From patchwork Thu Oct 15 07:40:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jingbo Xu X-Patchwork-Id: 11838765 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 E0DF31744 for ; Thu, 15 Oct 2020 07:40:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C903C22250 for ; Thu, 15 Oct 2020 07:40:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728386AbgJOHke (ORCPT ); Thu, 15 Oct 2020 03:40:34 -0400 Received: from out30-43.freemail.mail.aliyun.com ([115.124.30.43]:45827 "EHLO out30-43.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726103AbgJOHke (ORCPT ); Thu, 15 Oct 2020 03:40:34 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R771e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04395;MF=jefflexu@linux.alibaba.com;NM=1;PH=DS;RN=8;SR=0;TI=SMTPD_---0UC4eKmP_1602747631; Received: from localhost(mailfrom:jefflexu@linux.alibaba.com fp:SMTPD_---0UC4eKmP_1602747631) by smtp.aliyun-inc.com(127.0.0.1); Thu, 15 Oct 2020 15:40:31 +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: [v2 0/2] block, iomap: disable iopoll for split bio Date: Thu, 15 Oct 2020 15:40:29 +0800 Message-Id: <20201015074031.91380-1-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 occured 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 IO request need to be split into multiple bios. 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 | 16 ++++++++++++++++ fs/block_dev.c | 7 +++++++ fs/iomap/direct-io.c | 9 ++++++++- 3 files changed, 31 insertions(+), 1 deletion(-)