Messages in this thread | | | From | KOSAKI Motohiro <> | Subject | Re: [PATCH -mmotm-2009-12-10-17-19] Prevent churning of zero page in LRU list. | Date | Mon, 28 Dec 2009 12:18:38 +0900 (JST) |
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> > VM doesn't add zero page to LRU list. > It means zero page's churning in LRU list is pointless. > > As a matter of fact, zero page can't be promoted by mark_page_accessed > since it doesn't have PG_lru. > > This patch prevent unecessary mark_page_accessed call of zero page > alghouth caller want FOLL_TOUCH. > > Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
Looks good to me. Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
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