Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935428Ab3DILSQ (ORCPT ); Tue, 9 Apr 2013 07:18:16 -0400 Received: from cantor2.suse.de ([195.135.220.15]:50338 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935193Ab3DILSL (ORCPT ); Tue, 9 Apr 2013 07:18:11 -0400 From: Mel Gorman To: Andrew Morton Cc: Jiri Slaby , Valdis Kletnieks , Rik van Riel , Zlatko Calusic , Johannes Weiner , dormando , Satoru Moriya , Michal Hocko , Linux-MM , LKML , Mel Gorman Subject: [PATCH 09/10] mm: vmscan: Check if kswapd should writepage once per pgdat scan Date: Tue, 9 Apr 2013 12:07:04 +0100 Message-Id: <1365505625-9460-10-git-send-email-mgorman@suse.de> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1365505625-9460-1-git-send-email-mgorman@suse.de> References: <1365505625-9460-1-git-send-email-mgorman@suse.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1640 Lines: 52 Currently kswapd checks if it should start writepage as it shrinks each zone without taking into consideration if the zone is balanced or not. This is not wrong as such but it does not make much sense either. This patch checks once per pgdat scan if kswapd should be writing pages. Signed-off-by: Mel Gorman Reviewed-by: Michal Hocko Acked-by: Rik van Riel --- mm/vmscan.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index c929d1e..6cd6435 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -2836,6 +2836,13 @@ static unsigned long balance_pgdat(pg_data_t *pgdat, int order, } /* + * If we're getting trouble reclaiming, start doing writepage + * even in laptop mode. + */ + if (sc.priority < DEF_PRIORITY - 2) + sc.may_writepage = 1; + + /* * Now scan the zone in the dma->highmem direction, stopping * at the last zone which needs scanning. * @@ -2907,13 +2914,6 @@ static unsigned long balance_pgdat(pg_data_t *pgdat, int order, raise_priority = false; } - /* - * If we're getting trouble reclaiming, start doing - * writepage even in laptop mode. - */ - if (sc.priority < DEF_PRIORITY - 2) - sc.may_writepage = 1; - if (zone->all_unreclaimable) { if (end_zone && end_zone == i) end_zone--; -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/