cluster/afr: Wake up post-op on non-co-operative transaction

Problem:
The problem is observed when kernel untar is done. One file untar
happens every second. The reason for this is, setattr lock is blocked
on the prev fd data-transaction full-lock (because of eager-lock).
Because of post-op-delay the post-op (xattrop + unlock) of the prev
data-transaction happens after 1 sec.
Until this the setattr is blocked resulting in performance problems
in untar.

Fix:
Whenever an loc data, meta-data transaction comes, it should wakeup
the prev-post-op on the same process' fd.

Tests:
The performance problem in untar went away. I put a breakpoint in
client_finodelk for a 2G file dd and the inodelk is hit only 4 times.
This confirms that the change does not affect post-op-delay in a
-ve way.

Change-Id: Ice3c2a1211f4dca6520a19bc4ba6cb9efb2902ad
BUG: 845754
Signed-off-by: Pranith Kumar K <pranithk@gluster.com>
Reviewed-on: http://review.gluster.org/3975
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
Reviewed-by: Anand Avati <avati@redhat.com>

0 files changed, 0 insertions, 0 deletions