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    SubjectRe: [patch] mm: memcontrol: lockless page counters
    Hi Dave,

    this patch removes the lock you saw with will-it-scale/page_fault2
    entirely, is there a chance you could give it a spin? It's based on
    v3.17-rc4-mmots-2014-09-12-17-13-4 and that memcg THP fix. That
    kernel also includes the recent root-memcg revert, so you'd have to
    run it in a memcg; which is as easy as:

    mkdir /sys/fs/cgroup/memory/foo
    echo $$ >/sys/fs/cgroup/memory/foo/tasks
    perf record -g -a ./runtest.py page_fault2

    Thanks!


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