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=-3.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 0A5F7C2B9F4 for ; Tue, 22 Jun 2021 05:45:22 +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 BFF576115B for ; Tue, 22 Jun 2021 05:45:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BFF576115B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bugs.launchpad.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:42462 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lvYG9-0007AL-Fu for qemu-devel@archiver.kernel.org; Tue, 22 Jun 2021 00:43:37 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57312) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lvXzd-00073B-2u for qemu-devel@nongnu.org; Tue, 22 Jun 2021 00:26:33 -0400 Received: from indium.canonical.com ([91.189.90.7]:56400) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lvXza-000520-2d for qemu-devel@nongnu.org; Tue, 22 Jun 2021 00:26:32 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.93 #5 (Debian)) id 1lvXzL-00014F-K0 for ; Tue, 22 Jun 2021 04:26:16 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 306D42E81A8 for ; Tue, 22 Jun 2021 04:26:12 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Tue, 22 Jun 2021 04:18:32 -0000 From: Launchpad Bug Tracker <1844053@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=Expired; importance=Undecided; assignee=None; X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: jamespharvey20 janitor slesru th-huth X-Launchpad-Bug-Reporter: James Harvey (jamespharvey20) X-Launchpad-Bug-Modifier: Launchpad Janitor (janitor) References: <156855280668.581.6516749257263798071.malonedeb@wampee.canonical.com> Message-Id: <162433551286.20423.5541063759299672636.malone@loganberry.canonical.com> Subject: [Bug 1844053] Re: task blocked for more than X seconds - events drm_fb_helper_dirty_work X-Launchpad-Message-Rationale: Subscriber (QEMU) @qemu-devel-ml X-Launchpad-Message-For: qemu-devel-ml Precedence: bulk X-Generated-By: Launchpad (canonical.com); Revision="3619498b5524a71696f3dd612f4d11bd63449bb1"; Instance="production" X-Launchpad-Hash: 200decaf1bc240111fbc9e10fadc9d7f5cbb8f17 Received-SPF: none client-ip=91.189.90.7; envelope-from=bounces@canonical.com; helo=indium.canonical.com X-Spam_score_int: -65 X-Spam_score: -6.6 X-Spam_bar: ------ X-Spam_report: (-6.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Bug 1844053 <1844053@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" [Expired for QEMU because there has been no activity for 60 days.] ** Changed in: qemu Status: Incomplete =3D> Expired -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1844053 Title: task blocked for more than X seconds - events drm_fb_helper_dirty_work Status in QEMU: Expired Bug description: I've had bunches of these errors on 9 different boots, between 2019-08-21 and now, with Arch host and guest, from linux 5.1.16 to 5.2.14 on host and guest, with QEMU 4.0.0 and 4.1.0. spice 0.14.2, spice-gtk 0.37, spice-protocol 0.14.0, virt-viewer 8.0. I've been fighting with some other issues related to a 5.2 btrfs regression, a QEMU qxl regression (see bug 1843151) which I ran into when trying to temporarily abandon virtio-vga, and I haven't paid enough attention to what impact specifically this virtio_gpu issue has on the system In journalctl, I can see I often rebooted minutes after they occurred, but sometimes much later. That must mean whenever I saw it happen that I rebooted the VM, or potentially it impacted functionality of the system. Please let me know if and how I can get more information for you if needed. I've replicated this on both a system with integrated ASPEED video, and on an AMD Vega 64 running amdgpu. As an example, I have one boot which reported at 122 seconds, 245, 368, 491, 614, 737, 860, 983, 1105, 1228, then I rebooted. I have another that reported 122/245/368/491/614/737, went away for 10 minutes, then started reporting again 122/245/368/491, and went away. Then, I rebooted about 20 hours later. Host system has no graphical impact when this happens, and logs nothing in its journalctl. Guest is tty mode only, with kernel argument "video=3D1280x1024". No x server. =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D INFO: task kworker/0:1:15 blocked for more than 122 seconds. =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Not tainted 5.2.14-1 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:1 D 0 15 2 0x800004000 Workqueue: events drm_fb_helper_dirty_work [drm_kms_helper] Call Trace: =C2=A0? __schedule+0x27f/0x6d0 =C2=A0schedule+0x3d/0xc0 =C2=A0virtio_gpu_queue_fenced_ctrl_buffer+0xa1/0x130 [virtio_gpu] =C2=A0? wait_woken+0x80/0x80 =C2=A0virtio_gpu_surface_dirty+0x2a5/0x300 [virtio_gpu] =C2=A0drm_fb_helper_dirty_work+0x156/0x160 [drm_kms_helper] =C2=A0process_one_work+0x19a/0x3b0 =C2=A0worker_tread+0x50/0x3a0 =C2=A0kthread+0xfd/0x130 =C2=A0? process_one_work+0x3b0/0x3b0 =C2=A0? kthread_park+0x80/0x80 =C2=A0ret_from_fork+0x35/0x40 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D /usr/bin/qemu-system-x86_64 \ =C2=A0=C2=A0=C2=A0-name vm,process=3Dqemu:vm \ =C2=A0=C2=A0=C2=A0-no-user-config \ =C2=A0=C2=A0=C2=A0-nodefaults \ =C2=A0=C2=A0=C2=A0-nographic \ =C2=A0=C2=A0=C2=A0-uuid \ =C2=A0=C2=A0=C2=A0-pidfile \ =C2=A0=C2=A0=C2=A0-machine q35,accel=3Dkvm,vmport=3Doff,dump-guest-core= =3Doff \ =C2=A0=C2=A0=C2=A0-cpu SandyBridge-IBRS \ =C2=A0=C2=A0=C2=A0-smp cpus=3D4,cores=3D2,threads=3D1,sockets=3D2 \ =C2=A0=C2=A0=C2=A0-m 4G \ =C2=A0=C2=A0=C2=A0-drive if=3Dpflash,format=3Draw,readonly,file=3D/usr/sh= are/ovmf/x64/OVMF_CODE.fd \ =C2=A0=C2=A0=C2=A0-drive if=3Dpflash,format=3Draw,file=3D/var/qemu/efivar= s/vm.fd \ =C2=A0=C2=A0=C2=A0-monitor telnet:localhost:8000,server,nowait,nodelay \ =C2=A0=C2=A0=C2=A0-spice unix,addr=3D/tmp/spice.vm.sock,disable-ticketing= \ =C2=A0=C2=A0=C2=A0-device ioh3420,id=3Dpcie.1,bus=3Dpcie.0,slot=3D0 \ =C2=A0=C2=A0=C2=A0-device virtio-vga,bus=3Dpcie.1,addr=3D0 \ =C2=A0=C2=A0=C2=A0-usbdevice tablet \ =C2=A0=C2=A0=C2=A0-netdev bridge,id=3Dnetwork0,br=3Dbr0 \ =C2=A0=C2=A0=C2=A0-device virtio-net-pci,netdev=3Dnetwork0,mac=3DF4:F6:34= :F6:34:2d,bus=3Dpcie.0,addr=3D3 \ =C2=A0=C2=A0=C2=A0-device virtio-scsi-pci,id=3Dscsi1 \ =C2=A0=C2=A0=C2=A0-drive driver=3Draw,node-name=3Dhd0,file=3D/dev/lvm/vm,= if=3Dnone,discard=3Dunmap,cache=3Dnone,aio=3Dthreads To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1844053/+subscriptions