From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail143.messagelabs.com (mail143.messagelabs.com [216.82.254.35]) by kanga.kvack.org (Postfix) with ESMTP id F26108D0039 for ; Thu, 10 Feb 2011 06:46:55 -0500 (EST) Received: by pvc30 with SMTP id 30so254786pvc.14 for ; Thu, 10 Feb 2011 03:46:53 -0800 (PST) From: Namhyung Kim Subject: [RFC PATCH] mm: handle simple case in free_pcppages_bulk() Date: Thu, 10 Feb 2011 20:46:48 +0900 Message-Id: <1297338408-3590-1-git-send-email-namhyung@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: Mel Gorman , linux-mm@kvack.org, linux-kernel@vger.kernel.org Now I'm seeing that there are some cases to free all pages in a pcp lists. In that case, just frees all pages in the lists instead of being bothered with round-robin lists traversal. Signed-off-by: Namhyung Kim --- mm/page_alloc.c | 22 ++++++++++++++++++++++ 1 files changed, 22 insertions(+), 0 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index e8b02771ccea..959c54450ddf 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -596,6 +596,28 @@ static void free_pcppages_bulk(struct zone *zone, int count, zone->all_unreclaimable = 0; zone->pages_scanned = 0; + /* Simple case: Free all */ + if (to_free == pcp->count) { + LIST_HEAD(freelist); + + for (; migratetype < MIGRATE_PCPTYPES; migratetype++) + if (!list_empty(&pcp->lists[migratetype])) + list_move(&pcp->lists[migratetype], &freelist); + + while (!list_empty(&freelist)) { + struct page *page; + + page = list_first_entry(&freelist, struct page, lru); + /* must delete as __free_one_page list manipulates */ + list_del(&page->lru); + /* MIGRATE_MOVABLE list may include MIGRATE_RESERVEs */ + __free_one_page(page, zone, 0, page_private(page)); + trace_mm_page_pcpu_drain(page, 0, page_private(page)); + to_free--; + } + VM_BUG_ON(to_free); + } + while (to_free) { struct page *page; struct list_head *list; -- 1.7.4 -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org