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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 25E50C43387 for ; Mon, 7 Jan 2019 07:46:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E9767206BB for ; Mon, 7 Jan 2019 07:46:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726485AbfAGHqn (ORCPT ); Mon, 7 Jan 2019 02:46:43 -0500 Received: from mail-wm1-f68.google.com ([209.85.128.68]:35438 "EHLO mail-wm1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725550AbfAGHqm (ORCPT ); Mon, 7 Jan 2019 02:46:42 -0500 Received: by mail-wm1-f68.google.com with SMTP id t200so6541631wmt.0 for ; Sun, 06 Jan 2019 23:46:41 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=2JpkdjLTUq7bQubuFYx96iZehFrzWw/Wgxlqu/gy7DA=; b=QqCHECMLSr35ECDJKwvyYnBd+UJL0u/CtB1sHz4uAfu1qyc3I2Mzs2U1pR1qyrixEL z3YfYDawJpnaJZc1sLJWuv8QOkvOl9gW7hhf0B5AGiglZAE0LxMTFDNVNvWCG9Z/DWsA NrAITGtjTeaU0kcrEYo/FU7xA6YxG3pUYi7hB/f0PuwAVMpvB8mv52vkhPJrF/nEQALn 7kh6GRHKr/P/cQVAndZttpvgSeQo5Xu6adMTe2LiL2Y/eGcQMQI62td4sY2WDrzhjpyt WP83TYGJ+TZtYUqxVMWE73gPBjhId1nZlKJbVVwhZeymMPOIfqD52NaqajenlIkjZJkU A3Zg== X-Gm-Message-State: AJcUukeQMWDvXdHKlCs2+g5x39lR7a2ZWPuXigi0JwSJwc6py9DtOEuB TzWWeC2xC/1zyUzWk7DE+Yk5uA== X-Google-Smtp-Source: ALg8bN4Ls+Vug/2M+orhIAZW0jwN9W3he00mW6moJi3YTyDDeayKkM+3e1V5gMnYkNqec5YiB05mOw== X-Received: by 2002:a1c:22c5:: with SMTP id i188mr7848282wmi.39.1546847200839; Sun, 06 Jan 2019 23:46:40 -0800 (PST) Received: from localhost.localdomain ([151.15.254.62]) by smtp.gmail.com with ESMTPSA id v8sm72098024wrq.53.2019.01.06.23.46.39 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sun, 06 Jan 2019 23:46:40 -0800 (PST) Date: Mon, 7 Jan 2019 08:46:38 +0100 From: Juri Lelli To: luca abeni Cc: syzbot , bp@alien8.de, bristot@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org Subject: Re: WARNING in enqueue_task_dl Message-ID: <20190107074638.GC7213@localhost.localdomain> References: <000000000000b5e346057af4da06@google.com> <0000000000001f4fee057e52b284@google.com> <20190102101518.1d21ba0c@sweethome> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190102101518.1d21ba0c@sweethome> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On 02/01/19 10:15, luca abeni wrote: > Hi all, > (and, happy new year to everyone!) > > this looks similar to a bug we have seen some time ago (a task > switching from SCHED_OTHER to SCHED_DEADLINE while inheriting a > deadline from a SCHED_DEADLINE task triggers the warning)... > > Juri, I think you found a fix for such a bug; has it been committed? Looks similar to the one I proposed this fix for: https://lore.kernel.org/lkml/20181119153201.GB2119@localhost.localdomain/ AFAIK it hasn't been reviewed/tested yet. Could you (or someone) please have a look? Best, - Juri