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ocfs2/dlm: dlm_thread should not sleep while holding the dlm_spinlock 

This patch addresses the bug in which the dlm_thread could go to sleep
while holding the dlm_spinlock.

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Sunil Mushran 2008-03-01 14:04:25 -08:00 committed by Mark Fasheh
parent 535f7026fd
commit c824c3c723
1 changed files with 4 additions and 2 deletions
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6
fs/ocfs2/dlm/dlmthread.c
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@ -176,12 +176,14 @@ static int dlm_purge_lockres(struct dlm_ctxt *dlm,
res->lockname.name, master);
if (!master) {
/* drop spinlock... retake below */
spin_unlock(&dlm->spinlock);
spin_lock(&res->spinlock);
/* This ensures that clear refmap is sent after the set */
__dlm_wait_on_lockres_flags(res, DLM_LOCK_RES_SETREF_INPROG);
spin_unlock(&res->spinlock);
/* drop spinlock to do messaging, retake below */
spin_unlock(&dlm->spinlock);
/* clear our bit from the master's refmap, ignore errors */
ret = dlm_drop_lockres_ref(dlm, res);
if (ret < 0) {