Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 349f429e authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

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: default avatarChristoph Hellwig <hch@lst.de>
Acked-by: default avatarHugh Dickins <hughd@google.com>
Tested-by: default avatarNigel Cunningham <nigel@tuxonice.net>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatarJens Axboe <jaxboe@fusionio.com>
parent e045db80

mm/swapfile.c

+3 −6
Original line number Diff line number Diff line
@@ -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;

		}