Re: [RFC 4/4] mm: free reclaimed pages instantly without dependingnext reclaim

[Rik van Riel]

On 05/12/2013 10:10 PM, Minchan Kim wrote:
> Normally, file I/O for reclaiming is asynchronous so that
> when page writeback is completed, reclaimed page will be
> rotated into LRU tail for fast reclaiming in next turn.
> But it makes unnecessary CPU overhead and more iteration with higher
> priority of reclaim could reclaim too many pages than needed
> pages.
>
> This patch frees reclaimed pages by paging out instantly without
> rotating back them into LRU's tail when the I/O is completed so
> that we can get out of reclaim loop as soon as poosbile and avoid
> unnecessary CPU overhead for moving them.
>
> Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx>

I like this approach and am looking forward to your v2 series,
with the reworked patch 3/4.

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