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    SubjectRe: [patch 3/4] memcg: break out event counters from other stats
    On Sun,  7 Nov 2010 23:14:38 +0100
    Johannes Weiner <hannes@cmpxchg.org> wrote:

    > For increasing and decreasing per-cpu cgroup usage counters it makes
    > sense to use signed types, as single per-cpu values might go negative
    > during updates. But this is not the case for only-ever-increasing
    > event counters.
    >
    > All the counters have been signed 64-bit so far, which was enough to
    > count events even with the sign bit wasted.
    >
    > The next patch narrows the usage counters type (on 32-bit CPUs, that
    > is), though, so break out the event counters and make them unsigned
    > words as they should have been from the start.
    >
    > Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>

    Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>



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