From: Bob Peterson <rpete...@redhat.com>
This patch closes a small timing window whereby a request to hold the
transaction glock can get stuck. The problem is that after the DLM has
granted the lock, it can get into a state whereby it doesn't transition
the glock to a held state, due to not having requeued the glock state
machine to finish the transition.
Signed-off-by: Bob Peterson <rpete...@redhat.com>
Signed-off-by: Steven Whitehouse <swhit...@redhat.com>
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 52f7478..aec7f73 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -1047,9 +1047,13 @@ int gfs2_glock_nq(struct gfs2_holder *gh)
spin_lock(&gl->gl_spin);
add_to_queue(gh);
- if ((LM_FLAG_NOEXP & gh->gh_flags) &&
- test_and_clear_bit(GLF_FROZEN, &gl->gl_flags))
+ if (unlikely((LM_FLAG_NOEXP & gh->gh_flags) &&
+ test_and_clear_bit(GLF_FROZEN, &gl->gl_flags))) {
set_bit(GLF_REPLY_PENDING, &gl->gl_flags);
+ gl->gl_lockref.count++;
+ if (queue_delayed_work(glock_workqueue, &gl->gl_work, 0) == 0)
+ gl->gl_lockref.count--;
+ }
run_queue(gl, 1);
spin_unlock(&gl->gl_spin);
--
1.8.3.1
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