Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751583AbdINJPm (ORCPT ); Thu, 14 Sep 2017 05:15:42 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:52329 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751385AbdINJPj (ORCPT ); Thu, 14 Sep 2017 05:15:39 -0400 Subject: Re: [PATCH v3 04/20] mm: VMA sequence count To: Sergey Senozhatsky Cc: paulmck@linux.vnet.ibm.com, peterz@infradead.org, akpm@linux-foundation.org, kirill@shutemov.name, ak@linux.intel.com, mhocko@kernel.org, dave@stgolabs.net, jack@suse.cz, Matthew Wilcox , benh@kernel.crashing.org, mpe@ellerman.id.au, paulus@samba.org, Thomas Gleixner , Ingo Molnar , hpa@zytor.com, Will Deacon , Sergey Senozhatsky , linux-kernel@vger.kernel.org, linux-mm@kvack.org, haren@linux.vnet.ibm.com, khandual@linux.vnet.ibm.com, npiggin@gmail.com, bsingharora@gmail.com, Tim Chen , linuxppc-dev@lists.ozlabs.org, x86@kernel.org References: <1504894024-2750-1-git-send-email-ldufour@linux.vnet.ibm.com> <1504894024-2750-5-git-send-email-ldufour@linux.vnet.ibm.com> <20170913115354.GA7756@jagdpanzerIV.localdomain> <44849c10-bc67-b55e-5788-d3c6bb5e7ad1@linux.vnet.ibm.com> <20170914003116.GA599@jagdpanzerIV.localdomain> <441ff1c6-72a7-5d96-02c8-063578affb62@linux.vnet.ibm.com> <20170914081358.GG599@jagdpanzerIV.localdomain> <26fa0b71-4053-5af7-baa0-e5fff9babf41@linux.vnet.ibm.com> <20170914091101.GH599@jagdpanzerIV.localdomain> From: Laurent Dufour Date: Thu, 14 Sep 2017 11:15:27 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 MIME-Version: 1.0 In-Reply-To: <20170914091101.GH599@jagdpanzerIV.localdomain> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 17091409-0008-0000-0000-00000496E233 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17091409-0009-0000-0000-00001E28012A Message-Id: <9605ce43-0f61-48d7-88e2-88220b773494@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-09-14_02:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1707230000 definitions=main-1709140137 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 362 Lines: 10 On 14/09/2017 11:11, Sergey Senozhatsky wrote: > On (09/14/17 10:58), Laurent Dufour wrote: > [..] >> That's right, but here this is the sequence counter mm->mm_seq, not the >> vm_seq one. > > d'oh... you are right. So I'm doubting about the probability of a deadlock here, but I don't like to see lockdep complaining. Is there an easy way to make it happy ?