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=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, 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 8D47DC04AB1 for ; Mon, 13 May 2019 08:11:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5B6B920818 for ; Mon, 13 May 2019 08:11:08 +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="nv7h/UvJ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728047AbfEMILH (ORCPT ); Mon, 13 May 2019 04:11:07 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:56410 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725928AbfEMILG (ORCPT ); Mon, 13 May 2019 04:11:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.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:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=wWOMWrWF1Ur0bcF3/YS5svtmVGvjX6Ex1p7xTjESYDk=; b=nv7h/UvJuBJ7dWul7XRjKHR1P sU+SUaWmGuZxMAzUXcqvq2DK1a8b7gCdfsRGMENSoeFmGPCOBY0eBtIoAMg16WaGlLBKaiyp/CveN sl8JS6Df2QUVKd5djT7l/TU7A8269cG2R9tK5A782crET+cspGuX/yNAt4lNhG671H1CORukHmXFZ 9XsNffWGvd10f8micKvsvmiwb9aHfxpV/DEMQo8BnAFiHfdN41HhgRfAttc9CMMP3A+QDSuZ1hDuE JeoTsqe6NpW7B+hdYSsVcbrbg5j1gHHHyMdh46Wdy8nh74pgysUHlGKUu9RTRydtou3PhEpZ5H204 v/W6l0tdA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1hQ62w-0003NE-GI; Mon, 13 May 2019 08:10:54 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 4F0FC2029FD7A; Mon, 13 May 2019 10:10:52 +0200 (CEST) Date: Mon, 13 May 2019 10:10:52 +0200 From: Peter Zijlstra To: "Paul E. McKenney" Cc: Steven Rostedt , linux-kernel@vger.kernel.org, andrea.parri@amarulasolutions.com, Thomas Gleixner , Ingo Molnar , Juri Lelli , Morten Rasmussen , joelaf@google.com, Vincent Guittot , Sebastian Andrzej Siewior Subject: Re: Question about sched_setaffinity() Message-ID: <20190513081052.GJ2623@hirez.programming.kicks-ass.net> References: <20190430105129.GA3923@linux.ibm.com> <20190430115551.GT2623@hirez.programming.kicks-ass.net> <20190501191213.GX3923@linux.ibm.com> <20190501151655.51469a4c@gandalf.local.home> <20190501202713.GY3923@linux.ibm.com> <20190507221613.GA11057@linux.ibm.com> <20190509173654.GA23530@linux.ibm.com> <20190509193625.GA12455@linux.ibm.com> <20190510120819.GR2589@hirez.programming.kicks-ass.net> <20190510230742.GY3923@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190510230742.GY3923@linux.ibm.com> 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 On Fri, May 10, 2019 at 04:07:42PM -0700, Paul E. McKenney wrote: > > The below trace explain the issue. Some Paul person did it, see below. > > It's broken per construction :-) > > *facepalm* Hence the very strange ->cpus_allowed mask. I really > should have figured that one out. I guess it's called a torture framework for a reason ;-)