Eric Sandeen c2d7543851 filesystem freeze: allow SysRq emergency thaw to thaw frozen filesystems ... Now that the filesystem freeze operation has been elevated to the VFS, and is just an ioctl away, some sort of safety net for unintentionally frozen root filesystems may be in order. The timeout thaw originally proposed did not get merged, but perhaps something like this would be useful in emergencies. For example, freeze /path/to/mountpoint may freeze your root filesystem if you forgot that you had that unmounted. I chose 'j' as the last remaining character other than 'h' which is sort of reserved for help (because help is generated on any unknown character). I've tested this on a non-root fs with multiple (nested) freezers, as well as on a system rendered unresponsive due to a frozen root fs. [randy.dunlap@oracle.com: emergency thaw only if CONFIG_BLOCK enabled] Signed-off-by: Eric Sandeen <sandeen@redhat.com> Cc: Takashi Sato <t-sato@yk.jp.nec.com> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2009-04-01 08:59:17 -07:00
..
agp	agp/intel: Add support for new intel chipset.	2009-03-27 15:12:08 -07:00
hw_random	Merge branch 'origin' into devel	2009-03-28 20:29:51 +00:00
ip2	proc tty: switch ip2 to ->proc_fops	2009-04-01 08:59:08 -07:00
ipmi	proc 2/2: remove struct proc_dir_entry::owner	2009-03-31 01:14:44 +04:00
mwave	mwave: struct device - replace bus_id with dev_name(), dev_set_name()	2009-01-06 10:44:38 -08:00
pcmcia	proc tty: switch synclink_cs to ->proc_fops	2009-04-01 08:59:08 -07:00
rio	rio: Kill off ckmalloc	2009-01-02 10:19:38 -08:00
tpm	Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6	2009-03-26 11:17:04 -07:00
xilinx_hwicap	xilinx_hwicap: remove improper wording in license statement	2008-12-17 11:23:07 -08:00
.gitignore
amiserial.c	proc tty: switch amiserial to ->proc_fops	2009-04-01 08:59:10 -07:00
apm-emulation.c	APM emulation: Notify about all suspend events, not just APM invoked ones (v2)	2008-07-16 23:27:02 +02:00
applicom.c	applicom.c: fix apparently-broken code in do_ac_read()	2008-10-16 11:21:47 -07:00
applicom.h
bfin-otp.c
briq_panel.c	briq_panel: BKL pushdown	2008-06-20 14:05:55 -06:00
bsr.c	powerpc: Cleanup from l64 to ll64 change: drivers/char	2009-01-13 14:48:00 +11:00
cd1865.h
ChangeLog
consolemap.c	consolemap: indentation & braces disagree - reindent	2009-01-06 15:59:30 -08:00
cp437.uni	unicode table for cp437	2008-12-13 11:25:49 -08:00
cs5535_gpio.c	Add a bunch of cycle_kernel_lock() calls	2008-06-20 14:05:53 -06:00
cyclades.c	proc tty: switch cyclades to ->proc_fops	2009-04-01 08:59:08 -07:00
defkeymap.c_shipped
defkeymap.map
digi1.h
digiFep1.h
digiPCI.h
ds1302.c	rtc: use bcd2bin/bin2bcd	2008-10-20 08:52:41 -07:00
ds1620.c	[ARM] netwinder: clean up GPIO naming	2008-12-13 09:12:07 +00:00
dsp56k.c	device create: char: convert device_create_drvdata to device_create	2008-10-16 09:24:42 -07:00
dtlk.c	Add a bunch of cycle_kernel_lock() calls	2008-06-20 14:05:53 -06:00
efirtc.c	drivers/char/efirtc.c: removed duplicated #include	2008-08-04 16:59:56 -07:00
epca.c	trivial: fix an -> a typos in documentation and comments	2009-01-06 11:28:07 +01:00
epca.h	epca: use tty_port	2008-07-20 17:12:36 -07:00
epcaconfig.h
esp.c	tty_port: Add a port level carrier detect operation	2009-01-02 10:19:38 -08:00
