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Subject[GIT PULL] dlm fixes for 3.4
Hi Linus,

Please pull dlm fixes from tag:

git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm.git dlm-fixes-3.4

This includes one short patch fixing the behavior of
the QUECVT flag, which the gfs2 folks are waiting on.

Thanks,
Dave

From: David Teigland <teigland@redhat.com>
Date: Wed, 4 Apr 2012 09:49:15 -0500
Subject: [PATCH] dlm: fix QUECVT when convert queue is empty

The QUECVT flag should not prevent conversions from
being granted immediately when the convert queue is
empty.

Signed-off-by: David Teigland <teigland@redhat.com>
---
fs/dlm/lock.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index fa5c07d..4c58d4a 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -1737,6 +1737,18 @@ static int _can_be_granted(struct dlm_rsb *r, struct dlm_lkb *lkb, int now)
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.
*/
--
1.7.10.rc3


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