[XFS] Remove periodic logging of in-core superblock counters.

xfssyncd triggers the logging of superblock counters every 30s if the
filesystem is made with lazy-count=1. This will prevent disks from idling
and spinning down as there will be a log write every 30s. With the way
counter recovery works for lazy-count=1, this code is unnecessary and
provides no real benefit, so just remove it.

SGI-PV: 980145
SGI-Modid: xfs-linux-melb:xfs-kern:30840a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Barry Naujok <bnaujok@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

3 files changed, 1 insertions, 16 deletions

diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index fb561beea373..865eb708aa95 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -1028,8 +1028,7 @@ xfs_sync_worker(
         int             error;
 
         if (!(mp->m_flags & XFS_MOUNT_RDONLY))
-                error = xfs_sync(mp, SYNC_FSDATA | SYNC_BDFLUSH | SYNC_ATTR |
-                                     SYNC_REFCACHE | SYNC_SUPER);
+                error = xfs_sync(mp, SYNC_FSDATA | SYNC_BDFLUSH | SYNC_ATTR);
         mp->m_sync_seq++;
         wake_up(&mp->m_wait_single_sync_task);
 }
diff --git a/fs/xfs/linux-2.6/xfs_vfs.h b/fs/xfs/linux-2.6/xfs_vfs.h
index 4da03a4e3520..7e60c7776b1c 100644
--- a/fs/xfs/linux-2.6/xfs_vfs.h
+++ b/fs/xfs/linux-2.6/xfs_vfs.h
@@ -49,7 +49,6 @@ typedef struct bhv_vfs_sync_work {
 #define SYNC_REFCACHE           0x0040  /* prune some of the nfs ref cache */
 #define SYNC_REMOUNT            0x0080  /* remount readonly, no dummy LRs */
 #define SYNC_IOWAIT             0x0100  /* wait for all I/O to complete */
-#define SYNC_SUPER              0x0200  /* flush superblock to disk */
 
 /*
  * When remounting a filesystem read-only or freezing the filesystem,
diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index 09e186d02c11..fc48158fe479 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -1317,21 +1317,8 @@ xfs_syncsub(
         }
 
         /*
-         * If asked, update the disk superblock with incore counter values if we
-         * are using non-persistent counters so that they don't get too far out
-         * of sync if we crash or get a forced shutdown. We don't want to force
-         * this to disk, just get a transaction into the iclogs....
-         */
-        if (flags & SYNC_SUPER) {
-                error = xfs_log_sbcount(mp, 0);
-                if (error)
-                        last_error = error;
-        }
-
-        /*
          * Now check to see if the log needs a "dummy" transaction.
          */
-
         if (!(flags & SYNC_REMOUNT) && xfs_log_need_covered(mp)) {
                 xfs_trans_t *tp;
                 xfs_inode_t *ip;