ceph/ceph — pull request #1623 by ukernel (2014-04-08 08:29:24+00:00)
Title: mds: fix shared_ptr MDRequest bugs

The main change is use shared_ptr instead of weak_ptr to define
active request map. The reason is that slave request needs to be
preserved until master explicitly finish it.

Fixes: #8026
Signed-off-by: Yan, Zheng