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jbd2: replace barriers with explicit flush / FUA usage

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Switch to the WRITE_FLUSH_FUA flag for journal commits and remove the
EOPNOTSUPP detection for barriers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jan Kara <jack@suse.cz>
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 05:29:17 -04:00 committed by Jens Axboe
parent f73bee4985
commit 9c35575bbe
1 changed files with 4 additions and 39 deletions
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43
fs/jbd2/commit.c
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@ -134,25 +134,11 @@ static int journal_submit_commit_record(journal_t *journal,
if (journal->j_flags & JBD2_BARRIER &&
!JBD2_HAS_INCOMPAT_FEATURE(journal,
JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) {
ret = submit_bh(WRITE_SYNC_PLUG | WRITE_BARRIER, bh);
if (ret == -EOPNOTSUPP) {
printk(KERN_WARNING
"JBD2: Disabling barriers on %s, "
"not supported by device\n", journal->j_devname);
write_lock(&journal->j_state_lock);
journal->j_flags &= ~JBD2_BARRIER;
write_unlock(&journal->j_state_lock);
/* And try again, without the barrier */
lock_buffer(bh);
set_buffer_uptodate(bh);
clear_buffer_dirty(bh);
ret = submit_bh(WRITE_SYNC_PLUG, bh);
}
} else {
JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT))
ret = submit_bh(WRITE_SYNC_PLUG | WRITE_FLUSH_FUA, bh);
else
ret = submit_bh(WRITE_SYNC_PLUG, bh);
}
*cbh = bh;
return ret;
}
@ -166,29 +152,8 @@ static int journal_wait_on_commit_record(journal_t *journal,
{
int ret = 0;
retry:
clear_buffer_dirty(bh);
wait_on_buffer(bh);
if (buffer_eopnotsupp(bh) && (journal->j_flags & JBD2_BARRIER)) {
printk(KERN_WARNING
"JBD2: %s: disabling barries on %s - not supported "
"by device\n", __func__, journal->j_devname);
write_lock(&journal->j_state_lock);
journal->j_flags &= ~JBD2_BARRIER;
write_unlock(&journal->j_state_lock);
lock_buffer(bh);
clear_buffer_dirty(bh);
set_buffer_uptodate(bh);
bh->b_end_io = journal_end_buffer_io_sync;
ret = submit_bh(WRITE_SYNC_PLUG, bh);
if (ret) {
unlock_buffer(bh);
return ret;
}
goto retry;
}
if (unlikely(!buffer_uptodate(bh)))
ret = -EIO;