From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756592AbcDLK3z (ORCPT ); Tue, 12 Apr 2016 06:29:55 -0400 Received: from outbound-smtp09.blacknight.com ([46.22.139.14]:38938 "EHLO outbound-smtp09.blacknight.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932223AbcDLK0c (ORCPT ); Tue, 12 Apr 2016 06:26:32 -0400 From: Mel Gorman To: Andrew Morton , Linux-MM Cc: Rik van Riel , Vlastimil Babka , Johannes Weiner , LKML , Mel Gorman Subject: [PATCH 01/28] mm, page_alloc: Use ac->classzone_idx instead of zone_idx(preferred_zone) Date: Tue, 12 Apr 2016 11:25:56 +0100 Message-Id: <1460456783-30996-2-git-send-email-mgorman@techsingularity.net> X-Mailer: git-send-email 2.6.4 In-Reply-To: <1460456783-30996-1-git-send-email-mgorman@techsingularity.net> References: <1460456783-30996-1-git-send-email-mgorman@techsingularity.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org ac->classzone_idx is determined by the index of the preferred zone and cached to avoid repeated calculations. wake_all_kswapds() should use it instead of using zone_idx() within a loop. Signed-off-by: Mel Gorman Acked-by: Johannes Weiner Acked-by: Vlastimil Babka --- mm/page_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 4d4079309760..e551f697bc68 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3139,7 +3139,7 @@ static void wake_all_kswapds(unsigned int order, const struct alloc_context *ac) for_each_zone_zonelist_nodemask(zone, z, ac->zonelist, ac->high_zoneidx, ac->nodemask) - wakeup_kswapd(zone, order, zonelist_zone_idx(ac->preferred_zoneref)); + wakeup_kswapd(zone, order, ac->classzone_idx); } static inline unsigned int -- 2.6.4