locks: perform inode_ref of pl_update_refkeeper outside locked region

Performing inode_ref inside the critical section of pl_update_refkeeper
(around pl_inode_t->mutex) causes a deadlock with inode_table_t->lock.
The other thread (process state dump) holds the inode_table_t->lock first
to loop over inodes and then while dumping an inode's lock context, tries
to acquire pl_inode_t->mutex thereby completing the deadlock.

The fix is to perform inode_ref outside the critical section in
pl_update_refkeeper

Change-Id: I689ab4a9b46b36287740279fdec6159182c86119
BUG: 3753
Reviewed-on: http://review.gluster.com/629
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vijay@gluster.com>

0 files changed, 0 insertions, 0 deletions