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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 4B3B5C43331 for ; Wed, 1 Apr 2020 16:16:27 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E493220658 for ; Wed, 1 Apr 2020 16:16:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E493220658 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=proxmox.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:34390 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jJg2U-0001p9-57 for qemu-devel@archiver.kernel.org; Wed, 01 Apr 2020 12:16:26 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59352) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jJg1C-0000M7-UP for qemu-devel@nongnu.org; Wed, 01 Apr 2020 12:15:07 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jJg1B-0000pP-SJ for qemu-devel@nongnu.org; Wed, 01 Apr 2020 12:15:06 -0400 Received: from proxmox-new.maurer-it.com ([212.186.127.180]:20985) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jJg19-0000m0-Kd; Wed, 01 Apr 2020 12:15:03 -0400 Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id A17E94594E; Wed, 1 Apr 2020 18:14:59 +0200 (CEST) Date: Wed, 1 Apr 2020 17:37:45 +0200 (CEST) From: Dietmar Maurer To: Kevin Wolf Message-ID: <997901084.0.1585755465486@webmail.proxmox.com> In-Reply-To: <20200401103748.GA4680@linux.fritz.box> References: <658260883.24.1585644382441@webmail.proxmox.com> <20200331125804.GE7030@linux.fritz.box> <303038276.59.1585665152860@webmail.proxmox.com> <787d7517-bf56-72c7-d197-2313a864e05f@virtuozzo.com> <713436887.61.1585668262838@webmail.proxmox.com> <20200331153719.GI7030@linux.fritz.box> <518198448.62.1585671498399@webmail.proxmox.com> <20200401103748.GA4680@linux.fritz.box> Subject: Re: bdrv_drained_begin deadlock with io-threads MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Priority: 3 Importance: Normal X-Mailer: Open-Xchange Mailer v7.10.2-Rev23 X-Originating-Client: open-xchange-appsuite X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 212.186.127.180 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Dietmar Maurer Cc: Vladimir Sementsov-Ogievskiy , qemu-block@nongnu.org, Sergio Lopez , "qemu-devel@nongnu.org" , Max Reitz , Stefan Hajnoczi , "jsnow@redhat.com" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" > > I really nobody else able to reproduce this (somebody already tried to reproduce)? > > I can get hangs, but that's for job_completed(), not for starting the > job. Also, my hangs have a non-empty bs->tracked_requests, so it looks > like a different case to me. Please can you post the command line args of your VM? I use something like ./x86_64-softmmu/qemu-system-x86_64 -chardev 'socket,id=qmp,path=/var/run/qemu-server/101.qmp,server,nowait' -mon 'chardev=qmp,mode=control' -pidfile /var/run/qemu-server/101.pid -m 1024 -object 'iothread,id=iothread-virtioscsi0' -device 'virtio-scsi-pci,id=virtioscsi0,iothread=iothread-virtioscsi0' -drive 'file=/backup/disk3/debian-buster.raw,if=none,id=drive-scsi0,format=raw,cache=none,aio=native,detect-zeroes=on' -device 'scsi-hd,bus=virtioscsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0,id=scsi0' -machine "type=pc,accel=kvm" Do you also run "stress-ng -d 5" indied the VM?