tree dafd71f3e7fe46ed685b5ab3fd62c2bb7d3cb679
parent 59c2be1e4d42c0d4949cecdeef3f37070a1fbc13
author Sage Weil <sage@newdream.net> 1301084868 -0700
committer Sage Weil <sage@newdream.net> 1301084868 -0700

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Also fix an outdated comment: the flush in ceph_destroy_client only flushes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 <sage@newdream.net>