 and eth1
respectively. Many people have come to expect this naming. Linux 2.6
kernels name these eth1 and eth0 respectively (backwards from
expectations). I also have reports that various Sun and HP servers
have similar behavior.
Root cause:
Linux 2.4 kernels walk the pci_devices list, which happens to be
sorted in breadth-first order (or pcbios_find_device order on i386,
which most often is breadth-first also). 2.6 kernels have both the
pci_devices list and the pci_bus_type.klist_devices list, the latter
is what is walked at driver load time to match the pci_id tables; this
klist happens to be in depth-first order.
On systems where, for physical routing reasons, NIC1 appears on a
lower bus number than NIC2, but NIC2's bridge is discovered first in
the depth-first ordering, NIC2 will be discovered before NIC1. If the
list were sorted breadth-first, NIC1 would be discovered before NIC2.
A PowerEdge 1955 system has the following topology which easily
exhibits the difference between depth-first and breadth-first device
lists.
-[0000:00]-+-00.0 Intel Corporation 5000P Chipset Memory Controller Hub
+-02.0-[0000:03-08]--+-00.0-[0000:04-07]--+-00.0-[0000:05-06]----00.0-[0000:06]----00.0 Broadcom Corporation NetXtreme II BCM5708S Gigabit Ethernet (labeled NIC2, 2.4 kernel name eth1, 2.6 kernel name eth0)
+-1c.0-[0000:01-02]----00.0-[0000:02]----00.0 Broadcom Corporation NetXtreme II BCM5708S Gigabit Ethernet (labeled NIC1, 2.4 kernel name eth0, 2.6 kernel name eth1)
Other factors, such as device driver load order and the presence of
PCI slots at various points in the bus hierarchy further complicate
this problem; I'm not trying to solve those here, just restore the
device order, and thus basic behavior, that 2.4 kernels had.
Solution:
The solution can come in multiple steps.
Suggested fix #1: kernel
Patch below optionally sorts the two device lists into breadth-first
ordering to maintain compatibility with 2.4 kernels. It adds two new
command line options:
pci=bfsort
pci=nobfsort
to force the sort order, or not, as you wish. It also adds DMI checks
for the specific Dell systems which exhibit "backwards" ordering, to
make them "right".
Suggested fix #2: udev rules from userland
Many people also have the expectation that embedded NICs are always
discovered before add-in NICs (which this patch does not try to do).
Using the PCI IRQ Routing Table provided by system BIOS, it's easy to
determine which PCI devices are embedded, or if add-in, which PCI slot
they're in. I'm working on a tool that would allow udev to name
ethernet devices in ascending embedded, slot 1 .. slot N order,
subsort by PCI bus/dev/fn breadth-first. It'll be possible to use it
independent of udev as well for those distributions that don't use
udev in their installers.
Suggested fix #3: system board routing rules
One can constrain the system board layout to put NIC1 ahead of NIC2
regardless of breadth-first or depth-first discovery order. This adds
a significant level of complexity to board routing, and may not be
possible in all instances (witness the above systems from several
major manufacturers). I don't want to encourage this particular train
of thought too far, at the expense of not doing #1 or #2 above.
Feedback appreciated. Patch tested on a Dell PowerEdge 1955 blade
with 2.6.18.
You'll also note I took some liberty and temporarily break the klist
abstraction to simplify and speed up the sort algorithm. I think
that's both safe and appropriate in this instance.
Signed-off-by: Matt Domsch <Matt_Domsch@dell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-29 20:23:23 +00:00
|
|
|
|
2008-09-25 00:40:34 +00:00
|
|
|
pcie_aspm= [PCIE] Forcibly enable or disable PCIe Active State Power
|
|
|
|
Management.
|
|
|
|
off Disable ASPM.
|
|
|
|
force Enable ASPM even on devices that claim not to support it.
|
|
|
|
WARNING: Forcing ASPM on may cause system lockups.
|
|
|
|
|
2010-08-20 23:51:44 +00:00
|
|
|
pcie_ports= [PCIE] PCIe ports handling:
|
PCI: PCIe: Ask BIOS for control of all native services at once
After commit 852972acff8f10f3a15679be2059bb94916cba5d (ACPI: Disable
ASPM if the platform won't provide _OSC control for PCIe) control of
the PCIe Capability Structure is unconditionally requested by
acpi_pci_root_add(), which in principle may cause problems to
happen in two ways. First, the BIOS may refuse to give control of
the PCIe Capability Structure if it is not asked for any of the
_OSC features depending on it at the same time. Second, the BIOS may
assume that control of the _OSC features depending on the PCIe
Capability Structure will be requested in the future and may behave
incorrectly if that doesn't happen. For this reason, control of
the PCIe Capability Structure should always be requested along with
control of any other _OSC features that may depend on it (ie. PCIe
native PME, PCIe native hot-plug, PCIe AER).
Rework the PCIe port driver so that (1) it checks which native PCIe
port services can be enabled, according to the BIOS, and (2) it
requests control of all these services simultaneously. In
particular, this causes pcie_portdrv_probe() to fail if the BIOS
refuses to grant control of the PCIe Capability Structure, which
means that no native PCIe port services can be enabled for the PCIe
Root Complex the given port belongs to. If that happens, ASPM is
disabled to avoid problems with mishandling it by the part of the
PCIe hierarchy for which control of the PCIe Capability Structure
has not been received.
Make it possible to override this behavior using 'pcie_ports=native'
(use the PCIe native services regardless of the BIOS response to the
control request), or 'pcie_ports=compat' (do not use the PCIe native
services at all).
Accordingly, rework the existing PCIe port service drivers so that
they don't request control of the services directly.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-08-21 20:02:38 +00:00
|
|
|
auto Ask the BIOS whether or not to use native PCIe services
|
|
|
|
associated with PCIe ports (PME, hot-plug, AER). Use
|
|
|
|
them only if that is allowed by the BIOS.
|
|
|
|
native Use native PCIe services associated with PCIe ports
|
|
|
|
unconditionally.
|
2010-08-20 23:51:44 +00:00
|
|
|
compat Treat PCIe ports as PCI-to-PCI bridges, disable the PCIe
|
|
|
|
ports driver.
|
|
|
|
|
2010-02-17 22:39:08 +00:00
|
|
|
pcie_pme= [PCIE,PM] Native PCIe PME signaling options:
|
2010-02-17 22:40:07 +00:00
|
|
|
nomsi Do not use MSI for native PCIe PME signaling (this makes
|
PCI: PCIe: Ask BIOS for control of all native services at once
After commit 852972acff8f10f3a15679be2059bb94916cba5d (ACPI: Disable
ASPM if the platform won't provide _OSC control for PCIe) control of
the PCIe Capability Structure is unconditionally requested by
acpi_pci_root_add(), which in principle may cause problems to
happen in two ways. First, the BIOS may refuse to give control of
the PCIe Capability Structure if it is not asked for any of the
_OSC features depending on it at the same time. Second, the BIOS may
assume that control of the _OSC features depending on the PCIe
Capability Structure will be requested in the future and may behave
incorrectly if that doesn't happen. For this reason, control of
the PCIe Capability Structure should always be requested along with
control of any other _OSC features that may depend on it (ie. PCIe
native PME, PCIe native hot-plug, PCIe AER).
