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authorJan Kara <jack@suse.cz>2010-08-18 15:56:56 +0200
committerJens Axboe <jaxboe@fusionio.com>2010-09-10 12:35:39 +0200
commitf73bee49855fe968e87af18e44f2d17e1e675e74 (patch)
treeb8c4bc3ac8fcc6c2ef066bf641e70b7522392c12 /fs/jbd2
parent4524451ef7e88c64a868a8f5a0b49bda73beb2a3 (diff)
downloadop-kernel-dev-f73bee49855fe968e87af18e44f2d17e1e675e74.zip
op-kernel-dev-f73bee49855fe968e87af18e44f2d17e1e675e74.tar.gz
jbd2: Modify ASYNC_COMMIT code to not rely on queue draining on barrier
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@suse.cz> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'fs/jbd2')
-rw-r--r--fs/jbd2/commit.c29
1 files changed, 16 insertions, 13 deletions
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 7c068c1..d6aeb1f 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -701,6 +701,16 @@ start_journal_io:
}
}
+ err = journal_finish_inode_data_buffers(journal, commit_transaction);
+ if (err) {
+ printk(KERN_WARNING
+ "JBD2: Detected IO errors while flushing file data "
+ "on %s\n", journal->j_devname);
+ if (journal->j_flags & JBD2_ABORT_ON_SYNCDATA_ERR)
+ jbd2_journal_abort(journal, err);
+ err = 0;
+ }
+
/*
* If the journal is not located on the file system device,
* then we must flush the file system device before we issue
@@ -719,19 +729,6 @@ start_journal_io:
&cbh, crc32_sum);
if (err)
__jbd2_journal_abort_hard(journal);
- if (journal->j_flags & JBD2_BARRIER)
- blkdev_issue_flush(journal->j_dev, GFP_KERNEL, NULL,
- BLKDEV_IFL_WAIT);
- }
-
- err = journal_finish_inode_data_buffers(journal, commit_transaction);
- if (err) {
- printk(KERN_WARNING
- "JBD2: Detected IO errors while flushing file data "
- "on %s\n", journal->j_devname);
- if (journal->j_flags & JBD2_ABORT_ON_SYNCDATA_ERR)
- jbd2_journal_abort(journal, err);
- err = 0;
}
/* Lo and behold: we have just managed to send a transaction to
@@ -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,
+ BLKDEV_IFL_WAIT);
+ }
if (err)
jbd2_journal_abort(journal, err);
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