cluster/afr: Fix partial heals in 3-way replication

Problem:
When there are 2 sources and one sink and if two self-heal daemons
try to acquire locks at the same time, there is a chance that it
gets a lock on one source and sink leading partial to heal. This will
need one more heal from the remaining source to sink for the complete
self-heal. This is not optimal.

Fix:
Upgrade non-blocking locks to blocking lock on all the subvolumes, if
the number of locks acquired is majority and there were eagains.

 >BUG: 1318751
 >Change-Id: Iae10b8d3402756c4164b98cc49876056ff7a61e5
 >Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
 >Reviewed-on: http://review.gluster.org/13766
 >Smoke: Gluster Build System <jenkins@build.gluster.com>
 >NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
 >CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
 >Reviewed-by: Ravishankar N <ravishankar@redhat.com>
 >(cherry picked from commit 8deedef565df49def75083678f8d1558c7b1f7d3)

Change-Id: Ia164360dc1474a717f63633f5deb2c39cc15017c
BUG: 1327863
Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Reviewed-on: http://review.gluster.org/14008
Smoke: Gluster Build System <jenkins@build.gluster.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>

0 files changed, 0 insertions, 0 deletions