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GFS2: Fix glock ref counting bug

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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>
This commit is contained in:
Steven Whitehouse 2009-04-30 14:52:58 +01:00
parent 091bf7624d
commit 0c7a531a20
1 changed files with 1 additions and 0 deletions
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fs/gfs2/glock.c
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@ -1304,6 +1304,7 @@ static int gfs2_shrink_glock_memory(int nr, gfp_t gfp_mask)
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)