dlm: use single thread workqueues

The recent commit to use cmwq for send and recv threads
a4341f2cb097d01bbdf01b212c887b93ab714936 introduced problems,
apparently due to multiple workqueue threads.  Single threads
make the problems go away, so return to that until we fully
understand the concurrency issues with multiple threads.

Signed-off-by: David Teigland <teigland@redhat.com>

diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 9c64ae9e4c1a9f6545552504e0b1184fc646a1ea..2d8c87b951c2539ee31114f54caa131abbd1d9b7 100644 (file)
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -1468,15 +1468,13 @@ static void work_stop(void)
 
 static int work_start(void)
 {
-       recv_workqueue = alloc_workqueue("dlm_recv", WQ_MEM_RECLAIM |
-                                        WQ_HIGHPRI | WQ_FREEZEABLE, 0);
+       recv_workqueue = create_singlethread_workqueue("dlm_recv");
        if (!recv_workqueue) {
                log_print("can't start dlm_recv");
                return -ENOMEM;
        }
 
-       send_workqueue = alloc_workqueue("dlm_send", WQ_MEM_RECLAIM |
-                                        WQ_HIGHPRI | WQ_FREEZEABLE, 0);
+       send_workqueue = create_singlethread_workqueue("dlm_send");
        if (!send_workqueue) {
                log_print("can't start dlm_send");
                destroy_workqueue(recv_workqueue);