NeilBrown
6ed3003c19
md: fix an occasional deadlock in raid5 ...
raid5's 'make_request' function calls generic_make_request on underlying
devices and if we run out of stripe heads, it could end up waiting for one of
those requests to complete. This is bad as recursive calls to
generic_make_request go on a queue and are not even attempted until
make_request completes.
So: don't make any generic_make_request calls in raid5 make_request until all
waiting has been done. We do this by simply setting STRIPE_HANDLE instead of
calling handle_stripe().
If we need more stripe_heads, raid5d will get called to process the pending
stripe_heads which will call generic_make_request from a
This change by itself causes a performance hit. So add a change so that
raid5_activate_delayed is only called at unplug time, never in raid5. This
seems to bring back the performance numbers. Calling it in raid5d was
sometimes too soon...
Neil said:
How about we queue it for 2.6.25-rc1 and then about when -rc2 comes out,
we queue it for 2.6.24.y?
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Tested-by: dean gaudet <dean@arctic.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06 10:41:19 -08:00
acorn /char
latency.c: use QoS infrastructure
2008-02-05 09:44:22 -08:00
iommu sg merging: sata_inic162x: use pci_set_dma_max_seg_size
2008-02-05 09:44:11 -08:00
register_cpu __devinit or __cpuinit
2008-02-06 10:41:01 -08:00
Atari floppy: Rename disk_type to atari_disk_type
2008-02-06 10:41:10 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
2008-02-05 10:09:07 -08:00
drivers/cdrom/cdrom.c: simplify logic in cdrom_release()
2008-02-06 10:41:10 -08:00
ip27-rtc: convert ioctl to unlocked_ioctl
2008-02-06 10:41:14 -08:00
pm qos infrastructure and interface
2008-02-05 09:44:22 -08:00
dio: ARRAY_SIZE() cleanup
2008-02-05 09:44:23 -08:00
drivers/edac/: Spelling fixes
2008-02-03 17:12:34 +02:00
dcdbas: add DMI-based module autloading
2008-02-06 10:41:01 -08:00
gpio: handle pca953{4,5,6,7,8} too
2008-02-06 10:41:15 -08:00
deprecate obsolete pca9539 driver
2008-02-05 09:44:13 -08:00
cleanup after APUS removal
2008-02-06 10:41:01 -08:00
ieee1394: sbp2: fix bogus s/g access change
2008-02-02 13:48:16 +01:00
RDMA/nes: Add a driver for NetEffect RNICs
2008-02-04 20:20:45 -08:00
Remove pointless casts from void pointers
2008-02-06 10:41:01 -08:00
drivers/isdn/hardware/eicon/debug.c: fix uninitialized var warning
2008-02-06 10:41:12 -08:00
leds: add possibility to remove leds classdevs during suspend/resume
2008-02-05 09:44:23 -08:00
virtio: reset function
2008-02-04 23:50:03 +11:00
ppc: fix #ifdef-s in mediabay driver (take 2)
2008-02-06 02:57:50 +01:00
md: fix an occasional deadlock in raid5
2008-02-06 10:41:19 -08:00
scheduled OSS driver removal
2008-02-06 10:41:02 -08:00
drivers/message/: Spelling fixes
2008-02-03 17:21:01 +02:00
phantom: don't grab other devices
2008-02-06 10:41:10 -08:00
Claim maintainership for block2mtd and update email addresses
2008-02-06 10:41:09 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
2008-02-05 10:09:07 -08:00
nubus: kill drivers/nubus/nubus_syms.c
2008-02-05 09:44:23 -08:00
iommu sg merging: parisc: make iommu respect the segment size limits
2008-02-05 09:44:10 -08:00
parport_pc: detection for SuperIO IT87XX POST
2008-02-06 10:41:08 -08:00
Genericizing iova.[ch]
2008-02-06 10:41:01 -08:00
drivers/pcmcia: add missing pci_dev_get
2008-02-05 09:44:09 -08:00
apm_power: check I.intval for zero value, we use it as the divisor
2008-02-02 02:44:34 +03:00
ps3: use symbolic names for video modes
2008-02-06 10:41:17 -08:00
rtc: at91sam9 RTC support (RTT and/or RTC)
2008-02-06 10:41:14 -08:00
calibrate_delay() must be __cpuinit
2008-02-06 10:41:08 -08:00
cleanup after APUS removal
2008-02-06 10:41:01 -08:00
SC26XX: New serial driver for SC2681 uarts
2008-02-06 10:41:06 -08:00
spi: remove more dev->power.power_state usage
2008-02-06 10:41:11 -08:00
drivers/ssb/: Spelling fixes
2008-02-03 17:30:25 +02:00
uio: nopage
2008-02-06 10:41:07 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/pci-2.6
2008-02-02 14:29:33 +11:00
fbcon: fix color generation for monochrome framebuffer
2008-02-06 10:41:18 -08:00
virtio: balloon driver
2008-02-04 23:50:13 +11:00
w1-gpio: add GPIO w1 bus master driver
2008-02-06 10:41:15 -08:00
drivers/watchdog/: Spelling fixes
2008-02-03 17:32:52 +02:00
gpiolib: add drivers/gpio directory
2008-02-05 09:44:12 -08:00
gpiolib: add drivers/gpio directory
2008-02-05 09:44:12 -08:00
6ed3003c19