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    SubjectRe: [PATCH v2 04/10] Add additional isolation mode
    On 05/29/2011 02:13 PM, Minchan Kim wrote:
    > There are some places to isolate lru page and I believe
    > users of isolate_lru_page will be growing.
    > The purpose of them is each different so part of isolated pages
    > should put back to LRU, again.
    >
    > The problem is when we put back the page into LRU,
    > we lose LRU ordering and the page is inserted at head of LRU list.
    > It makes unnecessary LRU churning so that vm can evict working set pages
    > rather than idle pages.
    >
    > This patch adds new modes when we isolate page in LRU so we don't isolate pages
    > if we can't handle it. It could reduce LRU churning.
    >
    > This patch doesn't change old behavior. It's just used by next patches.
    >
    > Cc: KOSAKI Motohiro<kosaki.motohiro@jp.fujitsu.com>
    > Cc: Mel Gorman<mgorman@suse.de>
    > Cc: Rik van Riel<riel@redhat.com>
    > Cc: Andrea Arcangeli<aarcange@redhat.com>
    > Cc: Johannes Weiner<hannes@cmpxchg.org>
    > Cc: KAMEZAWA Hiroyuki<kamezawa.hiroyu@jp.fujitsu.com>
    > Signed-off-by: Minchan Kim<minchan.kim@gmail.com>

    Acked-by: Rik van Riel <riel@redhat.com>


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