JFS: Improve sync barrier processing

Under heavy load, hot metadata pages are often locked by non-committed
transactions, making them difficult to flush to disk.  This prevents
the sync point from advancing past a transaction that had modified the
page.

There is a point during the sync barrier processing where all
outstanding transactions have been committed to disk, but no new
transaction have been allowed to proceed.  This is the best time
to write the metadata.

Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index ee32211..c2abdae 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -531,7 +531,7 @@ static int jfs_sync_fs(struct super_block *sb, int wait)
 	/* log == NULL indicates read-only mount */
 	if (log) {
 		jfs_flush_journal(log, wait);
-		jfs_syncpt(log);
+		jfs_syncpt(log, 0);
 	}
 
 	return 0;