Rework the PCIe port driver so that (1) it checks which native PCIe
port services can be enabled, according to the BIOS, and (2) it
requests control of all these services simultaneously. In
particular, this causes pcie_portdrv_probe() to fail if the BIOS
refuses to grant control of the PCIe Capability Structure, which
means that no native PCIe port services can be enabled for the PCIe
Root Complex the given port belongs to. If that happens, ASPM is
disabled to avoid problems with mishandling it by the part of the
PCIe hierarchy for which control of the PCIe Capability Structure
has not been received.
Make it possible to override this behavior using 'pcie_ports=native'
(use the PCIe native services regardless of the BIOS response to the
control request), or 'pcie_ports=compat' (do not use the PCIe native
services at all).
Accordingly, rework the existing PCIe port service drivers so that
they don't request control of the services directly.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-08-21 20:02:38 +00:00
|
|
|
all PCIe root ports use INTx for all services).
|
2010-02-17 22:39:08 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
pcmv= [HW,PCMCIA] BadgePAD 4
|
|
|
|
|
|
|
|
pd. [PARIDE]
|
2008-11-13 21:33:24 +00:00
|
|
|
See Documentation/blockdev/paride.txt.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
pdcchassis= [PARISC,HW] Disable/Enable PDC Chassis Status codes at
|
|
|
|
boot time.
|
|
|
|
Format: { 0 | 1 }
|
|
|
|
See arch/parisc/kernel/pdc_chassis.c
|
|
|
|
|
2009-08-14 06:00:50 +00:00
|
|
|
percpu_alloc= Select which percpu first chunk allocator to use.
|
2009-08-14 06:00:53 +00:00
|
|
|
Currently supported values are "embed" and "page".
|
|
|
|
Archs may support subset or none of the selections.
|
|
|
|
See comments in mm/percpu.c for details on each
|
|
|
|
allocator. This parameter is primarily for debugging
|
|
|
|
and performance comparison.
|
2009-06-22 02:56:24 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
pf. [PARIDE]
|
2008-11-13 21:33:24 +00:00
|
|
|
See Documentation/blockdev/paride.txt.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
pg. [PARIDE]
|
2008-11-13 21:33:24 +00:00
|
|
|
See Documentation/blockdev/paride.txt.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
pirq= [SMP,APIC] Manual mp-table setup
|
2008-10-20 16:32:21 +00:00
|
|
|
See Documentation/x86/i386/IO-APIC.txt.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
plip= [PPT,NET] Parallel port network link
|
|
|
|
Format: { parport<nr> | timid | 0 }
|
|
|
|
See also Documentation/parport.txt.
|
|
|
|
|
2011-08-13 19:34:52 +00:00
|
|
|
pmtmr= [X86] Manual setup of pmtmr I/O Port.
|
2008-07-12 03:33:30 +00:00
|
|
|
Override pmtimer IOPort with a hex value.
|
|
|
|
e.g. pmtmr=0x508
|
|
|
|
|
2011-08-11 18:14:05 +00:00
|
|
|
pnp.debug=1 [PNP]
|
|
|
|
Enable PNP debug messages (depends on the
|
|
|
|
CONFIG_PNP_DEBUG_MESSAGES option). Change at run-time
|
|
|
|
via /sys/module/pnp/parameters/debug. We always show
|
|
|
|
current resource usage; turning this on also shows
|
|
|
|
possible settings and some assignment information.
|
2008-08-19 22:53:41 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
pnpacpi= [ACPI]
|
|
|
|
{ off }
|
|
|
|
|
|
|
|
pnpbios= [ISAPNP]
|
|
|
|
{ on | off | curr | res | no-curr | no-res }
|
|
|
|
|
|
|
|
pnp_reserve_irq=
|
|
|
|
[ISAPNP] Exclude IRQs for the autoconfiguration
|
|
|
|
|
|
|
|
pnp_reserve_dma=
|
|
|
|
[ISAPNP] Exclude DMAs for the autoconfiguration
|
|
|
|
|
|
|
|
pnp_reserve_io= [ISAPNP] Exclude I/O ports for the autoconfiguration
|
2005-10-23 19:57:11 +00:00
|
|
|
Ranges are in pairs (I/O port base and size).
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
pnp_reserve_mem=
|
2005-10-23 19:57:11 +00:00
|
|
|
[ISAPNP] Exclude memory regions for the
|
|
|
|
autoconfiguration.
|
2005-04-16 22:20:36 +00:00
|
|
|
Ranges are in pairs (memory base and size).
|
|
|
|
|
2009-04-18 01:30:28 +00:00
|
|
|
ports= [IP_VS_FTP] IPVS ftp helper module
|
|
|
|
Default is 21.
|
|
|
|
Up to 8 (IP_VS_APP_MAX_PORTS) ports
|
|
|
|
may be specified.
|
|
|
|
Format: <port>,<port>....
|
|
|
|
|
2007-07-16 06:40:10 +00:00
|
|
|
print-fatal-signals=
|
|
|
|
[KNL] debug: print fatal signals
|
2009-11-08 15:46:42 +00:00
|
|
|
|
|
|
|
If enabled, warn about various signal handling
|
|
|
|
related application anomalies: too many signals,
|
|
|
|
too many POSIX.1 timers, fatal signals causing a
|
|
|
|
coredump - etc.
|
|
|
|
|
|
|
|
If you hit the warning due to signal overflow,
|
|
|
|
you might want to try "ulimit -i unlimited".
|
|
|
|
|
2007-07-16 06:40:10 +00:00
|
|
|
default: off.
|
|
|
|
|
2007-07-16 06:40:25 +00:00
|
|
|
printk.time= Show timing data prefixed to each printk message line
|
|
|
|
Format: <bool> (1/Y/y=enable, 0/N/n=disable)
|
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
processor.max_cstate= [HW,ACPI]
|
|
|
|
Limit processor to maximum C-state
|
|
|
|
max_cstate=9 overrides any DMI blacklist limit.
|
|
|
|
|
|
|
|
processor.nocst [HW,ACPI]
|
|
|
|
Ignore the _CST method to determine C-states,
|
|
|
|
instead using the legacy FADT method
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
profile= [KNL] Enable kernel profiling via /proc/profile
|
2005-10-23 19:57:11 +00:00
|
|
|
Format: [schedule,]<number>
|
|
|
|
Param: "schedule" - profile schedule points.
|
|
|
|
Param: <number> - step/bucket size as a power of 2 for
|
|
|
|
statistical time based profiling.
|
2007-10-24 16:23:50 +00:00
|
|
|
Param: "sleep" - profile D-state sleeping (millisecs).
|
|
|
|
Requires CONFIG_SCHEDSTATS
|
2007-10-20 01:08:22 +00:00
|
|
|
Param: "kvm" - profile VM exits.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
prompt_ramdisk= [RAM] List of RAM disks to prompt for floppy disk
|
|
|
|
before loading.
