From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx157.postini.com [74.125.245.157]) by kanga.kvack.org (Postfix) with SMTP id 7D9766B0039 for ; Fri, 2 Aug 2013 12:06:45 -0400 (EDT) From: Andrea Arcangeli Subject: [PATCH 6/9] mm: zone_reclaim: compaction: increase the high order pages in the watermarks Date: Fri, 2 Aug 2013 18:06:33 +0200 Message-Id: <1375459596-30061-7-git-send-email-aarcange@redhat.com> In-Reply-To: <1375459596-30061-1-git-send-email-aarcange@redhat.com> References: <1375459596-30061-1-git-send-email-aarcange@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: Johannes Weiner , Mel Gorman , Rik van Riel , Hugh Dickins , Richard Davies , Shaohua Li , Rafael Aquini , Andrew Morton , 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 4401983..b32ecde 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