tree a32ab9e75285537407e5ec95d95056167af7fac4
parent c1e62b8fc355e0c3706f1ae0dacb72d1c514dc80
author Jeff Layton <jlayton@redhat.com> 1391447589 -0500
committer Jeff Layton <jlayton@redhat.com> 1396268683 -0400

locks: skip deadlock detection on FL_FILE_PVT locks

It's not really feasible to do deadlock detection with FL_FILE_PVT
locks since they aren't owned by a single task, per-se. Deadlock
detection also tends to be rather expensive so just skip it for
these sorts of locks.

Also, add a FIXME comment about adding more limited deadlock detection
that just applies to ro -> rw upgrades, per Andy's request.

Cc: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Jeff Layton <jlayton@redhat.com>