|
2008-11-13 21:33:24 +00:00
|
|
|
See Documentation/blockdev/ramdisk.txt.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
psmouse.proto= [HW,MOUSE] Highest PS2 mouse protocol extension to
|
|
|
|
probe for; one of (bare|imps|exps|lifebook|any).
|
2005-04-16 22:20:36 +00:00
|
|
|
psmouse.rate= [HW,MOUSE] Set desired mouse report rate, in reports
|
|
|
|
per second.
|
2005-10-23 19:57:11 +00:00
|
|
|
psmouse.resetafter= [HW,MOUSE]
|
|
|
|
Try to reset the device after so many bad packets
|
2005-04-16 22:20:36 +00:00
|
|
|
(0 = never).
|
|
|
|
psmouse.resolution=
|
|
|
|
[HW,MOUSE] Set desired mouse resolution, in dpi.
|
|
|
|
psmouse.smartscroll=
|
2005-10-23 19:57:11 +00:00
|
|
|
[HW,MOUSE] Controls Logitech smartscroll autorepeat.
|
2005-04-16 22:20:36 +00:00
|
|
|
0 = disabled, 1 = enabled (default).
|
|
|
|
|
2011-07-21 20:57:55 +00:00
|
|
|
pstore.backend= Specify the name of the pstore backend to use
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
pt. [PARIDE]
|
2008-11-13 21:33:24 +00:00
|
|
|
See Documentation/blockdev/paride.txt.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-08-15 10:25:38 +00:00
|
|
|
pty.legacy_count=
|
|
|
|
[KNL] Number of legacy pty's. Overwrites compiled-in
|
|
|
|
default number.
|
|
|
|
|
2006-09-29 09:01:02 +00:00
|
|
|
quiet [KNL] Disable most log messages
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
r128= [HW,DRM]
|
|
|
|
|
|
|
|
raid= [HW,RAID]
|
|
|
|
See Documentation/md.txt.
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
ramdisk_blocksize= [RAM]
|
2008-11-13 21:33:24 +00:00
|
|
|
See Documentation/blockdev/ramdisk.txt.
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
ramdisk_size= [RAM] Sizes of RAM disks in kilobytes
|
2008-11-13 21:33:24 +00:00
|
|
|
See Documentation/blockdev/ramdisk.txt.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-02-03 13:20:26 +00:00
|
|
|
rcupdate.blimit= [KNL,BOOT]
|
|
|
|
Set maximum number of finished RCU callbacks to process
|
|
|
|
in one batch.
|
2006-03-08 05:55:33 +00:00
|
|
|
|
2008-02-03 13:20:26 +00:00
|
|
|
rcupdate.qhimark= [KNL,BOOT]
|
|
|
|
Set threshold of queued
|
2006-03-08 05:55:33 +00:00
|
|
|
RCU callbacks over which batch limiting is disabled.
|
|
|
|
|
2008-02-03 13:20:26 +00:00
|
|
|
rcupdate.qlowmark= [KNL,BOOT]
|
|
|
|
Set threshold of queued RCU callbacks below which
|
|
|
|
batch limiting is re-enabled.
|
2006-03-08 05:55:33 +00:00
|
|
|
|
2005-09-06 22:17:19 +00:00
|
|
|
rdinit= [KNL]
|
|
|
|
Format: <full_path>
|
|
|
|
Run specified binary instead of /init from the ramdisk,
|
|
|
|
used for early userspace startup. See initrd.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
reboot= [BUGS=X86-32,BUGS=ARM,BUGS=IA-64] Rebooting mode
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: <reboot_mode>[,<reboot_mode2>[,...]]
|
2009-01-06 22:42:44 +00:00
|
|
|
See arch/*/kernel/reboot.c or arch/*/kernel/process.c
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-07-04 17:00:09 +00:00
|
|
|
relax_domain_level=
|
|
|
|
[KNL, SMP] Set scheduler's default relax_domain_level.
|
2009-02-04 09:12:08 +00:00
|
|
|
See Documentation/cgroups/cpusets.txt.
|
2008-07-04 17:00:09 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
reserve= [KNL,BUGS] Force the kernel to ignore some iomem area
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
reservetop= [X86-32]
|
2006-09-26 06:32:25 +00:00
|
|
|
Format: nn[KMG]
|
|
|
|
Reserves a hole at the top of the kernel virtual
|
|
|
|
address space.
|
|
|
|
|
2010-08-25 23:38:20 +00:00
|
|
|
reservelow= [X86]
|
|
|
|
Format: nn[K]
|
|
|
|
Set the amount of memory to reserve for BIOS at
|
|
|
|
the bottom of the address space.
|
|
|
|
|
2006-09-27 08:50:44 +00:00
|
|
|
reset_devices [KNL] Force drivers to reset the underlying device
|
|
|
|
during initialization.
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
resume= [SWSUSP]
|
|
|
|
Specify the partition device for software suspend
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-12-07 04:34:13 +00:00
|
|
|
resume_offset= [SWSUSP]
|
|
|
|
Specify the offset from the beginning of the partition
|
|
|
|
given by "resume=" at which the swap header is located,
|
|
|
|
in <PAGE_SIZE> units (needed only for swap files).
|
|
|
|
See Documentation/power/swsusp-and-swap-files.txt
|
|
|
|
|
2011-10-10 21:38:41 +00:00
|
|
|
resumedelay= [HIBERNATION] Delay (in seconds) to pause before attempting to
|
|
|
|
read the resume files
|
|
|
|
|
2011-10-06 18:34:46 +00:00
|
|
|
resumewait [HIBERNATION] Wait (indefinitely) for resume device to show up.
|
|
|
|
Useful for devices that are detected asynchronously
|
|
|
|
(e.g. USB and MMC devices).
|
|
|
|
|
2010-09-09 21:06:23 +00:00
|
|
|
hibernate= [HIBERNATION]
|
|
|
|
noresume Don't check if there's a hibernation image
|
|
|
|
present during boot.
|
|
|
|
nocompress Don't compress/decompress hibernation images.
|
|
|
|
|
2007-02-10 09:44:33 +00:00
|
|
|
retain_initrd [RAM] Keep initrd memory after extraction
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
rhash_entries= [KNL,NET]
|
|
|
|
Set number of hash buckets for route cache
|
|
|
|
|
|
|
|
riscom8= [HW,SERIAL]
|
|
|
|
Format: <io_board1>[,<io_board2>[,...<io_boardN>]]
|
|
|
|
|
|
|
|
ro [KNL] Mount root device read-only on boot
|
|
|
|
|
|
|
|
root= [KNL] Root filesystem
|
2011-08-03 23:21:08 +00:00
|
|
|
See name_to_dev_t comment in init/do_mounts.c.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
rootdelay= [KNL] Delay (in seconds) to pause before attempting to
|
|
|
|
mount the root filesystem
|
|
|
|
|
|
|
|
rootflags= [KNL] Set root filesystem mount option string
|
|
|
|
|
|
|
|
rootfstype= [KNL] Set root filesystem type
|
|
|
|
|
2007-07-16 06:40:35 +00:00
|
|
|
rootwait [KNL] Wait (indefinitely) for root device to show up.
|
|
|
|
Useful for devices that are detected asynchronously
|
|
|
|
(e.g. USB and MMC devices).
