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Subject[PATCH 3.10 123/123] libceph: ceph-msgr workqueue needs a resque worker
Date
3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ilya Dryomov <idryomov@redhat.com>

commit f9865f06f7f18c6661c88d0511f05c48612319cc upstream.

Commit f363e45fd118 ("net/ceph: make ceph_msgr_wq non-reentrant")
effectively removed WQ_MEM_RECLAIM flag from ceph_msgr_wq. This is
wrong - libceph is very much a memory reclaim path, so restore it.

Signed-off-by: Ilya Dryomov <idryomov@redhat.com>
Tested-by: Micha Krause <micha@krausam.de>
Reviewed-by: Sage Weil <sage@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
net/ceph/messenger.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -290,7 +290,8 @@ int ceph_msgr_init(void)
if (ceph_msgr_slab_init())
return -ENOMEM;

- ceph_msgr_wq = alloc_workqueue("ceph-msgr", WQ_NON_REENTRANT, 0);
+ ceph_msgr_wq = alloc_workqueue("ceph-msgr",
+ WQ_NON_REENTRANT | WQ_MEM_RECLAIM, 0);
if (ceph_msgr_wq)
return 0;




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