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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 38F45C433DB for ; Thu, 7 Jan 2021 21:43:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F00E223447 for ; Thu, 7 Jan 2021 21:43:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727801AbhAGVnb (ORCPT ); Thu, 7 Jan 2021 16:43:31 -0500 Received: from mo4-p00-ob.smtp.rzone.de ([85.215.255.20]:30855 "EHLO mo4-p00-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727655AbhAGVna (ORCPT ); Thu, 7 Jan 2021 16:43:30 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1610055577; s=strato-dkim-0002; d=hypervisor.org; h=Message-ID:Subject:To:From:Date:From:Subject:Sender; bh=A86rKVckePq/Tp1JC9QmcGhKMBeceNIQ3Z3HXyDS7r0=; b=m/1zsXLT/82lLWQ10wqReSYUvpOwe2j5DXeK+woW3dZKiONDpWZGQkmtUQyRa8mTV3 jSgUa4rt0Qg6t/WsV/YOpeIgWJPRHn7S8XmCUOxrrXiPUGpRO7T8kHO7XfjGCvKWBfbf UrJ3lr4+OaaLnz5z+Ot+PxSeJmf2NxGsRcBm6Q78wazVhI6puoKH5K3ljq9JKV8LGsKm +siPtHHPrM883d+owOKg5UqdSBQ/I29RJueQv+MOuZ6cMdZ5AiNfyW2X0FISE20vmH9H iyIVW2mmRx5Qy6YMBsH9W3nhFZ7HIBPA1Flx02LsApCtM6M0Es0vp5QuCrekx27l0w4s IqjA== X-RZG-AUTH: ":OWgLVUixa/orYEjgByCmMbha6U0z53RZBchi0p8VsT1fAA5ylDfDuy2BlqsdF5Rpv7WUuLw=" X-RZG-CLASS-ID: mo00 Received: from X220.hypervisor.org by smtp.strato.de (RZmta 47.12.1 DYNA|AUTH) with ESMTPSA id L0973bx07LZg8vi (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate) for ; Thu, 7 Jan 2021 22:35:42 +0100 (CET) Date: Thu, 7 Jan 2021 22:35:41 +0100 From: Udo Steinberg To: LKML Subject: Linux 5.10.5 hung task Message-ID: <20210107223541.2d03619c@X220.hypervisor.org> X-Mailer: X-Mailer 5.0 Gold MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, (Please CC: me as I'm not subscribed to LKML) I'm getting frequent hangs under X11 with Linux 5.10.5 on a Lenovo X1 Carbon 6th Gen laptop with Intel KBL graphics. Below is a trace of what hangs. Any pointers for how to debug this further or any patches are appreciated. Thanks, Udo [ 2602.016651] INFO: task kworker/3:1H:373 blocked for more than 20 seconds. [ 2602.016653] Not tainted 5.10.5 #1 [ 2602.016653] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 2602.016654] task:kworker/3:1H state:D stack: 0 pid: 373 ppid: 2 flags:0x00004000 [ 2602.016659] Workqueue: events_highpri intel_atomic_cleanup_work [ 2602.016660] Call Trace: [ 2602.016663] __schedule+0x1d7/0x520 [ 2602.016665] schedule+0x40/0xe0 [ 2602.016666] schedule_preempt_disabled+0xf/0x20 [ 2602.016667] __ww_mutex_lock.constprop.0+0x4a3/0x830 [ 2602.016668] ? acpi_idle_do_entry+0x50/0x50 [ 2602.016669] intel_unpin_fb_vma+0x20/0xa0 [ 2602.016672] drm_atomic_helper_cleanup_planes+0x4a/0x60 [ 2602.016673] intel_atomic_cleanup_work+0x54/0x100 [ 2602.016675] process_one_work+0x1a8/0x2f0 [ 2602.016676] ? rescuer_thread+0x410/0x410 [ 2602.016677] worker_thread+0x48/0x3d0 [ 2602.016678] ? rescuer_thread+0x410/0x410 [ 2602.016679] kthread+0x136/0x160 [ 2602.016681] ? __kthread_bind_mask+0x60/0x60 [ 2602.016682] ret_from_fork+0x1f/0x30 [ 2622.496742] INFO: task kworker/3:1H:373 blocked for more than 40 seconds. [ 2622.496744] Not tainted 5.10.5 #1 [ 2622.496744] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 2622.496745] task:kworker/3:1H state:D stack: 0 pid: 373 ppid: 2 flags:0x00004000 [ 2622.496750] Workqueue: events_highpri intel_atomic_cleanup_work [ 2622.496751] Call Trace: [ 2622.496754] __schedule+0x1d7/0x520 [ 2622.496756] schedule+0x40/0xe0 [ 2622.496757] schedule_preempt_disabled+0xf/0x20 [ 2622.496758] __ww_mutex_lock.constprop.0+0x4a3/0x830 [ 2622.496759] ? acpi_idle_do_entry+0x50/0x50 [ 2622.496760] intel_unpin_fb_vma+0x20/0xa0 [ 2622.496763] drm_atomic_helper_cleanup_planes+0x4a/0x60 [ 2622.496764] intel_atomic_cleanup_work+0x54/0x100 [ 2622.496766] process_one_work+0x1a8/0x2f0 [ 2622.496767] ? rescuer_thread+0x410/0x410 [ 2622.496768] worker_thread+0x48/0x3d0 [ 2622.496769] ? rescuer_thread+0x410/0x410 [ 2622.496771] kthread+0x136/0x160 [ 2622.496772] ? __kthread_bind_mask+0x60/0x60 [ 2622.496773] ret_from_fork+0x1f/0x30