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
rw [KNL] Mount root device read-write on boot
|
|
|
|
|
|
|
|
S [KNL] Run init in single mode
|
|
|
|
|
|
|
|
sa1100ir [NET]
|
|
|
|
See drivers/net/irda/sa1100_ir.c.
|
|
|
|
|
|
|
|
sbni= [NET] Granch SBNI12 leased line adapter
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2009-11-18 00:22:15 +00:00
|
|
|
sched_debug [KNL] Enables verbose scheduler debug messages.
|
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
security= [SECURITY] Choose a security module to enable at boot.
|
|
|
|
If this boot parameter is not specified, only the first
|
|
|
|
security module asking for security registration will be
|
|
|
|
loaded. An invalid security module name will be treated
|
|
|
|
as if no module has been chosen.
|
|
|
|
|
|
|
|
selinux= [SELINUX] Disable or enable SELinux at boot time.
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: { "0" | "1" }
|
|
|
|
See security/selinux/Kconfig help text.
|
|
|
|
0 -- disable.
|
|
|
|
1 -- enable.
|
|
|
|
Default value is set via kernel config option.
|
|
|
|
If enabled at boot time, /selinux/disable can be used
|
|
|
|
later to disable prior to initial policy load.
|
|
|
|
|
2010-07-29 21:48:09 +00:00
|
|
|
apparmor= [APPARMOR] Disable or enable AppArmor at boot time
|
|
|
|
Format: { "0" | "1" }
|
|
|
|
See security/apparmor/Kconfig help text
|
|
|
|
0 -- disable.
|
|
|
|
1 -- enable.
|
|
|
|
Default value is set via kernel config option.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
serialnumber [BUGS=X86-32]
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
shapers= [NET]
|
|
|
|
Maximal number of shapers.
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2008-08-22 08:32:50 +00:00
|
|
|
show_msr= [x86] show boot-time MSR settings
|
|
|
|
Format: { <integer> }
|
|
|
|
Show boot-time (BIOS-initialized) MSR settings.
|
|
|
|
The parameter means the number of CPUs to show,
|
|
|
|
for example 1 means boot CPU only.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
simeth= [IA-64]
|
|
|
|
simscsi=
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
slram= [HW,MTD]
|
|
|
|
|
2007-07-16 06:38:14 +00:00
|
|
|
slub_debug[=options[,slabs]] [MM, SLUB]
|
|
|
|
Enabling slub_debug allows one to determine the
|
|
|
|
culprit if slab objects become corrupted. Enabling
|
|
|
|
slub_debug can create guard zones around objects and
|
|
|
|
may poison objects when not in use. Also tracks the
|
|
|
|
last alloc / free. For more information see
|
|
|
|
Documentation/vm/slub.txt.
|
2007-05-31 07:40:47 +00:00
|
|
|
|
|
|
|
slub_max_order= [MM, SLUB]
|
2007-07-16 06:38:14 +00:00
|
|
|
Determines the maximum allowed order for slabs.
|
|
|
|
A high setting may cause OOMs due to memory
|
|
|
|
fragmentation. For more information see
|
|
|
|
Documentation/vm/slub.txt.
|
2007-05-31 07:40:47 +00:00
|
|
|
|
|
|
|
slub_min_objects= [MM, SLUB]
|
2007-07-16 06:38:14 +00:00
|
|
|
The minimum number of objects per slab. SLUB will
|
|
|
|
increase the slab order up to slub_max_order to
|
|
|
|
generate a sufficiently large slab able to contain
|
|
|
|
the number of objects indicated. The higher the number
|
|
|
|
of objects the smaller the overhead of tracking slabs
|
|
|
|
and the less frequently locks need to be acquired.
|
2007-05-31 07:40:47 +00:00
|
|
|
For more information see Documentation/vm/slub.txt.
|
|
|
|
|
|
|
|
slub_min_order= [MM, SLUB]
|
|
|
|
Determines the mininum page order for slabs. Must be
|
2007-07-16 06:38:14 +00:00
|
|
|
lower than slub_max_order.
|
2007-05-31 07:40:47 +00:00
|
|
|
For more information see Documentation/vm/slub.txt.
|
|
|
|
|
|
|
|
slub_nomerge [MM, SLUB]
|
2007-07-16 06:38:14 +00:00
|
|
|
Disable merging of slabs with similar size. May be
|
2007-05-31 07:40:47 +00:00
|
|
|
necessary if there is some reason to distinguish
|
2007-07-16 06:38:14 +00:00
|
|
|
allocs to different slabs. Debug options disable
|
|
|
|
merging on their own.
|
2007-05-31 07:40:47 +00:00
|
|
|
For more information see Documentation/vm/slub.txt.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
smart2= [HW]
|
|
|
|
Format: <io1>[,<io2>[,...,<io8>]]
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
smp-alt-once [X86-32,SMP] On a hotplug CPU system, only
|
2007-05-02 17:27:13 +00:00
|
|
|
attempt to substitute SMP alternatives once at boot.
|
|
|
|
|
2007-05-08 07:36:05 +00:00
|
|
|
smsc-ircc2.nopnp [HW] Don't use PNP to discover SMC devices
|
|
|
|
smsc-ircc2.ircc_cfg= [HW] Device configuration I/O port
|
|
|
|
smsc-ircc2.ircc_sir= [HW] SIR base I/O port
|
|
|
|
smsc-ircc2.ircc_fir= [HW] FIR base I/O port
|
|
|
|
smsc-ircc2.ircc_irq= [HW] IRQ line
|
|
|
|
smsc-ircc2.ircc_dma= [HW] DMA channel
|
|
|
|
smsc-ircc2.ircc_transceiver= [HW] Transceiver type:
|
|
|
|
0: Toshiba Satellite 1800 (GP data pin select)
|
|
|
|
1: Fast pin select (default)
|
|
|
|
2: ATC IRMode
|
|
|
|
|
2008-05-12 19:21:04 +00:00
|
|
|
softlockup_panic=
|
|
|
|
[KNL] Should the soft-lockup detector generate panics.
|
2011-04-04 22:02:24 +00:00
|
|
|
Format: <integer>
|
2008-05-12 19:21:04 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
sonypi.*= [HW] Sony Programmable I/O Control Device driver
|
2011-08-15 00:02:26 +00:00
|
|
|
See Documentation/laptops/sonypi.txt
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
specialix= [HW,SERIAL] Specialix multi-serial port adapter
|
2008-11-13 21:33:24 +00:00
|
|
|
See Documentation/serial/specialix.txt.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
spia_io_base= [HW,MTD]
|
|
|
|
spia_fio_base=
|
|
|
|
spia_pedr=
|
|
|
|
spia_peddr=
|
|
|
|
|
2008-12-17 04:06:40 +00:00
|
|
|
stacktrace [FTRACE]
|
|
|
|
Enabled the stack tracer on boot up.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
sti= [PARISC,HW]
|
|
|
|
Format: <num>
|
|
|
|
Set the STI (builtin display/keyboard on the HP-PARISC
|
|
|
|
machines) console (graphic card) which should be used
|
|
|
|
as the initial boot-console.
