Re: [PATCH 24.5/30] jbd2: Modify ASYNC_COMMIT code to not rely onqueue draining on barrier
From: Sergei Shtylyov
Date: Thu Aug 26 2010 - 05:35:20 EST
Hello.
Tejun Heo wrote:
From 49f4cef00a1bd3c79fb2fe1f982c5157f0792867 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@xxxxxxx>
Currently JBD2 relies blkdev_issue_flush() draining the queue when ASYNC_COMMIT
feature is set. This property is going away so make JBD2 wait for buffers it
needs on its own before submitting the cache flush.
Signed-off-by: Jan Kara <jack@xxxxxxx>
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
---
This patch is necessary before enabling flush/fua support in jbd2.
The flush-fua git tree has been udpated to included this between patch
24 and 25.
Thanks.
fs/jbd2/commit.c | 29 ++++++++++++++++-------------
1 files changed, 16 insertions(+), 13 deletions(-)
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 7c068c1..8797fd1 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
[...]
@@ -845,6 +842,12 @@ wait_for_iobuf:
}
if (!err && !is_journal_aborted(journal))
err = journal_wait_on_commit_record(journal, cbh);
+ if (JBD2_HAS_INCOMPAT_FEATURE(journal,
+ JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT) &&
+ journal->j_flags & JBD2_BARRIER) {
+ blkdev_issue_flush(journal->j_dev, GFP_KERNEL, NULL,
Overindented line.
+ BLKDEV_IFL_WAIT);
+ }
if (err)
jbd2_journal_abort(journal, err);
WBR, Sergei
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