posix: Implement a janitor thread to close fd

Problem: In the commit fb20713b380e1df8d7f9e9df96563be2f9144fd6 we use
         syntask to close fd but we have found the patch is reducing the
         performance

Solution: Use janitor thread to close fd's and save the pfd ctx into
          ctx janitor list and also save the posix_xlator into pfd object to
          avoid the race condition during cleanup in brick_mux environment

Change-Id: Ifb3d18a854b267333a3a9e39845bfefb83fbc092
Fixes: #1396
Signed-off-by: Mohit Agrawal <moagrawa@redhat.com>

0 files changed, 0 insertions, 0 deletions