[Bugs] [Bug 1361678] thread CPU saturation limiting throughput on write workloads

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1361678



--- Comment #5 from Vijay Bellur <vbellur at redhat.com> ---
COMMIT: http://review.gluster.org/15070 committed in master by Pranith Kumar
Karampuri (pkarampu at redhat.com) 
------
commit 67ebde53ea26065d41cacf054fa4337c22de5903
Author: Pranith Kumar K <pkarampu at redhat.com>
Date:   Tue Aug 2 15:19:00 2016 +0530

    cluster/afr: copy loc before passing to syncop

    Problem:
    When io-threads is enabled on the client side, io-threads destroys the
    call-stub in which the loc is stored as soon as the c-stack unwinds.
    Because afr is creating a syncop with the address of loc passed in
    setxattr by the time syncop tries to access it, io-threads would have
    already freed the call-stub. This will lead to crash.

    Fix:
    Copy loc to frame->local and use it's address.

    BUG: 1361678
    Change-Id: I16987e491e24b0b4e3d868a6968e802e47c77f7a
    Signed-off-by: Pranith Kumar K <pkarampu at redhat.com>
    Reviewed-on: http://review.gluster.org/15070
    Reviewed-by: Ravishankar N <ravishankar at redhat.com>
    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>

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