Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932517AbbLCHNI (ORCPT ); Thu, 3 Dec 2015 02:13:08 -0500 Received: from mail-pa0-f54.google.com ([209.85.220.54]:33126 "EHLO mail-pa0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755928AbbLCHLo (ORCPT ); Thu, 3 Dec 2015 02:11:44 -0500 From: Joonsoo Kim X-Google-Original-From: Joonsoo Kim To: Andrew Morton Cc: Vlastimil Babka , Mel Gorman , Rik van Riel , David Rientjes , Minchan Kim , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Joonsoo Kim Subject: [PATCH v3 3/7] mm/compaction: initialize compact_order_failed to MAX_ORDER Date: Thu, 3 Dec 2015 16:11:17 +0900 Message-Id: <1449126681-19647-4-git-send-email-iamjoonsoo.kim@lge.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1449126681-19647-1-git-send-email-iamjoonsoo.kim@lge.com> References: <1449126681-19647-1-git-send-email-iamjoonsoo.kim@lge.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1377 Lines: 36 If compact_order_failed is initialized to 0 and order-9 compaction is continually failed, defer counter will be updated to activate deferring. Although other defer counters will be properly updated, compact_order_failed will not be updated because failed order cannot be lower than compact_order_failed, 0. In this case, low order compaction such as 2, 3 could be deferred due to this wrongly initialized compact_order_failed value. This patch removes this possibility by initializing it to MAX_ORDER. Signed-off-by: Joonsoo Kim --- mm/page_alloc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index d0499ff..7002c66 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5273,6 +5273,9 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat) zone_seqlock_init(zone); zone->zone_pgdat = pgdat; zone_pcp_init(zone); +#ifdef CONFIG_COMPACTION + zone->compact_order_failed = MAX_ORDER; +#endif /* For bootup, initialized properly in watermark setup */ mod_zone_page_state(zone, NR_ALLOC_BATCH, zone->managed_pages); -- 1.9.1 -- 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/