From: Ilya Dryomov <[email protected]>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
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.
Cc: [email protected] # needs backporting for < 3.12
Signed-off-by: Ilya Dryomov <[email protected]>
Tested-by: Micha Krause <[email protected]>
Reviewed-by: Sage Weil <[email protected]>
Signed-off-by: Jiri Slaby <[email protected]>
---
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 94e21b9b1c87..057017bd3b42 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;
--
2.1.2
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