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gfs2: 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: Steven Whitehouse <swhiteho@redhat.com>
Acked-by: Bob Peterson <rpeterso@redhat.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 05:29:13 -04:00 committed by Jens Axboe
parent c3b9a62c8f
commit f1e4d518c3
2 changed files with 7 additions and 17 deletions
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19
fs/gfs2/log.c
View File

@ -592,22 +592,13 @@ static void log_write_header(struct gfs2_sbd *sdp, u32 flags, int pull)
lh->lh_hash = cpu_to_be32(hash);
bh->b_end_io = end_buffer_write_sync;
if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
goto skip_barrier;
get_bh(bh);
submit_bh(WRITE_BARRIER | REQ_META, bh);
wait_on_buffer(bh);
if (buffer_eopnotsupp(bh)) {
clear_buffer_eopnotsupp(bh);
set_buffer_uptodate(bh);
fs_info(sdp, "barrier sync failed - disabling barriers\n");
set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
lock_buffer(bh);
skip_barrier:
get_bh(bh);
if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
submit_bh(WRITE_SYNC | REQ_META, bh);
wait_on_buffer(bh);
}
else
submit_bh(WRITE_FLUSH_FUA | REQ_META, bh);
wait_on_buffer(bh);
if (!buffer_uptodate(bh))
gfs2_io_error_bh(sdp, bh);
brelse(bh);

5
fs/gfs2/rgrp.c
View File

@ -854,8 +854,7 @@ static void gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset,
if ((start + nr_sects) != blk) {
rv = blkdev_issue_discard(bdev, start,
nr_sects, GFP_NOFS,
BLKDEV_IFL_WAIT |
BLKDEV_IFL_BARRIER);
BLKDEV_IFL_WAIT);
if (rv)
goto fail;
nr_sects = 0;
@ -870,7 +869,7 @@ start_new_extent:
}
if (nr_sects) {
rv = blkdev_issue_discard(bdev, start, nr_sects, GFP_NOFS,
BLKDEV_IFL_WAIT | BLKDEV_IFL_BARRIER);
BLKDEV_IFL_WAIT);
if (rv)
goto fail;
}