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authorChristoph Hellwig <hch@infradead.org>2010-08-18 05:29:16 -0400
committerJens Axboe <jaxboe@fusionio.com>2010-09-10 12:35:39 +0200
commit4524451ef7e88c64a868a8f5a0b49bda73beb2a3 (patch)
treee9bf7e18153216f0a0366d5ae99d0f2cf96d6554 /fs/jbd
parentf8c131f5b6ffc899a70b30e541f367d47f89691c (diff)
downloadop-kernel-dev-4524451ef7e88c64a868a8f5a0b49bda73beb2a3.zip
op-kernel-dev-4524451ef7e88c64a868a8f5a0b49bda73beb2a3.tar.gz
jbd: replace barriers with explicit flush / FUA usage
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>
Diffstat (limited to 'fs/jbd')
-rw-r--r--fs/jbd/commit.c30
1 files changed, 3 insertions, 27 deletions
diff --git a/fs/jbd/commit.c b/fs/jbd/commit.c
index 95d8c11..484c5e5 100644
--- a/fs/jbd/commit.c
+++ b/fs/jbd/commit.c
@@ -137,34 +137,10 @@ static int journal_write_commit_record(journal_t *journal,
JBUFFER_TRACE(descriptor, "write commit block");
set_buffer_dirty(bh);
- if (journal->j_flags & JFS_BARRIER) {
- ret = __sync_dirty_buffer(bh, WRITE_SYNC | WRITE_BARRIER);
-
- /*
- * Is it possible for another commit to fail at roughly
- * the same time as this one? If so, we don't want to
- * trust the barrier flag in the super, but instead want
- * to remember if we sent a barrier request
- */
- if (ret == -EOPNOTSUPP) {
- char b[BDEVNAME_SIZE];
-
- printk(KERN_WARNING
- "JBD: barrier-based sync failed on %s - "
- "disabling barriers\n",
- bdevname(journal->j_dev, b));
- spin_lock(&journal->j_state_lock);
- journal->j_flags &= ~JFS_BARRIER;
- spin_unlock(&journal->j_state_lock);
-
- /* And try again, without the barrier */
- set_buffer_uptodate(bh);
- set_buffer_dirty(bh);
- ret = sync_dirty_buffer(bh);
- }
- } else {
+ if (journal->j_flags & JFS_BARRIER)
+ ret = __sync_dirty_buffer(bh, WRITE_SYNC | WRITE_FLUSH_FUA);
+ else
ret = sync_dirty_buffer(bh);
- }
put_bh(bh); /* One for getblk() */
journal_put_journal_head(descriptor);
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