|
|
|
|
See also comment in drivers/video/console/sticore.c.
|
|
|
|
|
|
|
|
sti_font= [HW]
|
|
|
|
See comment in drivers/video/console/sticore.c.
|
|
|
|
|
|
|
|
stifb= [HW]
|
|
|
|
Format: bpp:<bpp1>[:<bpp2>[:<bpp3>...]]
|
|
|
|
|
2009-08-09 19:06:19 +00:00
|
|
|
sunrpc.min_resvport=
|
|
|
|
sunrpc.max_resvport=
|
|
|
|
[NFS,SUNRPC]
|
|
|
|
SunRPC servers often require that client requests
|
|
|
|
originate from a privileged port (i.e. a port in the
|
|
|
|
range 0 < portnr < 1024).
|
|
|
|
An administrator who wishes to reserve some of these
|
|
|
|
ports for other uses may adjust the range that the
|
|
|
|
kernel's sunrpc client considers to be privileged
|
|
|
|
using these two parameters to set the minimum and
|
|
|
|
maximum port values.
|
|
|
|
|
2007-03-06 09:42:23 +00:00
|
|
|
sunrpc.pool_mode=
|
|
|
|
[NFS]
|
|
|
|
Control how the NFS server code allocates CPUs to
|
|
|
|
service thread pools. Depending on how many NICs
|
|
|
|
you have and where their interrupts are bound, this
|
|
|
|
option will affect which CPUs will do NFS serving.
|
|
|
|
Note: this parameter cannot be changed while the
|
|
|
|
NFS server is running.
|
|
|
|
|
|
|
|
auto the server chooses an appropriate mode
|
|
|
|
automatically using heuristics
|
|
|
|
global a single global pool contains all CPUs
|
|
|
|
percpu one pool for each CPU
|
|
|
|
pernode one pool for each NUMA node (equivalent
|
|
|
|
to global on non-NUMA machines)
|
|
|
|
|
2009-08-09 19:06:19 +00:00
|
|
|
sunrpc.tcp_slot_table_entries=
|
|
|
|
sunrpc.udp_slot_table_entries=
|
|
|
|
[NFS,SUNRPC]
|
|
|
|
Sets the upper limit on the number of simultaneous
|
|
|
|
RPC calls that can be sent from the client to a
|
|
|
|
server. Increasing these values may allow you to
|
|
|
|
improve throughput, but will also increase the
|
|
|
|
amount of memory reserved for use by the client.
|
|
|
|
|
2010-11-24 20:57:08 +00:00
|
|
|
swapaccount[=0|1]
|
|
|
|
[KNL] Enable accounting of swap in memory resource
|
|
|
|
controller if no parameter or 1 is given or disable
|
|
|
|
it if 0 is given (See Documentation/cgroups/memory.txt)
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
swiotlb= [IA-64] Number of I/O TLB slabs
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
switches= [HW,M68k]
|
|
|
|
|
2010-09-08 14:54:17 +00:00
|
|
|
sysfs.deprecated=0|1 [KNL]
|
|
|
|
Enable/disable old style sysfs layout for old udev
|
|
|
|
on older distributions. When this option is enabled
|
|
|
|
very new udev will not work anymore. When this option
|
|
|
|
is disabled (or CONFIG_SYSFS_DEPRECATED not compiled)
|
|
|
|
in older udev will not work anymore.
|
|
|
|
Default depends on CONFIG_SYSFS_DEPRECATED_V2 set in
|
|
|
|
the kernel configuration.
|
|
|
|
|
2006-12-13 08:34:36 +00:00
|
|
|
sysrq_always_enabled
|
|
|
|
[KNL]
|
|
|
|
Ignore sysrq setting - this boot parameter will
|
|
|
|
neutralize any effect of /proc/sys/kernel/sysrq.
|
|
|
|
Useful for debugging.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
tdfx= [HW,DRM]
|
|
|
|
|
2008-07-24 04:28:33 +00:00
|
|
|
test_suspend= [SUSPEND]
|
|
|
|
Specify "mem" (for Suspend-to-RAM) or "standby" (for
|
|
|
|
standby suspend) as the system sleep state to briefly
|
|
|
|
enter during system startup. The system is woken from
|
|
|
|
this state using a wakeup-capable RTC alarm.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
thash_entries= [KNL,NET]
|
|
|
|
Set number of hash buckets for TCP connection
|
|
|
|
|
2007-08-12 04:12:54 +00:00
|
|
|
thermal.act= [HW,ACPI]
|
|
|
|
-1: disable all active trip points in all thermal zones
|
|
|
|
<degrees C>: override all lowest active trip points
|
|
|
|
|
2007-08-14 19:49:32 +00:00
|
|
|
thermal.crt= [HW,ACPI]
|
|
|
|
-1: disable all critical trip points in all thermal zones
|
2008-10-17 06:41:20 +00:00
|
|
|
<degrees C>: override all critical trip points
|
2007-08-14 19:49:32 +00:00
|
|
|
|
2007-08-12 04:12:44 +00:00
|
|
|
thermal.nocrt= [HW,ACPI]
|
|
|
|
Set to disable actions on ACPI thermal zone
|
|
|
|
critical and hot trip points.
|
|
|
|
|
2007-08-12 04:12:17 +00:00
|
|
|
thermal.off= [HW,ACPI]
|
|
|
|
1: disable ACPI thermal control
|
|
|
|
|
2007-08-12 04:12:35 +00:00
|
|
|
thermal.psv= [HW,ACPI]
|
|
|
|
-1: disable all passive trip points
|
2008-12-19 18:57:32 +00:00
|
|
|
<degrees C>: override all passive trip points to this
|
|
|
|
value
|
2007-08-12 04:12:35 +00:00
|
|
|
|
ACPI: thermal: expose "thermal.tzp=" to set global polling frequency
Thermal Zone Polling frequency (_TZP) is an optional ACPI object
recommending the rate that the OS should poll the associated thermal zone.
If _TZP is 0, no polling should be used.
If _TZP is non-zero, then the platform recommends that
the OS poll the thermal zone at the specified rate.
The minimum period is 30 seconds.
The maximum period is 5 minutes.
(note _TZP and thermal.tzp units are in deci-seconds,
so _TZP = 300 corresponds to 30 seconds)
If _TZP is not present, ACPI 3.0b recommends that the
thermal zone be polled at an "OS provided default frequency".
However, common industry practice is:
1. The BIOS never specifies any _TZP
2. High volume OS's from this century never poll any thermal zones
Ie. The OS depends on the platform's ability to
provoke thermal events when necessary, and
the "OS provided default frequency" is "never":-)
There is a proposal that ACPI 4.0 be updated to reflect
common industry practice -- ie. no _TZP, no polling.
