From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754741AbaIHR5h (ORCPT ); Mon, 8 Sep 2014 13:57:37 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:46582 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753024AbaIHR5g (ORCPT ); Mon, 8 Sep 2014 13:57:36 -0400 Message-ID: <540DEDE7.4020300@oracle.com> Date: Mon, 08 Sep 2014 13:56:55 -0400 From: Sasha Levin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.0 MIME-Version: 1.0 To: Mel Gorman CC: Hugh Dickins , "linux-mm@kvack.org" , Andrew Morton , Dave Jones , LKML , "Kirill A. Shutemov" , Peter Zijlstra , Rik van Riel , Johannes Weiner , Cyrill Gorcunov Subject: Re: mm: BUG in unmap_page_range References: <53DD5F20.8010507@oracle.com> <20140805144439.GW10819@suse.de> <53E17F06.30401@oracle.com> <53E989FB.5000904@oracle.com> <53FD4D9F.6050500@oracle.com> <20140827152622.GC12424@suse.de> <540127AC.4040804@oracle.com> <54082B25.9090600@oracle.com> <20140908171853.GN17501@suse.de> In-Reply-To: <20140908171853.GN17501@suse.de> Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: 7bit X-Source-IP: acsinet22.oracle.com [141.146.126.238] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/08/2014 01:18 PM, Mel Gorman wrote: > A worse possibility is that somehow the lock is getting corrupted but > that's also a tough sell considering that the locks should be allocated > from a dedicated cache. I guess I could try breaking that to allocate > one page per lock so DEBUG_PAGEALLOC triggers but I'm not very > optimistic. I did see ptl corruption couple days ago: https://lkml.org/lkml/2014/9/4/599 Could this be related? Thanks, Sasha From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yh0-f42.google.com (mail-yh0-f42.google.com [209.85.213.42]) by kanga.kvack.org (Postfix) with ESMTP id 3B9206B0036 for ; Mon, 8 Sep 2014 13:57:32 -0400 (EDT) Received: by mail-yh0-f42.google.com with SMTP id z6so2579239yhz.1 for ; Mon, 08 Sep 2014 10:57:32 -0700 (PDT) Received: from aserp1040.oracle.com (aserp1040.oracle.com. [141.146.126.69]) by mx.google.com with ESMTPS id g35si8181503yhb.157.2014.09.08.10.57.31 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Mon, 08 Sep 2014 10:57:31 -0700 (PDT) Message-ID: <540DEDE7.4020300@oracle.com> Date: Mon, 08 Sep 2014 13:56:55 -0400 From: Sasha Levin MIME-Version: 1.0 Subject: Re: mm: BUG in unmap_page_range References: <53DD5F20.8010507@oracle.com> <20140805144439.GW10819@suse.de> <53E17F06.30401@oracle.com> <53E989FB.5000904@oracle.com> <53FD4D9F.6050500@oracle.com> <20140827152622.GC12424@suse.de> <540127AC.4040804@oracle.com> <54082B25.9090600@oracle.com> <20140908171853.GN17501@suse.de> In-Reply-To: <20140908171853.GN17501@suse.de> Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Mel Gorman Cc: Hugh Dickins , "linux-mm@kvack.org" , Andrew Morton , Dave Jones , LKML , "Kirill A. Shutemov" , Peter Zijlstra , Rik van Riel , Johannes Weiner , Cyrill Gorcunov On 09/08/2014 01:18 PM, Mel Gorman wrote: > A worse possibility is that somehow the lock is getting corrupted but > that's also a tough sell considering that the locks should be allocated > from a dedicated cache. I guess I could try breaking that to allocate > one page per lock so DEBUG_PAGEALLOC triggers but I'm not very > optimistic. I did see ptl corruption couple days ago: https://lkml.org/lkml/2014/9/4/599 Could this be related? Thanks, Sasha -- 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