From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ed1-f70.google.com (mail-ed1-f70.google.com [209.85.208.70]) by kanga.kvack.org (Postfix) with ESMTP id 5B1C96B000D for ; Mon, 5 Nov 2018 11:09:05 -0500 (EST) Received: by mail-ed1-f70.google.com with SMTP id t21-v6so2145727edq.1 for ; Mon, 05 Nov 2018 08:09:05 -0800 (PST) Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com. [148.163.158.5]) by mx.google.com with ESMTPS id c58-v6si13230713ede.329.2018.11.05.08.09.03 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 05 Nov 2018 08:09:04 -0800 (PST) Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id wA5G6CVs064205 for ; Mon, 5 Nov 2018 11:09:02 -0500 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 2njrqh1760-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 05 Nov 2018 11:09:01 -0500 Received: from localhost by e06smtp03.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 5 Nov 2018 16:08:58 -0000 Subject: Re: [PATCH v11 00/26] Speculative page faults References: <1526555193-7242-1-git-send-email-ldufour@linux.vnet.ibm.com> <20181105104204.GB9042@350D> From: Laurent Dufour Date: Mon, 5 Nov 2018 17:08:45 +0100 MIME-Version: 1.0 In-Reply-To: <20181105104204.GB9042@350D> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Message-Id: <8dce53f8-b085-c4a7-3d87-de66bbcdc18c@liunx.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: Balbir Singh , Laurent Dufour Cc: akpm@linux-foundation.org, mhocko@kernel.org, peterz@infradead.org, kirill@shutemov.name, ak@linux.intel.com, dave@stgolabs.net, jack@suse.cz, Matthew Wilcox , khandual@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com, benh@kernel.crashing.org, mpe@ellerman.id.au, paulus@samba.org, Thomas Gleixner , Ingo Molnar , hpa@zytor.com, Will Deacon , Sergey Senozhatsky , sergey.senozhatsky.work@gmail.com, Andrea Arcangeli , Alexei Starovoitov , kemi.wang@intel.com, Daniel Jordan , David Rientjes , Jerome Glisse , Ganesh Mahendran , Minchan Kim , Punit Agrawal , vinayak menon , Yang Shi , linux-kernel@vger.kernel.org, linux-mm@kvack.org, haren@linux.vnet.ibm.com, npiggin@gmail.com, paulmck@linux.vnet.ibm.com, Tim Chen , linuxppc-dev@lists.ozlabs.org, x86@kernel.org Le 05/11/2018 A 11:42, Balbir Singh a A(C)critA : > On Thu, May 17, 2018 at 01:06:07PM +0200, Laurent Dufour wrote: >> This is a port on kernel 4.17 of the work done by Peter Zijlstra to handle >> page fault without holding the mm semaphore [1]. >> >> The idea is to try to handle user space page faults without holding the >> mmap_sem. This should allow better concurrency for massively threaded > > Question -- I presume mmap_sem (rw_semaphore implementation tested against) > was qrwlock? I don't think so, this series doesn't change the mmap_sem definition so it still belongs to the 'struct rw_semaphore'. Laurent.