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=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 0BCFCC433DB for ; Fri, 15 Jan 2021 09:14:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A9D09233EE for ; Fri, 15 Jan 2021 09:14:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727472AbhAOJOG (ORCPT ); Fri, 15 Jan 2021 04:14:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52548 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726652AbhAOJOF (ORCPT ); Fri, 15 Jan 2021 04:14:05 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 25066C061757 for ; Fri, 15 Jan 2021 01:13:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.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=SIFhfiL1Z14MrasYfZQFoTuOWX0kSO+EDmZivWAJL+Y=; b=Kzv0oyyN8iRAtbg02Mi9CDFixF v5jLs4InC1GkjgDaLa/sIFLu13F4e0+6vldWXJO33U0fyh1eGwNuiFegTFI5gOoHe9lHUmkLpVI5b 12Kl7SFVZlB2dBACHI+tyLmBkcT4iuaxbKkNOCz8dDtXjD7Y2Z5F+DuKwF3s0TrcreW19mPuKNypV IebG+hHy1PFCx8jOWcDlyZY+d9/KBES59NP25hgBaHIe4z/eFEOmMq9w/g+c7B3Mtx/dH9SL89yGV ioODbl68y438EZ491aUsKm4WmLndwcYwfnCfbxGaqKuGCRRJlGW+69I1EwF9n5DRyK6sTNsrCw4Ya Ywps2Jvw==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux)) id 1l0L97-008iCQ-CA; Fri, 15 Jan 2021 09:11:57 +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 B9B20305815; Fri, 15 Jan 2021 10:11:51 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 80C20200E0BD2; Fri, 15 Jan 2021 10:11:51 +0100 (CET) Date: Fri, 15 Jan 2021 10:11:51 +0100 From: Peter Zijlstra To: "Paul E. McKenney" Cc: Thomas Gleixner , Lai Jiangshan , linux-kernel@vger.kernel.org, Valentin Schneider , Qian Cai , Vincent Donnefort , Dexuan Cui , Lai Jiangshan , Vincent Guittot , Steven Rostedt Subject: Re: [PATCH -tip V3 0/8] workqueue: break affinity initiatively Message-ID: References: <20201226025117.2770-1-jiangshanlai@gmail.com> <87o8hv7pnd.fsf@nanos.tec.linutronix.de> <20210111180907.GE2743@paulmck-ThinkPad-P72> <20210111215052.GA19589@paulmck-ThinkPad-P72> <20210112171411.GA22823@paulmck-ThinkPad-P72> <20210112235324.GA17895@paulmck-ThinkPad-P72> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210112235324.GA17895@paulmck-ThinkPad-P72> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 12, 2021 at 03:53:24PM -0800, Paul E. McKenney wrote: > An SRCU-P run on the new series reproduced the warning below. Repeat-by: > > tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 10 --configs "112*SRCU-P" --bootargs "rcupdate.rcu_cpu_stall_suppress_at_boot=1 torture.disable_onoff_at_boot rcupdate.rcu_task_stall_timeout=30000 rcutree.softirq=0" --trust-make Lemme go wake up an EX ;-) Anyway, I've folded my patch: https://lkml.kernel.org/r/YABknAqDe4h35+GY@hirez.programming.kicks-ass.net back into the series, so be found here: git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/urgent and will start testing on that while I continue to ponder the rescuer mysteries.