diff options
| author | Christoph Hellwig <hch@infradead.org> | 2010-09-09 16:38:10 -0700 |
|---|---|---|
| committer | Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com> | 2010-10-04 14:53:35 +0200 |
| commit | 7e3b7dff61604bacc4095cd9ee2637fc19957c99 (patch) | |
| tree | 4021854f861bcea138b3a675d7ed6b70870af7d6 /fs | |
| parent | 2cca4153175d09b19757bb8e3e3417dd47e3cd05 (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 'fs')
0 files changed, 0 insertions, 0 deletions