mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity
linux-stable/drivers
History
Markus Stockhausen d06f191f8e md/raid5: introduce configuration option rmw_level 
Depending on the available coding we allow optimized rmw logic for write
operations. To support easier testing this patch allows manual control
of the rmw/rcw descision through the interface /sys/block/mdX/md/rmw_level.

The configuration can handle three levels of control.

rmw_level=0: Disable rmw for all RAID types. Hardware assisted P/Q
calculation has no implementation path yet to factor in/out chunks of
a syndrome. Enforcing this level can be benefical for slow CPUs with
hardware syndrome support and fast SSDs.

rmw_level=1: Estimate rmw IOs and rcw IOs. Execute rmw only if we will
save IOs. This equals the "old" unpatched behaviour and will be the
default.

rmw_level=2: Execute rmw even if calculated IOs for rmw and rcw are
equal. We might have higher CPU consumption because of calculating the
parity twice but it can be benefical otherwise. E.g. RAID4 with fast
dedicated parity disk/SSD. The option is implemented just to be
forward-looking and will ONLY work with this patch!

Signed-off-by: Markus Stockhausen <stockhausen@collogia.de>
Signed-off-by: NeilBrown <neilb@suse.de>
 		2015-04-22 08:00:42 +10:00
..
accessibility
…
acpi Revert "x86/PCI: Refine the way to release PCI IRQ resources" 2015-03-20 14:56:19 +01:00
amba ARM: 8256/1: driver coamba: add device binding path 'driver_override' 2015-02-10 10:23:15 +00:00
android android: binder: fix binder mmap failures 2015-03-01 18:43:51 -08:00
ata libata: Blacklist queued TRIM on Samsung SSD 850 Pro 2015-03-27 15:22:46 -04:00
atm
…
auxdisplay
…
base regmap: Fix for v4.0 2015-03-24 16:42:54 -07:00
bcma bcma: implement host code support for PCIe Gen 2 devices 2015-01-29 10:54:43 +02:00
block NVMe: Initialize device list head before starting 2015-03-23 09:35:12 -06:00
bluetooth Bluetooth: btusb: Fix issue with CSR based Intel Wireless controllers 2015-02-23 09:30:35 +02:00
bus ARM: SoC platform changes 2015-02-17 09:27:54 -08:00
cdrom
…
char Not entirely surprising: the ongoing QEMU work on virtio 1.0 has revealed 2015-03-17 10:36:01 -07:00
clk The clk fixes for 4.0-rc4 comprise three themes. First are the usual 2015-03-15 15:07:08 -07:00
clocksource clocksource/drivers/sun5i: Fix cpufreq interaction with sched_clock() 2015-03-26 10:59:40 +01:00
connector
…
coresight coresight: fix function etm_writel_cp14() parameter order 2015-02-04 10:42:55 -08:00
cpufreq Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal 2015-03-06 13:43:33 -08:00
cpuidle cpuidle: mvebu: Update cpuidle thresholds for Armada XP SOCs 2015-03-13 18:31:29 +01:00
crypto Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2015-02-18 08:49:20 -08:00
dca
…
devfreq Merge branches 'pm-cpufreq', 'pm-cpuidle', 'pm-devfreq', 'pm-opp' and 'pm-tools' 2015-02-13 21:39:06 +01:00
dio
…
dma dmaengine: moxart-dma: Fix memory leak when stopping a running transfer 2015-03-30 23:17:08 +05:30
dma-buf
…
edac * A fix to sb_edac for proper detection on SNB machines 2015-02-19 11:18:14 -08:00
eisa
…
extcon
…
firewire firewire: core: use correct vendor/model IDs 2015-02-02 21:56:03 +01:00
firmware * Fix integer overflow issue in the DMI SMBIOS 3.0 code when 2015-03-31 10:45:47 +02:00
fmc
…
gpio gpio: syscon: reduce message level when direction reg offset not in dt 2015-03-27 11:17:08 +01:00
gpu Merge branch 'drm-fixes-4.0' of git://people.freedesktop.org/~agd5f/linux into drm-fixes 2015-04-03 09:28:55 +10:00
hid HID: wacom: check for wacom->shared before following the pointer 2015-03-17 20:59:55 +01:00
hsi
…
hv Char / Misc patches for 3.20-rc1 2015-02-15 10:48:44 -08:00
hwmon hwmon: (ads7828) Check return value of devm_regmap_init_i2c 2015-02-22 20:10:30 -08:00
hwspinlock
…
i2c Revert "i2c: core: Dispose OF IRQ mapping at client removal time" 2015-03-12 10:23:05 +01:00
ide ide_tape: convert jiffies with jiffies_to_msecs 2015-03-18 23:25:57 -04:00
idle intel_idle: Add ->enter_freeze callbacks 2015-02-15 19:40:09 +01:00
iio iio: imu: Use iio_trigger_get for indio_dev->trig assignment 2015-03-28 13:51:40 +00:00
infiniband IB/uverbs: Prevent integer overflow in ib_umem_get address arithmetic 2015-04-02 09:53:59 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2015-04-06 14:10:08 -07:00
