[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, 9 insertions, 5 deletions

diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c
index bbc9c1407b55..e93d01aa12c4 100644
--- a/fs/jfs/jfs_txnmgr.c
+++ b/fs/jfs/jfs_txnmgr.c
@@ -567,9 +567,6 @@ void txEnd(tid_t tid)
                  * synchronize with logsync barrier
                  */
                 if (test_bit(log_SYNCBARRIER, &log->flag)) {
-                        /* forward log syncpt */
-                        /* lmSync(log); */
-
                         jfs_info("log barrier off: 0x%x", log->lsn);
 
                         /* enable new transactions start */
@@ -577,15 +574,22 @@ void txEnd(tid_t tid)
 
                         /* wakeup all waitors for logsync barrier */
                         TXN_WAKEUP(&log->syncwait);
+
+                        TXN_UNLOCK();
+
+                        /* forward log syncpt */
+                        jfs_syncpt(log);
+
+                        goto wakeup;
                 }
         }
 
+        TXN_UNLOCK();
+wakeup:
         /*
          * wakeup all waitors for a free tblock
          */
         TXN_WAKEUP(&TxAnchor.freewait);
-
-        TXN_UNLOCK();
 }