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Date: Mon, 25 Mar 2013 15:21:32 +0900 From: Minchan Kim <minchan@...nel.org> To: Andrew Morton <akpm@...ux-foundation.org> Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org, Mel Gorman <mgorman@...e.de>, Rik van Riel <riel@...hat.com>, Johannes Weiner <hannes@...xchg.org>, Hugh Dickins <hughd@...gle.com>, Sangseok Lee <sangseok.lee@....com>, Minchan Kim <minchan@...nel.org> Subject: [RFC 2/4] mm: make shrink_page_list with pages from multiple zones Now shrink_page_list expects all pages come from a same zone but it's too limited to use it. This patch removes the dependency so next patch can use shrink_page_list with pages from multiple zones. Signed-off-by: Minchan Kim <minchan@...nel.org> --- mm/vmscan.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index d3dc95f..9434ba2 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -705,7 +705,8 @@ static unsigned long shrink_page_list(struct list_head *page_list, goto keep; VM_BUG_ON(PageActive(page)); - VM_BUG_ON(page_zone(page) != zone); + if (zone) + VM_BUG_ON(page_zone(page) != zone); sc->nr_scanned++; @@ -951,7 +952,7 @@ keep: * back off and wait for congestion to clear because further reclaim * will encounter the same problem */ - if (nr_dirty && nr_dirty == nr_congested && global_reclaim(sc)) + if (nr_dirty && nr_dirty == nr_congested && global_reclaim(sc) && zone) zone_set_flag(zone, ZONE_CONGESTED); free_hot_cold_page_list(&free_pages, 1); -- 1.8.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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