The Linux kernel already follows this practice --
thermal zones are not polled unless _TZP is present and non-zero.
But thermal zone polling is useful as a workaround for systems
which have ACPI thermal control, but have an issue preventing
thermal events. Indeed, some Linux distributions still
set a non-zero thermal polling frequency for this reason.
But rather than ask the user to write a polling frequency
into all the /proc/acpi/thermal_zone/*/polling_frequency
files, here we simply document and expose the already
existing module parameter to do the same at system level,
to simplify debugging those broken platforms.
Note that thermal.tzp is a module-load time parameter only.
Signed-off-by: Len Brown <len.brown@intel.com>
2007-08-12 04:12:26 +00:00
|
|
|
thermal.tzp= [HW,ACPI]
|
|
|
|
Specify global default ACPI thermal zone polling rate
|
|
|
|
<deci-seconds>: poll all this frequency
|
|
|
|
0: no polling (default)
|
|
|
|
|
2011-02-23 23:52:23 +00:00
|
|
|
threadirqs [KNL]
|
|
|
|
Force threading of all interrupt handlers except those
|
|
|
|
marked explicitely IRQF_NO_THREAD.
|
|
|
|
|
2008-12-25 12:39:23 +00:00
|
|
|
topology= [S390]
|
|
|
|
Format: {off | on}
|
|
|
|
Specify if the kernel should make use of the cpu
|
2011-04-04 22:04:46 +00:00
|
|
|
topology information if the hardware supports this.
|
|
|
|
The scheduler will make use of this information and
|
2008-12-25 12:39:23 +00:00
|
|
|
e.g. base its process migration decisions on it.
|
2010-10-25 14:10:43 +00:00
|
|
|
Default is on.
|
2008-12-25 12:39:23 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
tp720= [HW,PS2]
|
|
|
|
|
2010-03-25 03:55:32 +00:00
|
|
|
tpm_suspend_pcr=[HW,TPM]
|
|
|
|
Format: integer pcr id
|
|
|
|
Specify that at suspend time, the tpm driver
|
|
|
|
should extend the specified pcr with zeros,
|
|
|
|
as a workaround for some chips which fail to
|
|
|
|
flush the last written pcr on TPM_SaveState.
|
|
|
|
This will guarantee that all the other pcrs
|
|
|
|
are saved.
|
|
|
|
|
2009-06-24 09:33:15 +00:00
|
|
|
trace_buf_size=nn[KMG]
|
|
|
|
[FTRACE] will set tracing buffer size.
|
2009-03-10 04:57:10 +00:00
|
|
|
|
2009-07-01 02:47:05 +00:00
|
|
|
trace_event=[event-list]
|
|
|
|
[FTRACE] Set and start specified trace events in order
|
|
|
|
to facilitate early boot debugging.
|
|
|
|
See also Documentation/trace/events.txt
|
|
|
|
|
2009-08-17 23:40:47 +00:00
|
|
|
tsc= Disable clocksource stability checks for TSC.
|
2008-10-25 00:22:01 +00:00
|
|
|
Format: <string>
|
|
|
|
[x86] reliable: mark tsc clocksource as reliable, this
|
2009-08-17 23:40:47 +00:00
|
|
|
disables clocksource verification at runtime, as well
|
|
|
|
as the stability checks done at bootup. Used to enable
|
|
|
|
high-resolution timer mode on older hardware, and in
|
|
|
|
virtualized environment.
|
2010-10-05 00:03:20 +00:00
|
|
|
[x86] noirqtime: Do not use TSC to do irq accounting.
|
|
|
|
Used to run time disable IRQ_TIME_ACCOUNTING on any
|
|
|
|
platforms where RDTSC is slow and this accounting
|
|
|
|
can add overhead.
|
2008-10-25 00:22:01 +00:00
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
turbografx.map[2|3]= [HW,JOY]
|
|
|
|
TurboGraFX parallel port interface
|
|
|
|
Format:
|
|
|
|
<port#>,<js1>,<js2>,<js3>,<js4>,<js5>,<js6>,<js7>
|
2005-04-16 22:20:36 +00:00
|
|
|
See also Documentation/input/joystick-parport.txt
|
|
|
|
|
2011-05-31 15:22:05 +00:00
|
|
|
udbg-immortal [PPC] When debugging early kernel crashes that
|
|
|
|
happen after console_init() and before a proper
|
|
|
|
console driver takes over, this boot options might
|
|
|
|
help "seeing" what's going on.
|
|
|
|
|
2009-10-07 00:37:59 +00:00
|
|
|
uhash_entries= [KNL,NET]
|
|
|
|
Set number of hash buckets for UDP/UDP-Lite connections
|
|
|
|
|
2006-12-05 21:29:55 +00:00
|
|
|
uhci-hcd.ignore_oc=
|
|
|
|
[USB] Ignore overcurrent events (default N).
|
|
|
|
Some badly-designed motherboards generate lots of
|
|
|
|
bogus events, for ports that aren't wired to
|
|
|
|
anything. Set this parameter to avoid log spamming.
|
|
|
|
Note that genuine overcurrent events won't be
|
|
|
|
reported either.
|
|
|
|
|
2008-07-19 22:32:54 +00:00
|
|
|
unknown_nmi_panic
|
2011-04-04 22:02:24 +00:00
|
|
|
[X86] Cause panic on unknown NMI.
|
2008-07-19 22:32:54 +00:00
|
|
|
|
2011-05-31 19:31:08 +00:00
|
|
|
usbcore.authorized_default=
|
|
|
|
[USB] Default USB device authorization:
|
|
|
|
(default -1 = authorized except for wireless USB,
|
|
|
|
0 = not authorized, 1 = authorized)
|
|
|
|
|
2007-02-20 20:00:53 +00:00
|
|
|
usbcore.autosuspend=
|
|
|
|
[USB] The autosuspend time delay (in seconds) used
|
|
|
|
for newly-detected USB devices (default 2). This
|
|
|
|
is the time required before an idle device will be
|
|
|
|
autosuspended. Devices for which the delay is set
|
2007-03-13 20:39:15 +00:00
|
|
|
to a negative value won't be autosuspended at all.
|
2007-02-20 20:00:53 +00:00
|
|
|
|
2008-10-10 14:24:45 +00:00
|
|
|
usbcore.usbfs_snoop=
|
|
|
|
[USB] Set to log all usbfs traffic (default 0 = off).
|
|
|
|
|
|
|
|
usbcore.blinkenlights=
|
|
|
|
[USB] Set to cycle leds on hubs (default 0 = off).
|
|
|
|
|
|
|
|
usbcore.old_scheme_first=
|
|
|
|
[USB] Start with the old device initialization
|
|
|
|
scheme (default 0 = off).
|
|
|
|
|
|
|
|
usbcore.use_both_schemes=
|
|
|
|
[USB] Try the other device initialization scheme
|
|
|
|
if the first one fails (default 1 = enabled).
|
|
|
|
|
|
|
|
usbcore.initial_descriptor_timeout=
|
|
|
|
[USB] Specifies timeout for the initial 64-byte
|
|
|
|
USB_REQ_GET_DESCRIPTOR request in milliseconds
|
|
|
|
(default 5000 = 5.0 seconds).
