From: Sage Weil <sage@newdream.net>
Date: Fri, 4 Mar 2011 20:25:05 +0000 (-0800)
Subject: libceph: fix msgr standby handling
X-Git-Tag: v2.6.38-rc8~9^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e00de341fdb76c955703b4438100f9933c452b7f;p=pandora-kernel.git

libceph: fix msgr standby handling

The standby logic used to be pretty dependent on the work requeueing
behavior that changed when we switched to WQ_NON_REENTRANT.  It was also
very fragile.

Restructure things so that:
 - We clear WRITE_PENDING when we set STANDBY.  This ensures we will
   requeue work when we wake up later.
 - con_work backs off if STANDBY is set.  There is nothing to do if we are
   in standby.
 - clear_standby() helper is called by both con_send() and con_keepalive(),
   the two actions that can wake us up again.  Move the connect_seq++
   logic here.

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