From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E3031C04EB8 for ; Tue, 4 Dec 2018 17:10:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AC4702082B for ; Tue, 4 Dec 2018 17:10:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AC4702082B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ACULAB.COM Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727009AbeLDRKX convert rfc822-to-8bit (ORCPT ); Tue, 4 Dec 2018 12:10:23 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:47846 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726367AbeLDRKX (ORCPT ); Tue, 4 Dec 2018 12:10:23 -0500 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-130-lQ7aur7HOVqDgSvQvocyiA-1; Tue, 04 Dec 2018 17:10:19 +0000 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b::d117) by AcuMS.aculab.com (fd9f:af1c:a25b::d117) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Tue, 4 Dec 2018 17:10:28 +0000 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Tue, 4 Dec 2018 17:10:28 +0000 From: David Laight To: "'john.hubbard@gmail.com'" , Andrew Morton , "linux-mm@kvack.org" CC: Jan Kara , Tom Talpey , Al Viro , Christian Benvenuti , "Christoph Hellwig" , Christopher Lameter , Dan Williams , Dennis Dalessandro , Doug Ledford , "Jason Gunthorpe" , Jerome Glisse , Matthew Wilcox , Michal Hocko , Mike Marciniszyn , Ralph Campbell , LKML , "linux-fsdevel@vger.kernel.org" , John Hubbard Subject: RE: [PATCH 0/2] put_user_page*(): start converting the call sites Thread-Topic: [PATCH 0/2] put_user_page*(): start converting the call sites Thread-Index: AQHUi2bDGCD6zYfsq0K8yN3qDVFoEKVu0VeA Date: Tue, 4 Dec 2018 17:10:28 +0000 Message-ID: References: <20181204001720.26138-1-jhubbard@nvidia.com> In-Reply-To: <20181204001720.26138-1-jhubbard@nvidia.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 X-MC-Unique: lQ7aur7HOVqDgSvQvocyiA-1 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: john.hubbard@gmail.com > Sent: 04 December 2018 00:17 > > Summary: I'd like these two patches to go into the next convenient cycle. > I *think* that means 4.21. > > Details > > At the Linux Plumbers Conference, we talked about this approach [1], and > the primary lingering concern was over performance. Tom Talpey helped me > through a much more accurate run of the fio performance test, and now > it's looking like an under 1% performance cost, to add and remove pages > from the LRU (this is only paid when dealing with get_user_pages) [2]. So > we should be fine to start converting call sites. > > This patchset gets the conversion started. Both patches already had a fair > amount of review. Shouldn't the commit message contain actual details of the change? David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)