From: Jim Schutt <jaschut@sandia.gov>
Date: Fri, 16 Sep 2011 14:27:31 +0000 (-0600)
Subject: libceph: initialize ack_stamp to avoid unnecessary connection reset
X-Git-Tag: v3.1-rc9~15^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c0d5f9db1c7d1b8a9e2f217706e8ea233bac2754;p=pandora-kernel.git

libceph: initialize ack_stamp to avoid unnecessary connection reset

Commit 4cf9d544631c recorded when an outgoing ceph message was ACKed,
in order to avoid unnecessary connection resets when an OSD is busy.

However, ack_stamp is uninitialized, so there is a window between
when the message is sent and when it is ACKed in which handle_timeout()
interprets the unitialized value as an expired timeout, and resets
the connection unnecessarily.

Close the window by initializing ack_stamp.

Signed-off-by: Jim Schutt <jaschut@sandia.gov>
Signed-off-by: Sage Weil <sage@newdream.net>
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