Messages in this thread Patch in this message | | | Date | Thu, 11 Jun 2009 17:38:19 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | [PATCH 2/3] check unevictable flag in lumy reclaim v2 |
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How about this ?
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Lumpy reclaim check pages from their pfn. Then, it can find unevictable pages in its loop. Abort lumpy reclaim when we find Unevictable page, we never get a lump of pages for requested order.
Changelog: v1->v2 - rewrote commet.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> --- mm/vmscan.c | 9 +++++++++ 1 file changed, 9 insertions(+)
Index: lumpy-reclaim-trial/mm/vmscan.c =================================================================== --- lumpy-reclaim-trial.orig/mm/vmscan.c +++ lumpy-reclaim-trial/mm/vmscan.c @@ -936,6 +936,15 @@ static unsigned long isolate_lru_pages(u /* Check that we have not crossed a zone boundary. */ if (unlikely(page_zone_id(cursor_page) != zone_id)) continue; + /* + * We tries to free all pages in this range to create + * a free large page. Then, if the range includes a page + * never be reclaimed, we have no reason to do more. + * PageUnevictable page is not a page which can be + * easily freed. Abort this scan now. + */ + if (unlikely(PageUnevictable(cursor_page))) + break; if (__isolate_lru_page(cursor_page, mode, file) == 0) { list_move(&cursor_page->lru, dst); nr_taken++;
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