Browse Source

Merge tag 'dlm-fixes-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm

Pull dlm fixes from David Teigland:
 "This includes one short patch fixing the behavior of the QUECVT flag,
  which the gfs2 folks are waiting on."

* tag 'dlm-fixes-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm:
  dlm: fix QUECVT when convert queue is empty
Linus Torvalds 13 years ago
parent
commit
721b024bd4
1 changed files with 12 additions and 0 deletions
  1. 12 0
      fs/dlm/lock.c

+ 12 - 0
fs/dlm/lock.c

@@ -1736,6 +1736,18 @@ static int _can_be_granted(struct dlm_rsb *r, struct dlm_lkb *lkb, int now)
 	if (now && conv && !(lkb->lkb_exflags & DLM_LKF_QUECVT))
 		return 1;
 
+	/*
+	 * Even if the convert is compat with all granted locks,
+	 * QUECVT forces it behind other locks on the convert queue.
+	 */
+
+	if (now && conv && (lkb->lkb_exflags & DLM_LKF_QUECVT)) {
+		if (list_empty(&r->res_convertqueue))
+			return 1;
+		else
+			goto out;
+	}
+
 	/*
 	 * The NOORDER flag is set to avoid the standard vms rules on grant
 	 * order.