NeilBrown 2a2275d630 [PATCH] md: fix potential memalloc deadlock in md ...

If a GFP_KERNEL allocation is attempted in md while the mddev_lock is held,
it is possible for a deadlock to eventuate.

This happens if the array was marked 'clean', and the memalloc triggers a
write-out to the md device.

For the writeout to succeed, the array must be marked 'dirty', and that
requires getting the mddev_lock.

So, before attempting a GFP_KERNEL allocation while holding the lock, make
sure the array is marked 'dirty' (unless it is currently read-only).

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2007-01-26 13:51:00 -08:00

..

raid6test

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.gitignore

gitignore: misc files

2006-01-01 22:21:50 +01:00

bitmap.c

[PATCH] md: avoid reading past the end of a bitmap file

2007-01-26 13:50:59 -08:00

dm-bio-list.h

[PATCH] dm: suspend: add noflush pushback

2006-12-08 08:29:09 -08:00

dm-bio-record.h

…

dm-crypt.c

[PATCH] dm: map and endio symbolic return codes

2006-12-08 08:29:09 -08:00

dm-emc.c

[PATCH] struct path: rename DM's struct path

2006-12-08 08:28:40 -08:00

dm-exception-store.c

[PATCH] dm snapshot: fix metadata writing when suspending

2006-10-03 08:04:14 -07:00

dm-hw-handler.c

BUG_ON() Conversion in md/dm-hw-handler.c

2006-03-24 18:36:27 +01:00

dm-hw-handler.h

[PATCH] struct path: rename DM's struct path

2006-12-08 08:28:40 -08:00

dm-io.c

[PATCH] dm io: fix bi_max_vecs

2006-12-08 08:29:08 -08:00

dm-io.h

[PATCH] device-mapper: remove unused definition

2006-01-06 08:34:00 -08:00

dm-ioctl.c

[PATCH] dm: ioctl: add noflush suspend

2006-12-08 08:29:09 -08:00

dm-linear.c

[PATCH] dm: map and endio symbolic return codes

2006-12-08 08:29:09 -08:00

dm-log.c

[PATCH] dm: raid1: reset sync_search on resume

2006-12-08 08:29:09 -08:00

dm-log.h

[PATCH] dm: log: rename complete_resync_work

2006-12-08 08:29:09 -08:00

dm-mpath.c

[PATCH] dm: mpath: use noflush suspending

2006-12-08 08:29:09 -08:00

dm-mpath.h

[PATCH] struct path: rename DM's struct path

2006-12-08 08:28:40 -08:00

dm-path-selector.c

BUG_ON() Conversion in md/dm-path-selector.c

2006-03-26 18:21:58 +02:00

dm-path-selector.h

[PATCH] struct path: rename DM's struct path

2006-12-08 08:28:40 -08:00

dm-raid1.c

[PATCH] dm: log: rename complete_resync_work

2006-12-08 08:29:09 -08:00

dm-round-robin.c

[PATCH] struct path: rename DM's struct path

2006-12-08 08:28:40 -08:00

dm-snap.c

[PATCH] make drivers/md/dm-snap.c:ksnapd static

2006-12-08 08:29:09 -08:00

dm-snap.h

[PATCH] dm snapshot: add workqueue

2006-10-03 08:04:14 -07:00

dm-stripe.c

[PATCH] dm: map and endio symbolic return codes

2006-12-08 08:29:09 -08:00

dm-table.c

[PATCH] dm table: add target flush

2006-10-03 08:04:16 -07:00

dm-target.c

[PATCH] dm: improve error message consistency

2006-06-26 09:58:36 -07:00

dm-zero.c

[PATCH] dm: map and endio symbolic return codes

2006-12-08 08:29:09 -08:00

dm.c

[PATCH] dm-multipath: fix stall on noflush suspend/resume

2007-01-26 13:51:00 -08:00

dm.h

[PATCH] dm: suspend: add noflush pushback

2006-12-08 08:29:09 -08:00

faulty.c

[PATCH] md: Don't assume that READ==0 and WRITE==1 - use the names explicitly

2006-12-13 09:05:48 -08:00

Kconfig

[CRYPTO] dm-crypt: Select CRYPTO_CBC

2006-12-10 10:18:57 -08:00

kcopyd.c

[PATCH] slab: remove kmem_cache_t

2006-12-07 08:39:25 -08:00

kcopyd.h

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linear.c

[PATCH] md: define backing_dev_info.congested_fn for raid0 and linear

2006-10-03 08:04:18 -07:00

Makefile

[PATCH] md: merge raid5 and raid6 code

2006-06-26 09:58:37 -07:00

md.c

[PATCH] md: fix potential memalloc deadlock in md

2007-01-26 13:51:00 -08:00

mktables.c

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multipath.c

[PATCH] md: fix up maintenance of ->degraded in multipath

2006-10-28 11:30:51 -07:00

raid0.c

[PATCH] md: define backing_dev_info.congested_fn for raid0 and linear

2006-10-03 08:04:18 -07:00

raid1.c

[PATCH] md: fix potential memalloc deadlock in md

2007-01-26 13:51:00 -08:00

raid5.c

[PATCH] md: fix potential memalloc deadlock in md

2007-01-26 13:51:00 -08:00

raid6.h

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raid6algos.c

[PATCH] drivers/md/raid6algos.c: fix a NULL dereference

2006-06-23 07:43:08 -07:00

raid6altivec.uc

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raid6int.uc

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raid6mmx.c

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raid6recov.c

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raid6sse1.c

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raid6sse2.c

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raid6x86.h

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raid10.c

[PATCH] md: pass down BIO_RW_SYNC in raid{1,10}

2007-01-11 18:18:21 -08:00

unroll.pl

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xor.c

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