generic_nvram.c	driver/char/generic_nvram: fix banner	2008-06-12 18:05:41 -07:00
generic_serial.c	tty: Remove some pointless casts	2009-01-02 10:19:40 -08:00
genrtc.c	genrtc: BKL pushdown	2008-06-20 14:05:57 -06:00
hangcheck-timer.c
hpet.c	x86: correct link to HPET timer specification	2008-11-24 10:05:12 +01:00
hvc_beat.c	powerpc/cell: Use correct types in beat files	2009-01-08 16:25:16 +11:00
hvc_console.c	hvc_console: Remove tty->low_latency	2009-01-16 16:15:16 +11:00
hvc_console.h	powerpc: Make open count variables signed in hvcs/hvsi/hvc_console	2008-12-03 21:04:13 +11:00
hvc_irq.c	hvc_console: Call free_irq() only if request_irq() was successful	2009-01-13 14:48:01 +11:00
hvc_iseries.c	drivers/hvc: Add missing of_node_put	2008-12-03 21:04:09 +11:00
hvc_iucv.c	[S390] hvc_iucv: Provide IUCV z/VM user ID filtering	2009-03-26 15:24:08 +01:00
hvc_rtas.c
hvc_udbg.c	powerpc: udbg-based backend for hvc_console	2008-11-19 16:04:25 +11:00
hvc_vio.c	drivers/hvc: Add missing of_node_put	2008-12-03 21:04:09 +11:00
hvc_xen.c	hvc_console: Add a hangup notifier for backends	2008-10-22 10:59:54 +11:00
hvcs.c	hvc_console: Remove tty->low_latency on pseries backends	2009-03-11 10:44:26 +11:00
hvsi.c	hvc_console: Remove tty->low_latency on pseries backends	2009-03-11 10:44:26 +11:00
i8k.c	i8k: Add Dell Vostro systems	2009-01-02 10:28:32 -08:00
isicom.c	tty: Introduce some close helpers for ports	2009-01-02 10:19:40 -08:00
istallion.c	proc tty: switch istallion to ->proc_fops	2009-04-01 08:59:08 -07:00
Kconfig	NVRAM depends on RTC_DRV_CMOS	2009-01-31 01:21:59 +01:00
keyboard.c	Input: keyboard - fix potential out of bound access to key_map	2008-10-08 23:45:36 -04:00
lp.c	device create: char: convert device_create_drvdata to device_create	2008-10-16 09:24:42 -07:00
Makefile	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc	2008-12-28 16:54:33 -08:00
mbcs.c	mbcs: cdev lock_kernel() pushdown	2008-06-20 14:05:48 -06:00
mbcs.h
mem.c	mm: make vread() and vwrite() declaration	2009-01-06 15:59:05 -08:00
misc.c	device create: char: convert device_create_drvdata to device_create	2008-10-16 09:24:42 -07:00
mmtimer.c	mmtimer: Push BKL down into the ioctl handler	2008-07-17 11:34:49 -07:00
moxa.c	tty_port: Add a port level carrier detect operation	2009-01-02 10:19:38 -08:00
moxa.h
mspec.c	mspec: convert nopfn to fault	2008-07-24 10:47:14 -07:00
mxser.c	tty: Introduce some close helpers for ports	2009-01-02 10:19:40 -08:00
mxser.h
n_hdlc.c	tty: some ICANON magic is in the wrong places	2008-10-13 09:51:44 -07:00
n_r3964.c	tty: Remove some pointless casts	2009-01-02 10:19:40 -08:00
n_tty.c	tty: N_TTY SIGIO only works for read	2009-01-02 10:19:40 -08:00
nozomi.c	tty: kref nozomi	2009-01-02 10:19:40 -08:00
nsc_gpio.c
nvram.c	[PATCH] nvram - convert PRINT_PROC to seq_file	2008-11-11 09:56:00 +00:00
nwbutton.c
nwbutton.h
nwflash.c	[ARM] netwinder: clean up GPIO naming	2008-12-13 09:12:07 +00:00
pc8736x_gpio.c	pc8736x_gpio: add support for PC87365 chips	2008-10-20 08:52:40 -07:00
ppdev.c	device create: char: convert device_create_drvdata to device_create	2008-10-16 09:24:42 -07:00
ps3flash.c	powerpc/ps3: Printing fixups for l64 to ll64 conversion drivers/char	2009-01-16 16:15:14 +11:00
pty.c	pty: Fix documentation	2009-01-12 16:37:00 -08:00
