v0.8.1
https://github.com/torvalds/linux
There's a race between shutting down one io scheduler and firing up the next, in which a new io could enter and cause the io scheduler to be invoked with bad or NULL data. To fix this, we need to maintain the queue lock for a bit longer. Unfortunately we cannot do that, since the elevator init requires to be run without the lock held. This isn't easily fixable, without also changing the mempool API. So split the initialization into two parts, and alloc-init operation and an attach operation. Then we can preallocate the io scheduler and related structures, and run the attach inside the lock after we detach the old one. This patch has survived 30 minutes of 1 second io scheduler switching with a very busy io load. Signed-off-by: Jens Axboe <axboe@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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- v2.6.16
- v2.6.15-rc7
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- v2.6.15-rc5
- v2.6.15-rc4
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- v2.6.15
- v2.6.14-rc5
- v2.6.14-rc4
- v2.6.14-rc3
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- v2.6.14-rc1
- v2.6.14
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- v2.6.13
- v2.6.12-rc6
- v2.6.12-rc5
- v2.6.12-rc4
- v2.6.12-rc3
- v2.6.12-rc2
- v2.6.12
- v2.6.11-tree
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[PATCH] elevator switching race
File | Mode | Size |
---|---|---|
Kconfig | -rw-r--r-- | 966 bytes |
Makefile | -rw-r--r-- | 257 bytes |
awacs.c | -rw-r--r-- | 26.1 KB |
awacs.h | -rw-r--r-- | 7.4 KB |
beep.c | -rw-r--r-- | 7.4 KB |
burgundy.c | -rw-r--r-- | 14.6 KB |
burgundy.h | -rw-r--r-- | 3.3 KB |
daca.c | -rw-r--r-- | 7.1 KB |
keywest.c | -rw-r--r-- | 3.3 KB |
pmac.c | -rw-r--r-- | 35.2 KB |
pmac.h | -rw-r--r-- | 5.3 KB |
powermac.c | -rw-r--r-- | 5.5 KB |
toonie.c | -rw-r--r-- | 9.2 KB |
tumbler.c | -rw-r--r-- | 37.6 KB |
tumbler_volume.h | -rw-r--r-- | 6.5 KB |
Computing file changes ...