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SubjectRe: [PATCH 3/10] mm/memcg: add zone pointer into lruvec
On Mon, 20 Feb 2012 15:30:45 -0800 (PST)
Hugh Dickins <> wrote:

> The lruvec is looking rather useful: if we just add a zone pointer
> into the lruvec, then we can pass the lruvec pointer around and save
> some superfluous arguments and recomputations in various places.
> Just occasionally we do want mem_cgroup_from_lruvec() to get back from
> lruvec to memcg; but then we can remove all uses of vmscan.c's private
> mem_cgroup_zone *mz, passing the lruvec pointer instead.
> And while we're there, get_scan_count() can call vmscan_swappiness()
> once, instead of twice in a row.
> Signed-off-by: Hugh Dickins <>
> ---

I like this cleanup

Acked-by: KAMEZAWA Hiroyuki <>

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