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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<>
> Cc: Mel Gorman<>
> Cc: Rik van Riel<>
> Cc: Andrea Arcangeli<>
> Cc: Johannes Weiner<>
> Cc: KAMEZAWA Hiroyuki<>
> Signed-off-by: Minchan Kim<>

Acked-by: Rik van Riel <>

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