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=-10.5 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 A838BC433E7 for ; Thu, 3 Sep 2020 09:12:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7F65320709 for ; Thu, 3 Sep 2020 09:12:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727794AbgICJMj (ORCPT ); Thu, 3 Sep 2020 05:12:39 -0400 Received: from mx2.suse.de ([195.135.220.15]:41408 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726268AbgICJMi (ORCPT ); Thu, 3 Sep 2020 05:12:38 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 13F96AC4C; Thu, 3 Sep 2020 09:12:38 +0000 (UTC) Received: by ds.suse.cz (Postfix, from userid 10065) id 3CD95DA6E0; Thu, 3 Sep 2020 11:11:24 +0200 (CEST) Date: Thu, 3 Sep 2020 11:11:23 +0200 From: David Sterba To: kernel test robot Cc: Goldwyn Rodrigues , David Sterba , LKML , lkp@lists.01.org, lkp@intel.com, ltp@lists.linux.it, linux-btrfs@vger.kernel.org Subject: Re: [btrfs] c0aaf9b7a1: ltp: stuck at diotest4 Message-ID: <20200903091123.GO28318@suse.cz> Reply-To: dsterba@suse.cz Mail-Followup-To: dsterba@suse.cz, kernel test robot , Goldwyn Rodrigues , David Sterba , LKML , lkp@lists.01.org, lkp@intel.com, ltp@lists.linux.it, linux-btrfs@vger.kernel.org References: <20200903062837.GA3654@xsang-OptiPlex-9020> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200903062837.GA3654@xsang-OptiPlex-9020> User-Agent: Mutt/1.5.23.1-rc1 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Sep 03, 2020 at 02:28:37PM +0800, kernel test robot wrote: > Greeting, > > FYI, we noticed the following commit (built with gcc-9): > > commit: c0aaf9b7a114f6b75e0da97be7d99c102347a751 ("btrfs: switch to iomap_dio_rw() for dio") > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master That's probably the O_DIRECT + O_(D)SYNC deadlock that was found recently. One of the cases in diotest4 does open(filename, O_DIRECT | O_RDWR | O_SYNC) Fix is work in progress, thanks for the report.