iommu iommu/vt-d: Remove unused variable 2015-03-24 15:39:26 +01:00
ipack
…
irqchip Merge branch 'irqchip/urgent-gic' into irqchip/urgent 2015-03-29 19:34:05 +00:00
isdn isdn: icn: use strlcpy() when parsing setup options 2015-03-15 22:24:37 -04:00
leds leds: leds-gpio: Pass on error codes unmodified 2015-02-02 14:36:10 -08:00
lguest lguest: now needs PCI_DIRECT. 2015-04-01 10:29:05 -07:00
macintosh
…
mailbox Merge branch 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration 2015-02-11 12:56:40 -08:00
mcb mcb: Fix error path of mcb_pci_probe 2015-02-03 15:48:51 -08:00
md md/raid5: introduce configuration option rmw_level 2015-04-22 08:00:42 +10:00
media mm: gup: use get_user_pages_unlocked 2015-02-11 17:06:05 -08:00
memory memory/fsl-corenet-cf: Add t1040 support 2015-01-29 22:57:43 -06:00
memstick
…
message i2o: move to staging 2015-02-03 15:58:39 -08:00
mfd mfd: kempld-core: Fix callback return value check 2015-03-12 09:27:58 +00:00
misc mei: make device disabled on stop unconditionally 2015-03-01 19:34:50 -08:00
mmc mmc: pwrseq_simple: fix error path in mmc_pwrseq_simple_alloc 2015-03-19 11:26:35 +01:00
mtd This pull request fixes a bug introduced during the v4.0 merge window where we 2015-03-21 10:36:44 -07:00
net net/mlx4_core: Fix error message deprecation for ConnectX-2 cards 2015-04-06 17:32:27 -04:00
nfc NFC: nci: Move NFCEE discovery logic 2015-02-04 09:15:18 +01:00
ntb
…
nubus
…
of drivers/of: Add empty ranges quirk for PA-Semi 2015-03-27 19:31:16 -07:00
oprofile
…
parisc
…
parport
…
pci PCI updates for v4.0: 2015-03-12 09:45:46 -07:00
pcmcia Revert "pcmcia: add a new resource manager for non ISA systems" 2015-03-11 14:21:23 +01:00
phy phy: omap-usb2: Fix missing clk_prepare call when using old dt name 2015-03-13 17:14:39 +05:30
pinctrl pinctrl: sun4i: GPIOs configured as irq must be set to input before reading 2015-03-18 10:56:46 +01:00
platform Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-02-21 11:12:07 -08:00
pnp Merge branches 'pnp', 'pm-cpuidle' and 'pm-cpufreq' 2015-02-21 04:29:16 +01:00
power
…
powercap powercap / RAPL: handle domains with different energy units 2015-03-13 23:18:44 +01:00
pps
…
ps3
…
ptp
…
pwm pwm: tegra: Use NSEC_PER_SEC 2015-02-18 08:40:29 +01:00
rapidio Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2015-02-18 08:49:20 -08:00
ras
…
regulator Merge remote-tracking branches 'regulator/fix/doc' and 'regulator/fix/palmas' into regulator-linus 2015-03-23 11:43:42 -07:00
remoteproc
…
reset
…
rpmsg virtio_rpmsg: set DRIVER_OK before using device 2015-03-13 15:55:42 +10:30
rtc drivers/rtc/rtc-mrst: fix suspend/resume 2015-03-25 16:20:30 -07:00
s390 s390/dcss: array index 'i' is used before limits check. 2015-02-26 09:24:48 +01:00
sbus
…
scsi Merge branch 'for-4.0-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2015-03-24 17:08:29 -07:00
sfi
…
sh drivers: sh: Disable PM runtime for multi-platform r8a7740 with genpd 2015-02-24 07:26:12 +09:00
sn
…
soc ARM: SoC driver updates 2015-02-17 09:38:59 -08:00
spi Merge remote-tracking branches 'spi/fix/dw', 'spi/fix/queue' and 'spi/fix/qup' into spi-linus 2015-03-24 10:38:44 -07:00
spmi
…
ssb treewide: Remove unnecessary SSB_DEVTABLE_END macro 2015-02-11 14:38:29 -08:00
staging 3rd set of IIO fixes for the 4.0 cycle. 2015-03-24 22:55:20 +01:00
target target: do not reject FUA CDBs when write cache is enabled but emulate_write_cache is 0 2015-03-19 23:26:46 -07:00
tc
…
thermal thermal: Make sysfs attributes of cooling devices default attributes 2015-03-05 01:47:57 -04:00
thunderbolt
…
tty tty: serial: fsl_lpuart: clear receive flag on FIFO flush 2015-03-26 23:13:14 +01:00
uio
…
usb USB-serial fixes for v4.0-rc6 2015-04-01 13:42:58 +02:00
uwb USB patches for 3.20-rc1 2015-02-15 10:24:55 -08:00
vfio vfio-pci: Add missing break to enable VFIO_PCI_ERR_IRQ_INDEX 2015-03-12 09:51:38 -06:00
vhost Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2015-03-21 11:24:38 -07:00
video OMAPDSS: fix regression with display sysfs files 2015-02-26 10:23:15 +02:00
virt
…
virtio virtio_mmio: fix access width for mmio 2015-03-17 12:12:21 +10:30
vlynq
…
vme
…
w1
…
watchdog watchdog: imgpdc: Fix default heartbeat 2015-03-27 08:47:50 +01:00
xen xen: regression fixes for 4.0-rc6 2015-04-02 13:53:53 -07:00
zorro
…
Kconfig i2o: move to staging 2015-02-03 15:58:39 -08:00
Makefile
…