[PATCH 3.13 095/105] libceph: ceph-msgr workqueue needs a resque worker

Kamal Mostafa
2014-10-27T19:21:00Z

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: Kamal Mostafa <kamal@canonical.com>
---
net/ceph/messenger.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index 94e21b9..057017b 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -290,7 +290,11 @@ int ceph_msgr_init(void)
if (ceph_msgr_slab_init())
return -ENOMEM;

- ceph_msgr_wq = alloc_workqueue("ceph-msgr", 0, 0);
+ /*
+ * The number of active work items is limited by the number of
+ * connections, so leave @max_active at default.
+ */
+ ceph_msgr_wq = alloc_workqueue("ceph-msgr", WQ_MEM_RECLAIM, 0);
if (ceph_msgr_wq)
return 0;

--
1.9.1