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 8094CC43381 for ; Thu, 14 Feb 2019 09:35:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 58F732229F for ; Thu, 14 Feb 2019 09:35:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388510AbfBNJfv (ORCPT ); Thu, 14 Feb 2019 04:35:51 -0500 Received: from tama500.ecl.ntt.co.jp ([129.60.39.148]:43154 "EHLO tama500.ecl.ntt.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726302AbfBNJfv (ORCPT ); Thu, 14 Feb 2019 04:35:51 -0500 Received: from vc1.ecl.ntt.co.jp (vc1.ecl.ntt.co.jp [129.60.86.153]) by tama500.ecl.ntt.co.jp (8.13.8/8.13.8) with ESMTP id x1E9ZJVe003889; Thu, 14 Feb 2019 18:35:19 +0900 Received: from vc1.ecl.ntt.co.jp (localhost [127.0.0.1]) by vc1.ecl.ntt.co.jp (Postfix) with ESMTP id 5CDCFEA7DDB; Thu, 14 Feb 2019 18:35:19 +0900 (JST) Received: from jcms-pop11.ecl.ntt.co.jp (jcms-pop11.ecl.ntt.co.jp [129.60.87.132]) by vc1.ecl.ntt.co.jp (Postfix) with ESMTP id 5005AEA7DD5; Thu, 14 Feb 2019 18:35:19 +0900 (JST) Received: from [IPv6:::1] (unknown [129.60.241.209]) by jcms-pop11.ecl.ntt.co.jp (Postfix) with ESMTPSA id 392C770C038B; Thu, 14 Feb 2019 18:35:19 +0900 (JST) From: Kazuo Ito Subject: [PATCH v2 0/2] pNFS block/SCSI layouts read-modify-write fix&improvement Message-ID: <92b9e2a4-8880-3fc6-1f6a-e5ab85ed96e6@lab.ntt.co.jp> Date: Thu, 14 Feb 2019 18:34:57 +0900 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.5.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-CC-Mail-RelayStamp: 1 To: Trond Myklebust , anna.schumaker@netapp.com, linux-nfs@vger.kernel.org, konishi.ryusuke@lab.ntt.co.jp, =?UTF-8?B?T1PmuKHovro=?= X-TM-AS-MML: disable Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org This set of patches attempt to fix potential data integrity problem in nfs_want_read_modify_write() and improve full page overwrite performance of pNFS block/SCSI layouts. The patch set comprises of two patches: - 1/2 "pNFS: Fix potential corruption of page being written" fixes the integrity issue - 2/2 "pNFS: Avoid read/modify/write when it is not necessary" addresses the cases where read/modify/write was requested for a full- page write. v1 -> v2: - added the fix for missing PagePrivate in the pNFS block layout - made the check for full page write a separate inline function - merged the duplicated code for the pNFS block/SCSI layouts and for the other layout + normal NFS - type usage clean up (int to bool, unsigned to unsigned int) kazuo ito (2): pNFS: Fix potential corruption of page being written pNFS: Avoid read/modify/write when it is not necessary fs/nfs/file.c | 40 ++++++++++++++++++++++++++-------------- 1 file changed, 26 insertions(+), 14 deletions(-) -- 2.20.1