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    SubjectRe: [patch 7/8] vmscan: memcg-aware unevictable page rescue scanner
    On Thu, Jun 02, 2011 at 10:27:15PM +0900, Hiroyuki Kamezawa wrote:
    > 2011/6/1 Johannes Weiner <hannes@cmpxchg.org>:
    > > Once the per-memcg lru lists are exclusive, the unevictable page
    > > rescue scanner can no longer work on the global zone lru lists.
    > >
    > > This converts it to go through all memcgs and scan their respective
    > > unevictable lists instead.
    > >
    > > Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
    >
    > Hm, isn't it better to have only one GLOBAL LRU for unevictable pages ?
    > memcg only needs counter for unevictable pages and LRU is not necessary
    > to be per memcg because we don't reclaim it...

    That's true, and I will look into it. But keep in mind that it needs
    special-casing that one list type from all the others, so maybe it's
    just easier to keep it like this.



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