From: Yehuda Sadeh <yehuda@hq.newdream.net>
Date: Fri, 26 Feb 2010 23:32:31 +0000 (-0800)
Subject: ceph: reset osd after relevant messages timed out
X-Git-Tag: v2.6.34-rc2~9^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=422d2cb8f9afadba1ecd3614f658b6daaaa480fb;p=pandora-kernel.git

ceph: reset osd after relevant messages timed out

This simplifies the process of timing out messages. We
keep lru of current messages that are in flight. If a
timeout has passed, we reset the osd connection, so that
messages will be retransmitted.  This is a failsafe in case
we hit some sort of problem sending out message to the OSD.
Normally, we'll get notification via an updated osdmap if
there are problems.

If a request is older than the keepalive timeout, send a
keepalive to ensure we detect any breaks in the TCP connection.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
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