[Bugs] [Bug 1347524] NFS+attach tier:IOs hang while attach tier is issued

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1347524



--- Comment #2 from Vijay Bellur <vbellur at redhat.com> ---
COMMIT: http://review.gluster.org/14750 committed in release-3.8 by Raghavendra
G (rgowdapp at redhat.com) 
------
commit 6106aec748e8f1c328dda30cbbb5bdfa91c0a869
Author: Mohammed Rafi KC <rkavunga at redhat.com>
Date:   Tue May 3 14:43:20 2016 +0530

    dht:remember locked subvol and send unlock to the same

    During locking we send lock request to cached subvol,
    and normally we unlock to the cached subvol
    But with parallel fresh lookup on a directory, there
    is a race window where the cached subvol can change
    and the unlock can go into a different subvol from
    which we took lock.

    This will result in a stale lock held on one of the
    subvol.

    So we will store the details of subvol which we took the lock
    and will unlock from the same subvol

    Back port of>
    >Change-Id: I47df99491671b10624eb37d1d17e40bacf0b15eb
    >BUG: 1311002
    >Signed-off-by: Mohammed Rafi KC <rkavunga at redhat.com>
    >Reviewed-on: http://review.gluster.org/13492
    >Reviewed-by: N Balachandran <nbalacha at redhat.com>
    >Smoke: Gluster Build System <jenkins at build.gluster.com>
    >NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    >Reviewed-by: Raghavendra G <rgowdapp at redhat.com>
    >CentOS-regression: Gluster Build System <jenkins at build.gluster.com>

    (cherry picked from commit ef0db52bc55a51fe5e3856235aed0230b6a188fe)

    Change-Id: Ib821e7355b4937b86d2f9f11e2c8311b7301b6c7
    BUG: 1347524
    Signed-off-by: Mohammed Rafi KC <rkavunga at redhat.com>
    Reviewed-on: http://review.gluster.org/14750
    Smoke: Gluster Build System <jenkins at build.gluster.org>
    NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    Reviewed-by: N Balachandran <nbalacha at redhat.com>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.org>
    Reviewed-by: Raghavendra G <rgowdapp at redhat.com>

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