[GFS2] Only wake the reclaim daemon if we need to

This patch only wakes up the glock reclaim daemon if there is
actually something to be reclaimed.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 7175a4d064356f6f36860ea57d24feed1acb3d0e..5752dec017c13ac321107582d608306ccfc18e6d 100644 (file)
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -1594,10 +1594,10 @@ void gfs2_glock_schedule_for_reclaim(struct gfs2_glock *gl)
                gfs2_glock_hold(gl);
                list_add(&gl->gl_reclaim, &sdp->sd_reclaim_list);
                atomic_inc(&sdp->sd_reclaim_count);
-       }
-       spin_unlock(&sdp->sd_reclaim_lock);
-
-       wake_up(&sdp->sd_reclaim_wq);
+               spin_unlock(&sdp->sd_reclaim_lock);
+               wake_up(&sdp->sd_reclaim_wq);
+       } else
+               spin_unlock(&sdp->sd_reclaim_lock);
 }
 
 /**