[Bugs] [Bug 1408772] [Arbiter] After Killing a brick writes drastically slow down

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1408772



--- Comment #2 from Worker Ant <bugzilla-bot at gluster.org> ---
COMMIT: http://review.gluster.org/16291 committed in release-3.8 by Pranith
Kumar Karampuri (pkarampu at redhat.com) 
------
commit 034ee769a55099c343b00cdc39896fe74e44068d
Author: Ravishankar N <ravishankar at redhat.com>
Date:   Fri Dec 23 07:11:13 2016 +0000

    afr: use accused matrix instead of readable matrix for deciding heals

    Problem:
    afr_replies_interpret() used the 'readable' matrix to trigger client
    side heals after inode refresh. But for arbiter, readable is always
    zero. So when `dd` is run with a data brick down, spurious data heals
    are are triggered. These heals open an fd, causing eager lock to be
    disabled (open fd count >1) in afr transactions, leading to extra FXATTROPS

    Fix:
    Use the accused matrix (derived from interpreting the afr pending
    xattrs) to decide whether we can start heal or not.

    > Reviewed-on: http://review.gluster.org/16277
    > NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    > CentOS-regression: Gluster Build System <jenkins at build.gluster.org>
    > Smoke: Gluster Build System <jenkins at build.gluster.org>
    > Reviewed-by: Pranith Kumar Karampuri <pkarampu at redhat.com>
    > Tested-by: Pranith Kumar Karampuri <pkarampu at redhat.com>
    (cherry picked from commit 5a7c86e578f5bbd793126a035c30e6b052177a9f)

    Change-Id: Ibbd56c9aed6026de6ec42422e60293702aaf55f9
    BUG: 1408772
    Signed-off-by: Ravishankar N <ravishankar at redhat.com>
    Reviewed-on: http://review.gluster.org/16291
    Smoke: Gluster Build System <jenkins at build.gluster.org>
    NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.org>
    Reviewed-by: Pranith Kumar Karampuri <pkarampu at redhat.com>

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