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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=no 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 259BEC3A59F for ; Tue, 27 Aug 2019 02:06:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 03BB2206E0 for ; Tue, 27 Aug 2019 02:06:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728631AbfH0CGQ (ORCPT ); Mon, 26 Aug 2019 22:06:16 -0400 Received: from out30-42.freemail.mail.aliyun.com ([115.124.30.42]:39784 "EHLO out30-42.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728546AbfH0CGQ (ORCPT ); Mon, 26 Aug 2019 22:06:16 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R161e4;CH=green;DM=||false|;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04420;MF=joseph.qi@linux.alibaba.com;NM=1;PH=DS;RN=5;SR=0;TI=SMTPD_---0TaZ5Pn4_1566871552; Received: from localhost(mailfrom:joseph.qi@linux.alibaba.com fp:SMTPD_---0TaZ5Pn4_1566871552) by smtp.aliyun-inc.com(127.0.0.1); Tue, 27 Aug 2019 10:05:52 +0800 From: Joseph Qi To: Theodore Ts'o , Andreas Dilger , Jan Kara Cc: linux-ext4@vger.kernel.org, Dave Chinner Subject: [PATCH 0/3] Revert parallel dio reads Date: Tue, 27 Aug 2019 10:05:49 +0800 Message-Id: <1566871552-60946-1-git-send-email-joseph.qi@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org This patch set is trying to revert parallel dio reads feature at present since it causes significant performance regression in mixed random read/write scenario. Joseph Qi (3): Revert "ext4: remove EXT4_STATE_DIOREAD_LOCK flag" Revert "ext4: fix off-by-one error when writing back pages before dio read" Revert "ext4: Allow parallel DIO reads" fs/ext4/ext4.h | 17 +++++++++++++++++ fs/ext4/extents.c | 19 ++++++++++++++----- fs/ext4/inode.c | 47 +++++++++++++++++++++++++++++++---------------- fs/ext4/ioctl.c | 4 ++++ fs/ext4/move_extent.c | 4 ++++ fs/ext4/super.c | 12 +++++++----- 6 files changed, 77 insertions(+), 26 deletions(-) -- 1.8.3.1