From patchwork Fri Oct 16 09:18:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jingbo Xu X-Patchwork-Id: 11841123 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C63101752 for ; Fri, 16 Oct 2020 09:18:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ABF9120EDD for ; Fri, 16 Oct 2020 09:18:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406090AbgJPJSx (ORCPT ); Fri, 16 Oct 2020 05:18:53 -0400 Received: from out30-57.freemail.mail.aliyun.com ([115.124.30.57]:54017 "EHLO out30-57.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2405946AbgJPJSx (ORCPT ); Fri, 16 Oct 2020 05:18:53 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R631e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04426;MF=jefflexu@linux.alibaba.com;NM=1;PH=DS;RN=8;SR=0;TI=SMTPD_---0UCBNGHj_1602839931; Received: from localhost(mailfrom:jefflexu@linux.alibaba.com fp:SMTPD_---0UCBNGHj_1602839931) by smtp.aliyun-inc.com(127.0.0.1); Fri, 16 Oct 2020 17:18:51 +0800 From: Jeffle Xu To: axboe@kernel.dk, hch@infradead.org, viro@zeniv.linux.org.uk Cc: linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, ming.lei@redhat.com, joseph.qi@linux.alibaba.com, xiaoguang.wang@linux.alibaba.com Subject: [PATCH v3 0/2] block, iomap: disable iopoll for split bio Date: Fri, 16 Oct 2020 17:18:49 +0800 Message-Id: <20201016091851.93728-1-jefflexu@linux.alibaba.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org This patchset is to fix the potential hang occurred in sync polling. Please refer the following link for background info and the v1 patch: https://patchwork.kernel.org/project/linux-block/patch/20201013084051.27255-1-jefflexu@linux.alibaba.com/ The first patch disables iopoll for split bio in block layer, which is suggested by Ming Lei. The second patch disables iopoll when one dio need to be split into multiple bios. changes since v2: - tune the line length of patch 1 - fix the condition checking whether split needed in patch 2 changes since v1: - adopt the fix suggested by Ming Lei, to disable iopoll for split bio directly - disable iopoll in direct IO routine of blkdev fs and iomap Jeffle Xu (2): block: disable iopoll for split bio block,iomap: disable iopoll when split needed block/blk-merge.c | 14 ++++++++++++++ fs/block_dev.c | 7 +++++++ fs/iomap/direct-io.c | 8 ++++++++ 3 files changed, 29 insertions(+)