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
usbhid.mousepoll=
|
|
|
|
[USBHID] The interval which mice are to be polled at.
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2008-11-10 19:07:45 +00:00
|
|
|
usb-storage.delay_use=
|
|
|
|
[UMS] The delay in seconds before a new device is
|
|
|
|
scanned for Logical Units (default 5).
|
|
|
|
|
|
|
|
usb-storage.quirks=
|
|
|
|
[UMS] A list of quirks entries to supplement or
|
|
|
|
override the built-in unusual_devs list. List
|
|
|
|
entries are separated by commas. Each entry has
|
|
|
|
the form VID:PID:Flags where VID and PID are Vendor
|
|
|
|
and Product ID values (4-digit hex numbers) and
|
|
|
|
Flags is a set of characters, each corresponding
|
|
|
|
to a common usb-storage quirk flag as follows:
|
2008-12-15 15:40:06 +00:00
|
|
|
a = SANE_SENSE (collect more than 18 bytes
|
|
|
|
of sense data);
|
2009-12-07 21:39:16 +00:00
|
|
|
b = BAD_SENSE (don't collect more than 18
|
|
|
|
bytes of sense data);
|
2008-11-10 19:07:45 +00:00
|
|
|
c = FIX_CAPACITY (decrease the reported
|
|
|
|
device capacity by one sector);
|
2011-05-18 20:42:34 +00:00
|
|
|
d = NO_READ_DISC_INFO (don't use
|
|
|
|
READ_DISC_INFO command);
|
|
|
|
e = NO_READ_CAPACITY_16 (don't use
|
|
|
|
READ_CAPACITY_16 command);
|
2008-12-15 15:40:06 +00:00
|
|
|
h = CAPACITY_HEURISTICS (decrease the
|
|
|
|
reported device capacity by one
|
|
|
|
sector if the number is odd);
|
2008-11-10 19:07:45 +00:00
|
|
|
i = IGNORE_DEVICE (don't bind to this
|
|
|
|
device);
|
|
|
|
l = NOT_LOCKABLE (don't try to lock and
|
|
|
|
unlock ejectable media);
|
|
|
|
m = MAX_SECTORS_64 (don't transfer more
|
|
|
|
than 64 sectors = 32 KB at a time);
|
2011-06-07 15:35:52 +00:00
|
|
|
n = INITIAL_READ10 (force a retry of the
|
|
|
|
initial READ(10) command);
|
2008-12-15 15:40:06 +00:00
|
|
|
o = CAPACITY_OK (accept the capacity
|
|
|
|
reported by the device);
|
2008-11-10 19:07:45 +00:00
|
|
|
r = IGNORE_RESIDUE (the device reports
|
|
|
|
bogus residue values);
|
|
|
|
s = SINGLE_LUN (the device has only one
|
|
|
|
Logical Unit);
|
|
|
|
w = NO_WP_DETECT (don't test whether the
|
|
|
|
medium is write-protected).
|
|
|
|
Example: quirks=0419:aaf5:rl,0421:0433:rc
|
|
|
|
|
2011-08-13 19:34:50 +00:00
|
|
|
user_debug= [KNL,ARM]
|
|
|
|
Format: <int>
|
|
|
|
See arch/arm/Kconfig.debug help text.
|
|
|
|
1 - undefined instruction events
|
|
|
|
2 - system calls
|
|
|
|
4 - invalid data aborts
|
|
|
|
8 - SIGSEGV faults
|
|
|
|
16 - SIGBUS faults
|
|
|
|
Example: user_debug=31
|
|
|
|
|
2010-02-17 10:38:10 +00:00
|
|
|
userpte=
|
|
|
|
[X86] Flags controlling user PTE allocations.
|
|
|
|
|
|
|
|
nohigh = do not allocate PTE pages in
|
|
|
|
HIGHMEM regardless of setting
|
|
|
|
of CONFIG_HIGHPTE.
|
|
|
|
|
2009-04-14 08:33:43 +00:00
|
|
|
vdso= [X86,SH]
|
2007-05-02 17:27:12 +00:00
|
|
|
vdso=2: enable compat VDSO (default with COMPAT_VDSO)
|
[PATCH] vdso: randomize the i386 vDSO by moving it into a vma
Move the i386 VDSO down into a vma and thus randomize it.
Besides the security implications, this feature also helps debuggers, which
can COW a vma-backed VDSO just like a normal DSO and can thus do
single-stepping and other debugging features.
It's good for hypervisors (Xen, VMWare) too, which typically live in the same
high-mapped address space as the VDSO, hence whenever the VDSO is used, they
get lots of guest pagefaults and have to fix such guest accesses up - which
slows things down instead of speeding things up (the primary purpose of the
VDSO).
There's a new CONFIG_COMPAT_VDSO (default=y) option, which provides support
for older glibcs that still rely on a prelinked high-mapped VDSO. Newer
distributions (using glibc 2.3.3 or later) can turn this option off. Turning
it off is also recommended for security reasons: attackers cannot use the
predictable high-mapped VDSO page as syscall trampoline anymore.
There is a new vdso=[0|1] boot option as well, and a runtime
/proc/sys/vm/vdso_enabled sysctl switch, that allows the VDSO to be turned
on/off.
(This version of the VDSO-randomization patch also has working ELF
coredumping, the previous patch crashed in the coredumping code.)
This code is a combined work of the exec-shield VDSO randomization
code and Gerd Hoffmann's hypervisor-centric VDSO patch. Rusty Russell
started this patch and i completed it.
[akpm@osdl.org: cleanups]
[akpm@osdl.org: compile fix]
[akpm@osdl.org: compile fix 2]
[akpm@osdl.org: compile fix 3]
[akpm@osdl.org: revernt MAXMEM change]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Cc: Gerd Hoffmann <kraxel@suse.de>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Zachary Amsden <zach@vmware.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-27 09:53:50 +00:00
|
|
|
vdso=1: enable VDSO (default)
|
|
|
|
vdso=0: disable VDSO mapping
|
|
|
|
|
2009-04-14 08:33:43 +00:00
|
|
|
vdso32= [X86]
|
2008-01-30 12:30:43 +00:00
|
|
|
vdso32=2: enable compat VDSO (default with COMPAT_VDSO)
|
|
|
|
vdso32=1: enable 32-bit VDSO (default)
|
|
|
|
vdso32=0: disable 32-bit VDSO mapping
|
|
|
|
|
2007-07-17 12:22:55 +00:00
|
|
|
vector= [IA-64,SMP]
|
|
|
|
vector=percpu: enable percpu vector domain
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
video= [FB] Frame buffer configuration
|
|
|
|
See Documentation/fb/modedb.txt.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
vga= [BOOT,X86-32] Select a particular video mode
|
2009-02-19 21:48:14 +00:00
|
|
|
See Documentation/x86/boot.txt and
|
2005-10-23 19:57:11 +00:00
|
|
|
Documentation/svga.txt.
|
2005-04-16 22:20:36 +00:00
|
|
|
Use vga=ask for menu.
|
|
|
|
This is actually a boot loader parameter; the value is
|
|
|
|
passed to the kernel using a special protocol.
