AcoSail/kernel_optimize_test
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06386bbfd2
kernel_optimize_test/drivers
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Jonathan Brassow 06386bbfd2 dm raid1: handle read failures 
This patch gives the ability to respond-to/record device failures
that happen during read operations.  It also adds the ability to
read from mirror devices that are not the primary if they are
in-sync.

There are essentially two read paths in mirroring; the direct path
and the queued path.  When a read request is mapped, if the region
is 'in-sync' the direct path is taken; otherwise the queued path
is taken.

If the direct path is taken, we must record bio information so that
if the read fails we can retry it.  We then discover the status of
a direct read through mirror_end_io.  If the read has failed, we will
mark the device from which the read was attempted as failed (so we
don't try to read from it again), restore the bio and try again.

If the queued path is taken, we discover the results of the read
from 'read_callback'.  If the device failed, we will mark the device
as failed and attempt the read again if there is another device
where this region is known to be 'in-sync'.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2008-02-08 02:11:37 +00:00
..
acorn/char
acpi ACPI: fix build warning 2008-02-07 04:24:01 -05:00
amba
ata ata_piix.c:piix_init_one() must be __devinit 2008-02-06 07:01:56 -05:00
atm
auxdisplay
base Driver core: Revert "Fix Firmware class name collision" 2008-02-07 11:31:46 -08:00
block Merge branch 'for-2.6.25' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2008-02-07 09:02:26 -08:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-02-05 10:09:07 -08:00
cdrom Merge branch 'for-2.6.25' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2008-02-07 09:02:26 -08:00
char Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2008-02-07 12:57:44 -08:00
clocksource
connector
cpufreq [CPUFREQ] fix configuration help message 2008-02-06 22:57:58 -05:00
cpuidle Revert "cpuidle: build fix for non-x86" 2008-02-07 04:16:34 -05:00
crypto
dca
dio dio: ARRAY_SIZE() cleanup 2008-02-05 09:44:23 -08:00
dma async_tx: replace 'int_en' with operation preparation flags 2008-02-06 10:12:18 -07:00
edac drivers/edac/i3000: document type promotion 2008-02-07 08:42:23 -08:00
eisa
firewire
firmware Merge branches 'release' and 'dmi' into release 2008-02-07 03:11:31 -05:00
gpio gpio: handle pca953{4,5,6,7,8} too 2008-02-06 10:41:15 -08:00
hid
hwmon leds: Standardise LED naming scheme 2008-02-07 09:47:00 +00:00
i2c deprecate obsolete pca9539 driver 2008-02-05 09:44:13 -08:00
ide Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev 2008-02-06 10:47:46 -08:00
ieee1394 ieee1394: sbp2: fix bogus s/g access change 2008-02-02 13:48:16 +01:00
infiniband RDMA/nes: Add a driver for NetEffect RNICs 2008-02-04 20:20:45 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2008-02-07 12:57:44 -08:00
isdn drivers/isdn/hardware/eicon/debug.c: fix uninitialized var warning 2008-02-06 10:41:12 -08:00
leds leds: Add HP Jornada 6xx driver 2008-02-07 10:10:28 +00:00
lguest virtio: reset function 2008-02-04 23:50:03 +11:00
macintosh ppc: fix #ifdef-s in mediabay driver (take 2) 2008-02-06 02:57:50 +01:00
mca
md dm raid1: handle read failures 2008-02-08 02:11:37 +00:00
media Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2008-02-07 12:57:44 -08:00
message drivers/message/: Spelling fixes 2008-02-03 17:21:01 +02:00
mfd ASIC3 driver 2008-02-07 08:42:23 -08:00
misc Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2008-02-07 09:45:58 -08:00
mmc
mtd Merge git://git.infradead.org/mtd-2.6 2008-02-07 10:20:31 -08:00
net Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds 2008-02-07 09:45:14 -08:00
nubus nubus: kill drivers/nubus/nubus_syms.c 2008-02-05 09:44:23 -08:00
of [POWERPC] Create and hook up of_platform_device_shutdown 2008-02-06 16:29:59 +11:00
oprofile
parisc iommu sg merging: parisc: make iommu respect the segment size limits 2008-02-05 09:44:10 -08:00
parport parport_pc: detection for SuperIO IT87XX POST 2008-02-06 10:41:08 -08:00
pci Genericizing iova.[ch] 2008-02-06 10:41:01 -08:00
pcmcia drivers/pcmcia: add missing pci_dev_get 2008-02-05 09:44:09 -08:00
pnp Merge branches 'release', 'bugzilla-6217', 'bugzilla-6629', 'bugzilla-6933', 'bugzilla-7186', 'bugzilla-8269', 'bugzilla-8570', 'bugzilla-9139', 'bugzilla-9277', 'bugzilla-9341', 'bugzilla-9444', 'bugzilla-9614', 'bugzilla-9643' and 'bugzilla-9644' into release 2008-02-07 03:09:43 -05:00
power Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2008-02-07 09:45:58 -08:00
ps3 ps3: use symbolic names for video modes 2008-02-06 10:41:17 -08:00
rapidio
rtc rtc: at91sam9 RTC support (RTT and/or RTC) 2008-02-06 10:41:14 -08:00
s390 calibrate_delay() must be __cpuinit 2008-02-06 10:41:08 -08:00
sbus
scsi scsi: megaraid: trivial drop duplicate mutex.h include 2008-02-06 11:15:41 -08:00
serial Merge branch 'for-2.6.25' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2008-02-07 09:02:26 -08:00
sh
sn
spi spi: remove more dev->power.power_state usage 2008-02-06 10:41:11 -08:00
ssb drivers/ssb/: Spelling fixes 2008-02-03 17:30:25 +02:00
tc
telephony
thermal the generic thermal sysfs driver 2008-02-01 23:12:19 -05:00
uio uio: nopage 2008-02-06 10:41:07 -08:00
usb Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/pci-2.6 2008-02-02 14:29:33 +11:00
video Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight 2008-02-07 09:45:37 -08:00
virtio virtio: add missing #include <linux/delay.h> 2008-02-06 10:41:21 -08:00
w1 DS1WM: decouple host IRQ and INTR active state settings 2008-02-07 08:42:06 -08:00
watchdog drivers/watchdog/: Spelling fixes 2008-02-03 17:32:52 +02:00
xen
zorro
Kconfig Merge branches 'release' and 'menlo' into release 2008-02-07 03:18:04 -05:00
Makefile Merge branches 'release' and 'menlo' into release 2008-02-07 03:18:04 -05:00