From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yh0-f46.google.com (mail-yh0-f46.google.com [209.85.213.46]) by kanga.kvack.org (Postfix) with ESMTP id B8F966B0035 for ; Tue, 11 Mar 2014 18:27:46 -0400 (EDT) Received: by mail-yh0-f46.google.com with SMTP id b6so6385063yha.33 for ; Tue, 11 Mar 2014 15:27:46 -0700 (PDT) Received: from userp1040.oracle.com (userp1040.oracle.com. [156.151.31.81]) by mx.google.com with ESMTPS id c1si38611897yhc.73.2014.03.11.15.20.49 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Tue, 11 Mar 2014 15:21:19 -0700 (PDT) Message-ID: <531F8C3A.1040502@oracle.com> Date: Tue, 11 Mar 2014 18:20:42 -0400 From: Sasha Levin MIME-Version: 1.0 Subject: Re: mm: mmap_sem lock assertion failure in __mlock_vma_pages_range References: <531F6689.60307@oracle.com> <1394568453.2786.28.camel@buesod1.americas.hpqcorp.net> <20140311133051.bf5ca716ef189746ebcff431@linux-foundation.org> <531F75D1.3060909@oracle.com> <1394570844.2786.42.camel@buesod1.americas.hpqcorp.net> <531F79F7.5090201@oracle.com> <1394574323.2786.45.camel@buesod1.americas.hpqcorp.net> In-Reply-To: <1394574323.2786.45.camel@buesod1.americas.hpqcorp.net> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Davidlohr Bueso Cc: Andrew Morton , "linux-mm@kvack.org" , Michel Lespinasse , Rik van Riel , Vlastimil Babka , LKML On 03/11/2014 05:45 PM, Davidlohr Bueso wrote: > On Tue, 2014-03-11 at 17:02 -0400, Sasha Levin wrote: >> >On 03/11/2014 04:47 PM, Davidlohr Bueso wrote: >>>> > >>Bingo! With the above patch: >>>>> > >> > >>>>> > >> >[ 243.565794] kernel BUG at mm/vmacache.c:76! >>>>> > >> >[ 243.566720] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC >>>>> > >> >[ 243.568048] Dumping ftrace buffer: >>>>> > >> >[ 243.568740] (ftrace buffer empty) >>>>> > >> >[ 243.569481] Modules linked in: >>>>> > >> >[ 243.570203] CPU: 10 PID: 10073 Comm: trinity-c332 Tainted: G W 3.14.0-rc5-next-20140307-sasha-00010-g1f812cb-dirty #143 >>> > >and this is also part of the DEBUG_PAGEALLOC + trinity combo! I suspect >>> > >the root cause it the same as Fengguang's report. >> > >> >The BUG still happens without DEBUG_PAGEALLOC. > Any idea what trinity itself is doing? > > Could you add the following, I just want to make sure the bug isn't > being caused by an overflow: Not hitting that WARN. 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