From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx130.postini.com [74.125.245.130]) by kanga.kvack.org (Postfix) with SMTP id 023E96B0034 for ; Tue, 16 Jul 2013 09:42:02 -0400 (EDT) From: Andrea Arcangeli Subject: [PATCH 06/10] mm: zone_reclaim: compaction: increase the high order pages in the watermarks Date: Tue, 16 Jul 2013 15:41:50 +0200 Message-Id: <1373982114-19774-7-git-send-email-aarcange@redhat.com> In-Reply-To: <1373982114-19774-1-git-send-email-aarcange@redhat.com> References: <1373982114-19774-1-git-send-email-aarcange@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: Mel Gorman , Rik van Riel , Hugh Dickins , Richard Davies , Shaohua Li , Rafael Aquini , Hush Bensen Prevent the scaling down to reduce the watermarks too much. Signed-off-by: Andrea Arcangeli --- mm/page_alloc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index d94503d..f5ea1147 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1665,7 +1665,8 @@ static bool __zone_watermark_ok(struct zone *z, int order, unsigned long mark, free_pages -= z->free_area[o].nr_free << o; /* Require fewer higher order pages to be free */ - min >>= 1; + if (o < (pageblock_order >> 2)) + min >>= 1; if (free_pages <= min) return false; -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org