Robert Becker 1e50915fe0 raid: improve MD/raid10 handling of correctable read errors. ... We've noticed severe lasting performance degradation of our raid arrays when we have drives that yield large amounts of media errors. The raid10 module will queue each failed read for retry, and also will attempt call fix_read_error() to perform the read recovery. Read recovery is performed while the array is frozen, so repeated recovery attempts can degrade the performance of the array for extended periods of time. With this patch I propose adding a per md device max number of corrected read attempts. Each rdev will maintain a count of read correction attempts in the rdev->read_errors field (not used currently for raid10). When we enter fix_read_error() we'll check to see when the last read error occurred, and divide the read error count by 2 for every hour since the last read error. If at that point our read error count exceeds the read error threshold, we'll fail the raid device. In addition in this patch I add sysfs nodes (get/set) for the per md max_read_errors attribute, the rdev->read_errors attribute, and added some printk's to indicate when fix_read_error fails to repair an rdev. For testing I used debugfs->fail_make_request to inject IO errors to the rdev while doing IO to the raid array. Signed-off-by: Robert Becker <Rob.Becker@riverbed.com> Signed-off-by: NeilBrown <neilb@suse.de>		2009-12-14 12:51:41 +11:00
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accessibility	…
acpi	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq	2009-12-11 15:59:23 -08:00
amba	…
ata	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2009-12-12 14:27:24 -08:00
atm	Merge branch 'master' of /home/davem/src/GIT/linux-2.6/	2009-12-11 17:12:17 -08:00
auxdisplay	…
base	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2009-12-12 14:27:24 -08:00
block	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2009-12-12 14:27:24 -08:00
bluetooth	USB: remove the auto_pm flag	2009-12-11 11:55:21 -08:00
cdrom	Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6	2009-12-09 19:03:16 -08:00
char	tty: Fix BKL taken under a spinlock bug introduced in the BKL split	2009-12-12 14:46:21 -08:00
clocksource	…
connector	…
cpufreq	[ACPI/CPUFREQ] Introduce bios_limit per cpu cpufreq sysfs interface	2009-11-24 13:33:34 -05:00
cpuidle	…
crypto	Merge branch 'for-next' into for-linus	2009-12-07 18:36:35 +01:00
dca	…
dio	m68k: don't export static inline functions	2009-12-06 11:18:28 +01:00
dma	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
edac	amd64_edac: bump driver version	2009-12-08 13:38:14 +01:00
eisa	…
firewire	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6	2009-12-11 15:22:27 -08:00
firmware	firmware_class: make request_firmware_nowait more useful	2009-12-11 11:24:52 -08:00
gpio	gpio: Langwell GPIO driver bugfixes	2009-12-01 16:32:19 -08:00
gpu	Merge branch 'drm-nouveau-pony' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6	2009-12-11 14:32:49 -08:00
hid	USB: remove the auto_pm flag	2009-12-11 11:55:21 -08:00
hwmon	Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging	2009-12-09 19:53:11 -08:00
i2c	Merge branch 'acpica' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6	2009-12-09 19:57:06 -08:00
ide	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2009-12-12 14:27:24 -08:00
idle	…
ieee1394	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
ieee802154	ieee802154: merge cleanup	2009-12-02 01:13:11 -08:00
infiniband	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
input	Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6	2009-12-11 12:18:16 -08:00
isdn	Merge branch 'master' of /home/davem/src/GIT/linux-2.6/	2009-12-11 17:12:17 -08:00
leds	Merge branch 'ixp4xx' of git://git.kernel.org/pub/scm/linux/kernel/git/chris/linux-2.6	2009-12-12 15:22:22 -08:00
lguest	…
macintosh	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2009-12-12 14:27:24 -08:00
mca	…
md	raid: improve MD/raid10 handling of correctable read errors.	2009-12-14 12:51:41 +11:00
media	V4L/DVB (13592): max2165: 32bit build patch	2009-12-10 12:45:18 -02:00
memstick	…
message	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
mfd	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2009-12-09 19:52:01 -08:00
misc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6	2009-12-11 15:24:56 -08:00
mmc	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2009-12-12 14:27:24 -08:00
mtd	Merge git://git.infradead.org/ubifs-2.6	2009-12-10 09:31:45 -08:00
net	Merge branch 'ixp4xx' of git://git.kernel.org/pub/scm/linux/kernel/git/chris/linux-2.6	2009-12-12 15:22:22 -08:00
nubus	…
of	Merge commit 'origin/master' into next	2009-12-09 17:14:38 +11:00
oprofile	…
parisc	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
parport	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k	2009-12-08 08:13:35 -08:00
pci	Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6	2009-12-11 12:18:16 -08:00
pcmcia	Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6	2009-12-11 12:18:16 -08:00
platform	Merge branch 'acpica' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6	2009-12-09 19:57:06 -08:00
pnp	Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6	2009-12-11 12:18:16 -08:00
power	collie: add battery driver	2009-11-27 21:07:23 +01:00
pps	pps: events reporting fix up	2009-11-12 07:26:01 -08:00
ps3	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
rapidio	…
regulator	regulator: Initialise wm831x structure pointor for ISINK driver	2009-12-02 19:37:16 +00:00
rtc	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
s390	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
sbus	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
scsi	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
serial	Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6	2009-12-11 15:34:40 -08:00
sfi	…
sh	sh: pfc: pr_info() -> pr_debug() cleanups.	2009-11-30 12:15:04 +09:00
sn	…
spi	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2009-12-12 14:27:24 -08:00
ssb	Merge branch 'master' of /home/davem/src/GIT/linux-2.6/	2009-12-05 15:22:26 -08:00
staging	Staging: batman: fix debug Kconfig option	2009-12-11 15:49:27 -08:00
tc	…
telephony	Merge branch 'for-next' into for-linus	2009-12-07 18:36:35 +01:00
thermal	…
uio	uio: pm_runtime_disable is needed if failed	2009-11-13 11:36:00 +09:00
usb	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2009-12-12 14:27:24 -08:00
uwb	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
video	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2009-12-12 14:27:24 -08:00
virtio	…
vlynq	…
w1	…
watchdog	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2009-12-12 14:27:24 -08:00
xen	Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6	2009-12-11 12:18:16 -08:00
zorro	m68k: don't export static inline functions	2009-12-06 11:18:28 +01:00
Kconfig	…
Makefile	…