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Message-Id: <1283509796-1510-34-git-send-email-tj@kernel.org>
Date: Fri, 3 Sep 2010 12:29:48 +0200
From: Tejun Heo <tj@...nel.org>
To: jaxboe@...ionio.com, linux-kernel@...r.kernel.org,
linux-fsdevel@...r.kernel.org, linux-scsi@...r.kernel.org,
linux-ide@...r.kernel.org, linux-raid@...r.kernel.org,
dm-devel@...hat.com, hch@....de, konishi.ryusuke@....ntt.co.jp,
James.Bottomley@...e.de, tytso@....edu, chris.mason@...cle.com,
swhiteho@...hat.com, vst@...b.net, jack@...e.cz,
rwheeler@...hat.com, hare@...e.de, neilb@...e.de,
rusty@...tcorp.com.au, mst@...hat.com, snitzer@...hat.com,
k-ueda@...jp.nec.com, mpatocka@...hat.com
Cc: Christoph Hellwig <hch@...radead.org>, Tejun Heo <tj@...nel.org>
Subject: [PATCH 33/41] jbd: replace barriers with explicit flush / FUA usage
From: Christoph Hellwig <hch@...radead.org>
Switch to the WRITE_FLUSH_FUA flag for journal commits and remove the
EOPNOTSUPP detection for barriers.
Signed-off-by: Christoph Hellwig <hch@....de>
Acked-by: Jan Kara <jack@...e.cz>
Signed-off-by: Tejun Heo <tj@...nel.org>
---
fs/jbd/commit.c | 30 +++---------------------------
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);
--
1.7.1
--
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