[Bugs] [Bug 1211863] RFE: Support in md-cache to use upcall notifications to invalidate its cache

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1211863



--- Comment #92 from Worker Ant <bugzilla-bot at gluster.org> ---
COMMIT: http://review.gluster.org/15185 committed in master by Raghavendra G
(rgowdapp at redhat.com) 
------
commit 3cc7f6588c281846f8c590553da03dd16f150e8a
Author: Poornima G <pgurusid at redhat.com>
Date:   Wed Aug 17 12:55:37 2016 +0530

    md-cache: Add cache hit and miss counters

    These counters can be accessed either by .meta interface
    or statedump.

    From meta: cat on the private file in md-cache directory.
    Eg: cat /mnt/glusterfs/0/.meta/graphs/active/patchy-md-cache/private
    [performance/md-cache.patchy-md-cache]
    stat_hit_count = 2
    stat_miss_count = 8
    xattr_hit_count = 4
    xattr_miss_count = 3
    nameless_lookup_count = 1
    negative_lookup_count = 0
    stat_invalidations_recieved = 1
    xattr_invalidations_recieved = 1

    Change-Id: Ib62a8822f263a9f75858b15832d0119fbe382629
    BUG: 1211863
    Signed-off-by: Poornima G <pgurusid at redhat.com>
    Reviewed-on: http://review.gluster.org/15185
    Smoke: Gluster Build System <jenkins at build.gluster.org>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.org>
    NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    Reviewed-by: Raghavendra G <rgowdapp at redhat.com>

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