[Bugs] [Bug 1309462] Upgrade from 3.7.6 to 3.7.8 causes massive drop in write performance. Fresh install of 3.7.8 also has low write performance

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1309462



--- Comment #34 from Vijay Bellur <vbellur at redhat.com> ---
COMMIT: http://review.gluster.org/13540 committed in master by Raghavendra G
(rgowdapp at redhat.com) 
------
commit 5b5f03d2665687ab717f123da1266bcd3a83da0f
Author: Poornima G <pgurusid at redhat.com>
Date:   Fri Feb 26 06:42:14 2016 -0500

    fuse: Add a new mount option capability

    Originally all security.* xattrs were forbidden if selinux is disabled,
    which was causing Samba's acl_xattr module to not work, as it would
    store the NTACL in security.NTACL. To fix this
http://review.gluster.org/#/c/12826/
    was sent, which forbid only security.selinux. This opened up a getxattr
    call on security.capability before every write fop and others.

    Capabilities can be used without selinux, hence if selinux is disabled,
    security.capability cannot be forbidden. Hence adding a new mount
    option called capability.

    Only when "--capability" or "--selinux" mount option is used,
    security.capability is sent to the brick, else it is forbidden.

    Change-Id: I77f60e0fb541deaa416159e45c78dd2ae653105e
    BUG: 1309462
    Signed-off-by: Poornima G <pgurusid at redhat.com>
    Reviewed-on: http://review.gluster.org/13540
    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: Raghavendra G <rgowdapp at redhat.com>

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