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=-0.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, 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 5010BC433DF for ; Tue, 16 Jun 2020 08:20:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2BDA720767 for ; Tue, 16 Jun 2020 08:20:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="baBP6LaR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727818AbgFPIUs (ORCPT ); Tue, 16 Jun 2020 04:20:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33598 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726261AbgFPIUq (ORCPT ); Tue, 16 Jun 2020 04:20:46 -0400 Received: from merlin.infradead.org (unknown [IPv6:2001:8b0:10b:1231::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 80C7FC05BD43 for ; Tue, 16 Jun 2020 01:20:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=v6Kvrp5YxuyE3OJwdnbigwu/+C45nCnzYkGt6Fojw88=; b=baBP6LaRRx2Up9n+9WmJ8N8s8s 2KtsEvci5rCKwB48U7G2BX757UAP2/Xg9OYvJMvMmx3quRdEe2OTW3e8eUUIWokI74WT8dGRd9wtZ 5e+oH8qXbV4YA3YS7LenFNzN1vJSPblLYQWDGvxmHJJWQ7C74v12CNZrsUQCRV5hb8ZtcwwUWVkR5 XgVhleAlugPl4S3Eef/1p/3tEuQV+QMcXqVQsvcI8pbfYdhNm5ONU50EQZGzSJsK7Bk8snfh9+Obr LEfceChZaWqed0rqt+E/GkvORRDGE/r0q2xqWVm0AwJIvHzdiRXgYZOpISvkRp8D7wstNp90qpboA 3Anv67+w==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jl6pE-0003eU-4Z; Tue, 16 Jun 2020 08:20:08 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id D734430018A; Tue, 16 Jun 2020 10:20:03 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 672A72B9CA588; Tue, 16 Jun 2020 10:20:03 +0200 (CEST) Date: Tue, 16 Jun 2020 10:20:03 +0200 From: Peter Zijlstra To: Daniel Wagner Cc: Juri Lelli , Daniel Bristot de Oliveira , Dmitry Vyukov , luca abeni , Thomas Gleixner , syzbot , Borislav Petkov , "H. Peter Anvin" , LKML , Andy Lutomirski , Ingo Molnar , syzkaller-bugs , the arch/x86 maintainers Subject: Re: WARNING in enqueue_task_dl Message-ID: <20200616082003.GM2531@hirez.programming.kicks-ass.net> References: <000000000000b5e346057af4da06@google.com> <20181119130718.69eddf46@luca64> <20181119125241.GC9761@hirez.programming.kicks-ass.net> <20181119134349.GA2119@localhost.localdomain> <20181119153201.GB2119@localhost.localdomain> <20190724044516.GA643@sol.localdomain> <20200616065359.ugoismxzpkkkkwjp@beryllium.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200616065359.ugoismxzpkkkkwjp@beryllium.lan> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jun 16, 2020 at 08:53:59AM +0200, Daniel Wagner wrote: > I've tested this patch against 5.8-rc1. Without the fix, after around 2 hours > the warning was triggered by the reproducer. With the patch, it survived > roughly 12 hours without the warning. > > Tested-by: Daniel Wagner Thanks, have it now.