[PATCH] JFS: Write journal sync points more often

This patch adds jfs_syncpt, which calls lmLogSync to write sync points
to the journal both in jfs_sync_fs and when sync barrier processing
completes.

lmLogSync accomplishes two things:  1) it pushes logged-but-dirty
metadata pages to disk, and 2) it writes a sync record to the journal
so that jfs_fsck doesn't need to replay more transactions than is
necessary.

Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 14 insertions, 3 deletions

diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index cfcdad3459dd..dfa1200daa61 100644
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -927,9 +927,8 @@ static void lmPostGC(struct lbuf * bp)
  *      calculate new value of i_nextsync which determines when
  *      this code is called again.
  *
- *      this is called only from lmLog().
- *
- * PARAMETER:   ip      - pointer to logs inode.
+ * PARAMETERS:  log     - log structure
+ *              nosyncwait - 1 if called asynchronously
  *
  * RETURN:      0
  *                      
@@ -1051,6 +1050,18 @@ static int lmLogSync(struct jfs_log * log, int nosyncwait)
         return lsn;
 }
 
+/*
+ * NAME:        jfs_syncpt
+ *
+ * FUNCTION:    write log SYNCPT record for specified log
+ *
+ * PARAMETERS:  log     - log structure
+ */
+void jfs_syncpt(struct jfs_log *log)
+{       LOG_LOCK(log);
+        lmLogSync(log, 1);
+        LOG_UNLOCK(log);
+}
 
 /*
  * NAME:        lmLogOpen()