[Bugs] [Bug 1313312] Client self-heals block the FOP that triggered the heals

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1313312



--- Comment #3 from Vijay Bellur <vbellur at redhat.com> ---
COMMIT: http://review.gluster.org/13564 committed in release-3.7 by Pranith
Kumar Karampuri (pkarampu at redhat.com) 
------
commit 4a5d8f65b9b04385dcae8b16a650f4e8ed357f8b
Author: Ravishankar N <ravishankar at redhat.com>
Date:   Tue Mar 22 14:26:32 2016 +0530

    afr: Add throttled background client-side heals

    Backport of: http://review.gluster.org/13207

    If a heal is needed after inode refresh (lookup, read_txn), launch it in
    the background instead of blocking the fop (that triggered refresh)
    until the heal happens.

    afr_replies_interpret() is modified such that the heal is
    launched only if atleast one sink brick is up.

    Max. no of heals that can happen in parallel is configurable via the
    'background-self-heal-count' volume option. Any number greater than that
    is put in a wait queue whose length is configurable via
    'heal-wait-queue-leng' volume option. If the wait queue is also full,
    further heals will be ignored.

    Default values:  background-self-heal-count=8, heal-wait-queue-leng=128

    Change-Id: I9a134b2c29d66b70b7b1278811bd504963aabacc
    BUG: 1313312
    Signed-off-by: Ravishankar N <ravishankar at redhat.com>
    Reviewed-on: http://review.gluster.org/13564
    Smoke: Gluster Build System <jenkins at build.gluster.com>
    NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.com>
    Reviewed-by: Pranith Kumar Karampuri <pkarampu at redhat.com>

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