GFS2: Fix glock ref counting bug
Depending on the ordering of events as we go around the
glock shrinker loop, it is possible to drop the ref count
of a glock incorrectly. It doesn't happen very often. This
patch corrects the got_ref variable, fixing the problem.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 1afd9f2..ff49810 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -1304,6 +1304,7 @@
nr--;
if (queue_delayed_work(glock_workqueue, &gl->gl_work, 0) == 0)
gfs2_glock_put(gl);
+ got_ref = 0;
}
spin_lock(&lru_lock);
if (may_demote)