random.c	sparseirq: fix build with unknown irq_desc struct	2009-01-11 16:06:03 +01:00
raw.c	Add a missing unlock_kernel() in raw_open()	2009-03-27 10:59:09 -06:00
riscom8.c	tty: Remove some pointless casts	2009-01-02 10:19:40 -08:00
riscom8.h	tty: add more tty_port fields	2008-07-20 17:12:38 -07:00
riscom8_reg.h
rocket.c	tty: use port methods for the rocket driver	2009-01-02 10:19:42 -08:00
rocket.h	tty: rocketport uses different port flags to everyone else	2009-01-02 10:19:39 -08:00
rocket_int.h	tty: rocketport uses different port flags to everyone else	2009-01-02 10:19:39 -08:00
rtc.c	RTC: Remove the BKL.	2009-01-08 16:44:03 -07:00
scc.h	m68k: atari - Rename "mfp" to "st_mfp"	2009-02-22 09:23:02 -08:00
scx200_gpio.c	Add a bunch of cycle_kernel_lock() calls	2008-06-20 14:05:53 -06:00
selection.c	Fix memory corruption in console selection	2009-01-31 15:51:31 -08:00
ser_a2232.c	m68k: ser_a2232 - Kill warn_unused_result warnings	2009-01-12 20:56:39 +01:00
ser_a2232.h
ser_a2232fw.ax
ser_a2232fw.h
serial167.c	tty: Remove some pointless casts	2009-01-02 10:19:40 -08:00
snsc.c	device create: char: convert device_create_drvdata to device_create	2008-10-16 09:24:42 -07:00
snsc.h
snsc_event.c	byteorder: don't directly include linux/byteorder/generic.h	2008-05-16 12:01:45 -07:00
sonypi.c	Rationalize fasync return values	2009-03-16 08:34:35 -06:00
specialix.c	tty: Remove some pointless casts	2009-01-02 10:19:40 -08:00
specialix_io8.h	tty: add more tty_port fields	2008-07-20 17:12:38 -07:00
stallion.c	proc tty: switch stallion to ->proc_fops	2009-04-01 08:59:09 -07:00
sx.c	sx.c: avoid referencing freed memory if copy_from_user() fails	2009-02-20 17:57:49 -08:00
sx.h
sxboards.h
sxwindow.h
synclink.c	proc tty: switch synclink to ->proc_fops	2009-04-01 08:59:09 -07:00
synclink_gt.c	proc tty: switch synclink_gt to ->proc_fops	2009-04-01 08:59:09 -07:00
synclinkmp.c	proc tty: switch synclinkmp to ->proc_fops	2009-04-01 08:59:09 -07:00
sysrq.c	filesystem freeze: allow SysRq emergency thaw to thaw frozen filesystems	2009-04-01 08:59:17 -07:00
tb0219.c	Add a bunch of cycle_kernel_lock() calls	2008-06-20 14:05:53 -06:00
tlclk.c	tlckl: BKL pushdown	2008-06-20 14:05:51 -06:00
toshiba.c
tty_audit.c	Audit: Log TIOCSTI	2008-12-09 20:32:06 +11:00
tty_buffer.c	tty: split the buffering from tty_io	2008-10-13 09:51:40 -07:00
tty_io.c	Use f_lock to protect f_flags	2009-03-16 08:32:27 -06:00
tty_ioctl.c	tty: Fix race in the flush for some ldiscs	2009-01-15 12:48:35 -08:00
tty_ldisc.c	tty: Fix PPP hang under load	2009-01-02 10:19:38 -08:00
tty_port.c	tty: use port methods for the rocket driver	2009-01-02 10:19:42 -08:00
vc_screen.c	vcs: hook sysfs devices into object lifetime instead of "binding"	2009-03-24 16:38:26 -07:00
viotape.c	device create: char: convert device_create_drvdata to device_create	2008-10-16 09:24:42 -07:00
virtio_console.c	virtio_console: support console resizing	2008-12-30 09:26:10 +10:30
vme_scc.c	m68k: vme_scc - Kill warn_unused_result warnings	2009-01-12 20:56:38 +01:00
vr41xx_giu.c	drivers/char: use nr_irqs	2008-10-16 16:52:05 +02:00
vt.c	vcs: hook sysfs devices into object lifetime instead of "binding"	2009-03-24 16:38:26 -07:00
vt_ioctl.c	tty: Remove some pointless casts	2009-01-02 10:19:40 -08:00