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
vmalloc=nn[KMG] [KNL,BOOT] Forces the vmalloc area to have an exact
|
2005-04-16 22:20:36 +00:00
|
|
|
size of <nn>. This can be used to increase the
|
|
|
|
minimum size (128MB on x86). It can also be used to
|
|
|
|
decrease the size and leave more room for directly
|
|
|
|
mapped kernel RAM.
|
|
|
|
|
2006-06-29 13:08:25 +00:00
|
|
|
vmhalt= [KNL,S390] Perform z/VM CP command after system halt.
|
|
|
|
Format: <command>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-06-29 13:08:25 +00:00
|
|
|
vmpanic= [KNL,S390] Perform z/VM CP command after kernel panic.
|
|
|
|
Format: <command>
|
|
|
|
|
|
|
|
vmpoff= [KNL,S390] Perform z/VM CP command after power off.
|
|
|
|
Format: <command>
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2011-08-10 15:15:32 +00:00
|
|
|
vsyscall= [X86-64]
|
|
|
|
Controls the behavior of vsyscalls (i.e. calls to
|
|
|
|
fixed addresses of 0xffffffffff600x00 from legacy
|
|
|
|
code). Most statically-linked binaries and older
|
|
|
|
versions of glibc use these calls. Because these
|
|
|
|
functions are at fixed addresses, they make nice
|
|
|
|
targets for exploits that can control RIP.
|
|
|
|
|
2011-10-05 21:40:47 +00:00
|
|
|
emulate Vsyscalls turn into traps and are emulated
|
|
|
|
reasonably safely.
|
2011-08-10 15:15:32 +00:00
|
|
|
|
2011-10-05 21:40:47 +00:00
|
|
|
native [default] Vsyscalls are native syscall
|
|
|
|
instructions.
|
2011-08-10 15:15:32 +00:00
|
|
|
This is a little bit faster than trapping
|
|
|
|
and makes a few dynamic recompilers work
|
|
|
|
better than they would in emulation mode.
|
|
|
|
It also makes exploits much easier to write.
|
|
|
|
|
|
|
|
none Vsyscalls don't work at all. This makes
|
|
|
|
them quite hard to use for exploits but
|
|
|
|
might break your system.
|
|
|
|
|
2009-12-16 00:45:39 +00:00
|
|
|
vt.cur_default= [VT] Default cursor shape.
|
|
|
|
Format: 0xCCBBAA, where AA, BB, and CC are the same as
|
|
|
|
the parameters of the <Esc>[?A;B;Cc escape sequence;
|
|
|
|
see VGA-softcursor.txt. Default: 2 = underline.
|
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
vt.default_blu= [VT]
|
|
|
|
Format: <blue0>,<blue1>,<blue2>,...,<blue15>
|
|
|
|
Change the default blue palette of the console.
|
|
|
|
This is a 16-member array composed of values
|
|
|
|
ranging from 0-255.
|
|
|
|
|
|
|
|
vt.default_grn= [VT]
|
|
|
|
Format: <green0>,<green1>,<green2>,...,<green15>
|
|
|
|
Change the default green palette of the console.
|
|
|
|
This is a 16-member array composed of values
|
|
|
|
ranging from 0-255.
|
|
|
|
|
|
|
|
vt.default_red= [VT]
|
|
|
|
Format: <red0>,<red1>,<red2>,...,<red15>
|
|
|
|
Change the default red palette of the console.
|
|
|
|
This is a 16-member array composed of values
|
|
|
|
ranging from 0-255.
|
|
|
|
|
|
|
|
vt.default_utf8=
|
|
|
|
[VT]
|
|
|
|
Format=<0|1>
|
|
|
|
Set system-wide default UTF-8 mode for all tty's.
|
|
|
|
Default is 1, i.e. UTF-8 mode is enabled for all
|
|
|
|
newly opened terminals.
|
|
|
|
|
2009-11-13 20:14:11 +00:00
|
|
|
vt.global_cursor_default=
|
|
|
|
[VT]
|
|
|
|
Format=<-1|0|1>
|
|
|
|
Set system-wide default for whether a cursor
|
|
|
|
is shown on new VTs. Default is -1,
|
|
|
|
i.e. cursors will be created by default unless
|
|
|
|
overridden by individual drivers. 0 will hide
|
|
|
|
cursors, 1 will display them.
|
|
|
|
|
2010-05-03 18:42:52 +00:00
|
|
|
watchdog timers [HW,WDT] For information on watchdog timers,
|
|
|
|
see Documentation/watchdog/watchdog-parameters.txt
|
|
|
|
or other driver-specific files in the
|
|
|
|
Documentation/watchdog/ directory.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2009-04-05 22:55:22 +00:00
|
|
|
x2apic_phys [X86-64,APIC] Use x2apic physical mode instead of
|
|
|
|
default x2apic cluster mode on platforms
|
|
|
|
supporting x2apic.
|
|
|
|
|
2009-09-02 14:37:17 +00:00
|
|
|
x86_mrst_timer= [X86-32,APBT]
|
|
|
|
Choose timer option for x86 Moorestown MID platform.
|
|
|
|
Two valid options are apbt timer only and lapic timer
|
|
|
|
plus one apbt timer for broadcast timer.
|
|
|
|
x86_mrst_timer=apbt_only | lapic_and_apbt
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
xd= [HW,XT] Original XT pre-IDE (RLL encoded) disks.
|
|
|
|
xd_geo= See header of drivers/block/xd.c.
|
|
|
|
|
2010-05-14 11:44:30 +00:00
|
|
|
xen_emul_unplug= [HW,X86,XEN]
|
|
|
|
Unplug Xen emulated devices
|
|
|
|
Format: [unplug0,][unplug1]
|
|
|
|
ide-disks -- unplug primary master IDE devices
|
|
|
|
aux-ide-disks -- unplug non-primary-master IDE devices
|
|
|
|
nics -- unplug network devices
|
|
|
|
all -- unplug all emulated devices (NICs and IDE disks)
|
2010-08-23 10:59:29 +00:00
|
|
|
unnecessary -- unplugging emulated devices is
|
|
|
|
unnecessary even if the host did not respond to
|
|
|
|
the unplug protocol
|
2010-08-23 10:59:28 +00:00
|
|
|
never -- do not unplug even if version check succeeds
|
2010-05-14 11:44:30 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
xirc2ps_cs= [NET,PCMCIA]
|
2005-10-23 19:57:11 +00:00
|
|
|
Format:
|
|
|
|
<irq>,<irq_mask>,<io>,<full_duplex>,<do_sound>,<lockup_hack>[,<irq2>[,<irq3>[,<irq4>]]]
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
______________________________________________________________________
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
TODO:
|
|
|
|
|
|
|
|
Add more DRM drivers.
|