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authorSunil Mushran <sunil.mushran@oracle.com>2010-02-02 03:55:50 +0300
committerJoel Becker <joel.becker@oracle.com>2010-02-03 10:51:16 +0300
commitdb0f6ce69776370232431eb8be85a5b18b0019c0 (patch)
treecd3a18bf13fa6dcbf2c59940565ddfaedabcdd89 /fs
parent0d74125a6a68d4f1969ecaf0b3543f315916ccdc (diff)
downloadlinux-db0f6ce69776370232431eb8be85a5b18b0019c0.tar.xz
ocfs2: Remove overzealous BUG_ON during blocked lock processing
During blocked lock processing, we should consider the possibility that the lock is no longer blocking. Joel Becker <joel.becker@oracle.com> assisted in fixing this issue. Reported-by: David Teigland <teigland@redhat.com> Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/ocfs2/dlmglue.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index ac24f49ae2fb..ce8e061c9a22 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -3392,9 +3392,17 @@ static int ocfs2_unblock_lock(struct ocfs2_super *osb,
spin_lock_irqsave(&lockres->l_lock, flags);
- BUG_ON(!(lockres->l_flags & OCFS2_LOCK_BLOCKED));
-
recheck:
+ /*
+ * Is it still blocking? If not, we have no more work to do.
+ */
+ if (!(lockres->l_flags & OCFS2_LOCK_BLOCKED)) {
+ BUG_ON(lockres->l_blocking != DLM_LOCK_NL);
+ spin_unlock_irqrestore(&lockres->l_lock, flags);
+ ret = 0;
+ goto leave;
+ }
+
if (lockres->l_flags & OCFS2_LOCK_BUSY) {
/* XXX
* This is a *big* race. The OCFS2_LOCK_PENDING flag