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| author | Christoph Hellwig <hch@infradead.org> | 2010-09-09 16:38:10 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-09-20 13:36:29 -0700 |
| commit | 697c5a83eae7228e8591bbbf0f88dbbb73d281f7 (patch) | |
| tree | 76d38cc7a48080bfa0f68bbf97fe9036e120a2d1 /README | |
| parent | eb5b5fb7667d74ceeb3c409e20ac0340f48c9d20 (diff) | |
swap: do not send discards as barriers
commit 8f2ae0faa3a119158c4dcfe89926d6fad5f5332c upstream.
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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'README')
0 files changed, 0 insertions, 0 deletions