diff options
| author | Christoph Hellwig <hch@infradead.org> | 2010-08-18 05:29:20 -0400 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2010-09-10 12:35:39 +0200 |
| commit | 349f429eec36cb743fee20f4c193ecde97a3ed2e (patch) | |
| tree | c4618700a2bbb4b7954f048155a095808d69dc45 /mm/swapfile.c | |
| parent | e045db80d07250312500b2ed707b84dc703189d6 (diff) | |
| download | lwn-349f429eec36cb743fee20f4c193ecde97a3ed2e.tar.gz lwn-349f429eec36cb743fee20f4c193ecde97a3ed2e.zip | |
swap: do not send discards as barriers
The swap code already uses synchronous discards, no need to add I/O barriers.
tj: superflous newlines removed.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Hugh Dickins <hughd@google.com>
Tested-by: Nigel Cunningham <nigel@tuxonice.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'mm/swapfile.c')
| -rw-r--r-- | mm/swapfile.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c index 1f3f9c59a73a..68cda164dff6 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -141,8 +141,7 @@ static int discard_swap(struct swap_info_struct *si) nr_blocks = ((sector_t)se->nr_pages - 1) << (PAGE_SHIFT - 9); if (nr_blocks) { err = blkdev_issue_discard(si->bdev, start_block, - nr_blocks, GFP_KERNEL, - BLKDEV_IFL_WAIT | BLKDEV_IFL_BARRIER); + nr_blocks, GFP_KERNEL, BLKDEV_IFL_WAIT); if (err) return err; cond_resched(); @@ -153,8 +152,7 @@ static int discard_swap(struct swap_info_struct *si) nr_blocks = (sector_t)se->nr_pages << (PAGE_SHIFT - 9); err = blkdev_issue_discard(si->bdev, start_block, - nr_blocks, GFP_KERNEL, - BLKDEV_IFL_WAIT | BLKDEV_IFL_BARRIER); + nr_blocks, GFP_KERNEL, BLKDEV_IFL_WAIT); if (err) break; @@ -193,8 +191,7 @@ static void discard_swap_cluster(struct swap_info_struct *si, start_block <<= PAGE_SHIFT - 9; nr_blocks <<= PAGE_SHIFT - 9; if (blkdev_issue_discard(si->bdev, start_block, - nr_blocks, GFP_NOIO, BLKDEV_IFL_WAIT | - BLKDEV_IFL_BARRIER)) + nr_blocks, GFP_NOIO, BLKDEV_IFL_WAIT)) break; } |