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    SubjectRe: [patch 01/11] mm: memcg: fix compaction/migration failing due to memcg limits
    (2012/07/05 9:44), Johannes Weiner wrote:
    > Compaction (and page migration in general) can currently be hindered
    > through pages being owned by memory cgroups that are at their limits
    > and unreclaimable.
    > The reason is that the replacement page is being charged against the
    > limit while the page being replaced is also still charged. But this
    > seems unnecessary, given that only one of the two pages will still be
    > in use after migration finishes.
    > This patch changes the memcg migration sequence so that the
    > replacement page is not charged. Whatever page is still in use after
    > successful or failed migration gets to keep the charge of the page
    > that was going to be replaced.
    > Reported-by: David Rientjes <>
    > Signed-off-by: Johannes Weiner <>

    Acked-by: KAMEZAWA Hiroyuki <>

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      Last update: 2012-07-09 05:21    [W:0.024 / U:9.432 seconds]
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