From ef550f6f4f6c9345a27ec85d98f4f7de1adce79c Mon Sep 17 00:00:00 2001 From: Sage Weil Date: Fri, 25 Mar 2011 13:27:48 -0700 Subject: ceph: flush msgr_wq during mds_client shutdown The release method for mds connections uses a backpointer to the mds_client, so we need to flush the workqueue of any pending work (and ceph_connection references) prior to freeing the mds_client. This fixes an oops easily triggered under UML by while true ; do mount ... ; umount ... ; done Also fix an outdated comment: the flush in ceph_destroy_client only flushes OSD connections out. This bug is basically an artifact of the ceph -> ceph+libceph conversion. Signed-off-by: Sage Weil --- fs/ceph/mds_client.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'fs') diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index a1ee8fa3a8e7..f60b07b0feb0 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -3215,9 +3215,15 @@ void ceph_mdsc_destroy(struct ceph_fs_client *fsc) { struct ceph_mds_client *mdsc = fsc->mdsc; + dout("mdsc_destroy %p\n", mdsc); ceph_mdsc_stop(mdsc); + + /* flush out any connection work with references to us */ + ceph_msgr_flush(); + fsc->mdsc = NULL; kfree(mdsc); + dout("mdsc_destroy %p done\n", mdsc); } -- cgit v1.2.3