osd: fix replies to dup/already-committed requests
osd: fix replies to dup/already-committed requests

We can safely reply if oldv is _older_ than what's on disk.  Otherwise the
request ends up on the list and never gets removed again.

Signed-off-by: Sage Weil <6dd34506bbd5e58221bbb3e4732d97c91f02277b@newdream.net>

ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph