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btrfs: replace barriers with explicit flush / FUA usage

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Switch to the WRITE_FLUSH_FUA flag for log writes, remove the EOPNOTSUPP
detection for barriers and stop setting the barrier flag for discards.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Chris Mason <chris.mason@oracle.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Christoph Hellwig
2010-08-18 05:29:12 -04:00
committed by Jens Axboe
parent 80f6c29d8a
commit c3b9a62c8f
4 changed files with 5 additions and 21 deletions
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fs/btrfs/extent-tree.c
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@@ -1696,7 +1696,7 @@ static void btrfs_issue_discard(struct block_device *bdev,
u64 start, u64 len)
{
blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_KERNEL,
BLKDEV_IFL_WAIT | BLKDEV_IFL_BARRIER);
BLKDEV_IFL_WAIT);
}
static int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,