From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f71.google.com (mail-wm0-f71.google.com [74.125.82.71]) by kanga.kvack.org (Postfix) with ESMTP id 622846B0005 for ; Thu, 19 May 2016 08:11:57 -0400 (EDT) Received: by mail-wm0-f71.google.com with SMTP id s63so48910315wme.2 for ; Thu, 19 May 2016 05:11:57 -0700 (PDT) Received: from mx2.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id l8si17393931wjv.161.2016.05.19.05.11.56 for (version=TLS1 cipher=AES128-SHA bits=128/128); Thu, 19 May 2016 05:11:56 -0700 (PDT) Subject: Re: [PATCH] mm: compact: fix zoneindex in compact References: <1463659121-84124-1-git-send-email-puck.chen@hisilicon.com> From: Vlastimil Babka Message-ID: <573DAD84.7020403@suse.cz> Date: Thu, 19 May 2016 14:11:48 +0200 MIME-Version: 1.0 In-Reply-To: <1463659121-84124-1-git-send-email-puck.chen@hisilicon.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Chen Feng , mhocko@suse.com, kirill.shutemov@linux.intel.com, hannes@cmpxchg.org, tj@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrew Morton Cc: suzhuangluan@hisilicon.com, dan.zhao@hisilicon.com, qijiwen@hisilicon.com, xuyiping@hisilicon.com, oliver.fu@hisilicon.com, puck.chen@foxmail.com On 05/19/2016 01:58 PM, Chen Feng wrote: > While testing the kcompactd in my platform 3G MEM only DMA ZONE. > I found the kcompactd never wakeup. It seems the zoneindex > has already minus 1 before. So the traverse here should be <=. Ouch, thanks! > Signed-off-by: Chen Feng Fixes: 0f87baf4f7fb ("mm: wake kcompactd before kswapd's short sleep") Cc: stable@vger.kernel.org Acked-by: Vlastimil Babka > --- > mm/compaction.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/mm/compaction.c b/mm/compaction.c > index 8fa2540..e5122d9 100644 > --- a/mm/compaction.c > +++ b/mm/compaction.c > @@ -1742,7 +1742,7 @@ static bool kcompactd_node_suitable(pg_data_t *pgdat) > struct zone *zone; > enum zone_type classzone_idx = pgdat->kcompactd_classzone_idx; > > - for (zoneid = 0; zoneid < classzone_idx; zoneid++) { > + for (zoneid = 0; zoneid <= classzone_idx; zoneid++) { > zone = &pgdat->node_zones[zoneid]; > > if (!populated_zone(zone)) > -- 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