From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1423091AbbD2Nlg (ORCPT ); Wed, 29 Apr 2015 09:41:36 -0400 Received: from cantor2.suse.de ([195.135.220.15]:32960 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1422967AbbD2Nlf (ORCPT ); Wed, 29 Apr 2015 09:41:35 -0400 Date: Wed, 29 Apr 2015 14:41:31 +0100 From: Mel Gorman To: Fengguang Wu Cc: LKP , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [mm/meminit] PANIC: early exception 06 rip 10:ffffffff811bfa9a error 0 cr2 ffff88000fbff000 Message-ID: <20150429134131.GR2449@suse.de> References: <20150429132817.GA10479@wfg-t540p.sh.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <20150429132817.GA10479@wfg-t540p.sh.intel.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 29, 2015 at 09:28:17PM +0800, Fengguang Wu wrote: > Greetings, > > 0day kernel testing robot got the below dmesg and the first bad commit is > > git://git.kernel.org/pub/scm/linux/kernel/git/mel/linux-balancenuma mm-deferred-meminit-v6r1 > > commit 285c36ab5b3e59865a0f4d79f4c1758455e684f7 > Author: Mel Gorman > AuthorDate: Mon Sep 29 14:54:01 2014 +0100 > Commit: Mel Gorman > CommitDate: Wed Apr 22 19:48:15 2015 +0100 > > mm: meminit: Reduce number of times pageblocks are set during struct page init > > During parallel sturct page initialisation, ranges are checked for every > PFN unnecessarily which increases boot times. This patch alters when the > ranges are checked. > > Signed-off-by: Mel Gorman > The series is old but I think it's still relevant. Can you try this please? diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 9c8f2a72263d..19543f708642 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4489,8 +4489,8 @@ void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone, if (!(pfn & (pageblock_nr_pages - 1))) { struct page *page = pfn_to_page(pfn); - set_pageblock_migratetype(page, MIGRATE_MOVABLE); __init_single_page(page, pfn, zone, nid); + set_pageblock_migratetype(page, MIGRATE_MOVABLE); } else { __init_single_pfn(pfn, zone, nid); }