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=-1.0 required=3.0 tests=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 DFC38C49ED7 for ; Fri, 13 Sep 2019 14:13:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B33EA20717 for ; Fri, 13 Sep 2019 14:13:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388836AbfIMONz convert rfc822-to-8bit (ORCPT ); Fri, 13 Sep 2019 10:13:55 -0400 Received: from mga11.intel.com ([192.55.52.93]:53775 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388349AbfIMONz (ORCPT ); Fri, 13 Sep 2019 10:13:55 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 13 Sep 2019 07:13:54 -0700 X-IronPort-AV: E=Sophos;i="5.64,489,1559545200"; d="scan'208";a="385420725" Received: from jacubero-mobl.amr.corp.intel.com ([10.254.63.107]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 13 Sep 2019 07:13:54 -0700 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Subject: Re: [BUG RT] backtrace on v5.2.9-rt3 From: Sean V Kelley In-Reply-To: <20190913134243.3zoliue6yqfzyatl@linutronix.de> Date: Fri, 13 Sep 2019 07:13:53 -0700 Cc: Steven Rostedt , Sean V Kelley , LKML , linux-rt-users , Thomas Gleixner Content-Transfer-Encoding: 8BIT Message-Id: <67E837E1-E67B-4C49-96EF-4626CFE71954@linux.intel.com> References: <20190830120106.301bd9f3@gandalf.local.home> <20190913134243.3zoliue6yqfzyatl@linutronix.de> To: Sebastian Andrzej Siewior X-Mailer: Apple Mail (2.3445.104.11) Sender: linux-rt-users-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rt-users@vger.kernel.org > On Sep 13, 2019, at 6:42 AM, Sebastian Andrzej Siewior wrote: > > On 2019-08-30 12:01:06 [-0400], Steven Rostedt wrote: >> >> I'm triggering the following call splat on 5.2-rt. >> >> [ 63.099414] 006: BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:968 >> [ 63.108423] 006: in_atomic(): 0, irqs_disabled(): 1, pid: 173, name: kworker/6:1 > … >> [ 63.141041] 006: Call Trace: >> [ 63.143916] 006: dump_stack+0x5c/0x80 >> [ 63.147654] 006: ___might_sleep.cold.92+0x8d/0x9a >> [ 63.152423] 006: rt_spin_lock+0x31/0x40 >> [ 63.156332] 006: intel_engine_breadcrumbs_irq+0x56/0x320 [i915] >> [ 63.162350] 006: intel_engine_signal_breadcrumbs+0x11/0x20 [i915] >> [ 63.168540] 006: i915_hangcheck_elapsed+0x199/0x420 [i915] > … >> [ 63.309375] 006: process_one_work+0x1e8/0x4c0 > … >> Attached is the config and the full dmesg. > > just for book keeping: Clark reported the same thing, posted patches and > will try an alternative on Monday (as far as I'm been told). I will > continue to reply in the other thread. > > Sebastian I was able to reproduce Clark’s earlier splat report and also test the posted patches with no issues. This was also the approach that Chris Wilson suggested. I agree Steven’s issue looks to be the same, but with LPC did not have time to go back to it. Sean