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    SubjectRe: [patch 7/8] vmscan: memcg-aware unevictable page rescue scanner
    2011/6/3 Ying Han <>:
    > On Thu, Jun 2, 2011 at 6:27 AM, Hiroyuki Kamezawa
    > <> wrote:
    >> 2011/6/1 Johannes Weiner <>:
    >>> 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 <>
    >> 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...
    > Hmm. Are we suggesting to keep one un-evictable LRU list for all
    > memcgs? So we will have
    > exclusive lru only for file and anon. If so, we are not done to make
    > all the lru list being exclusive
    > which is critical later to improve the zone->lru_lock contention
    > across the memcgs
    considering lrulock, yes, maybe you're right.

    > Sorry If i misinterpret the suggestion here

    My concern is I don't know for what purpose this function is used ..


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