ocfs2 patch to track delayed orphan scan timer statistics

Patch to track delayed orphan scan timer statistics.

Modifies ocfs2_osb_dump to print the following:
  Orphan Scan=> Local: 10  Global: 21  Last Scan: 67 seconds ago

Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 1fde52c96d25..ab285be023b2 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -156,7 +156,9 @@ struct ocfs2_orphan_scan {
         struct ocfs2_super      *os_osb;
         struct ocfs2_lock_res   os_lockres;     /* lock to synchronize scans */
         struct delayed_work     os_orphan_scan_work;
-        u32                     os_seqno;       /* incremented on every scan */
+        struct timespec         os_scantime;  /* time this node ran the scan */
+        u32                     os_count;      /* tracks node specific scans */
+        u32                     os_seqno;       /* tracks cluster wide scans */
 };
 
 struct ocfs2_dlm_debug {