From f3c60c5918f26ea16761ddc8b12d8401a3db626b Mon Sep 17 00:00:00 2001 From: Sage Weil Date: Wed, 11 Aug 2010 14:51:23 -0700 Subject: ceph: fix multiple mds session shutdown The use of a completion when waiting for session shutdown during umount is inappropriate, given the complexity of the condition. For multiple MDS's, this resulted in the umount thread spinning, often preventing the session close message from being processed in some cases. Switch to a waitqueue and defined a condition helper. This cleans things up nicely. Signed-off-by: Sage Weil --- fs/ceph/mds_client.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'fs/ceph/mds_client.h') diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h index ab7e89f5e344..c98267ce6d2a 100644 --- a/fs/ceph/mds_client.h +++ b/fs/ceph/mds_client.h @@ -234,7 +234,8 @@ struct ceph_mds_client { struct mutex mutex; /* all nested structures */ struct ceph_mdsmap *mdsmap; - struct completion safe_umount_waiters, session_close_waiters; + struct completion safe_umount_waiters; + wait_queue_head_t session_close_wq; struct list_head waiting_for_map; struct ceph_mds_session **sessions; /* NULL for mds if no session */ -- cgit v1.2.3