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| author |   Christoph Hellwig <hch@infradead.org> | 2010-09-09 16:38:10 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2010-09-09 18:57:25 -0700 |
| commit | 8f2ae0faa3a119158c4dcfe89926d6fad5f5332c (patch) | |
| tree | 720272512fd0dfd1d865d2dc64b30fed811f2d13 /include/linux/swap.h | |
| parent | swap: prevent reuse during hibernation (diff) | |
| download | linux-dev-8f2ae0faa3a119158c4dcfe89926d6fad5f5332c.tar.xz linux-dev-8f2ae0faa3a119158c4dcfe89926d6fad5f5332c.zip | |
swap: do not send discards as barriers
The swap code already uses synchronous discards, no need to add I/O
barriers.
This fixes the worst of the terrible slowdown in swap allocation for
hibernation, reported on 2.6.35 by Nigel Cunningham; but does not entirely
eliminate that regression.
[tj@kernel.org: superflous newlines removed]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Nigel Cunningham <nigel@tuxonice.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Jens Axboe <jaxboe@fusionio.com>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/swap.h')
0 files changed, 0 insertions, 0 deletions