From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pb0-f49.google.com (mail-pb0-f49.google.com [209.85.160.49]) by kanga.kvack.org (Postfix) with ESMTP id D49FD6B0035 for ; Thu, 13 Mar 2014 15:00:08 -0400 (EDT) Received: by mail-pb0-f49.google.com with SMTP id jt11so1511818pbb.36 for ; Thu, 13 Mar 2014 12:00:08 -0700 (PDT) Received: from g4t3425.houston.hp.com (g4t3425.houston.hp.com. [15.201.208.53]) by mx.google.com with ESMTPS id a3si2050268pay.307.2014.03.13.12.00.07 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Thu, 13 Mar 2014 12:00:07 -0700 (PDT) Message-ID: <1394737202.2452.8.camel@buesod1.americas.hpqcorp.net> Subject: Re: mm: mmap_sem lock assertion failure in __mlock_vma_pages_range From: Davidlohr Bueso Date: Thu, 13 Mar 2014 12:00:02 -0700 In-Reply-To: <531F8C3A.1040502@oracle.com> 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> <531F8C3A.1040502@oracle.com> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Sasha Levin Cc: Andrew Morton , "linux-mm@kvack.org" , Michel Lespinasse , Rik van Riel , Vlastimil Babka , LKML On Tue, 2014-03-11 at 18:20 -0400, Sasha Levin wrote: > 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. Sasha, could you please try the following patch: https://lkml.org/lkml/2014/3/13/312 thanks. -- 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