Received: by 2002:a25:ad19:0:0:0:0:0 with SMTP id y25csp2619645ybi; Thu, 18 Jul 2019 11:18:22 -0700 (PDT) X-Google-Smtp-Source: APXvYqxNsbRv/mvoGTJBdO5L3tqlmuIOvgoP8rpiwdsR5IigrGqux/dOoPmjdbriOTz46jaG8Cpa X-Received: by 2002:a17:902:d81:: with SMTP id 1mr53631577plv.323.1563473901966; Thu, 18 Jul 2019 11:18:21 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1563473901; cv=none; d=google.com; s=arc-20160816; b=RNzo7fXOAqPB5veJSQz3pAIcWs5GPzgOSqxtfA3cbvV0eCpewvTEXTUexKTwwP4JS8 6VnNIBpbeWr1MCpxtvUA1yK9hMjWDMPw8nCkEtWb+tNMw/Esthf0fJd0+BrGrjgm2PMn dll0zZ8we5T5wAYwwxuSN0HGVOS9JNVct2QXvAzl/PdM47cJzTOXb+7xKa4rXnDp7xP7 yjCXMhCnGJIBL3E7sMxIcTVkILfKUjGgeEuWNu9Glt4Xb0wyepWB9G+Jv+rlITICyH9Z 7kKGREm+eDkpwVCM6Cj3VUvvDe8DAz4kNLriUEP7pH7OMV9wdAAzONeK+yw51E4DMR4W 0QBA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:user-agent:references :message-id:in-reply-to:subject:cc:to:from:date; bh=mqG3Tf0y7yOyHKZqvYJ95GMbdXMNEQLXG6JECReuMWI=; b=bSYpttPOLQPRJ3LpbWADjkG/gU2tNxlUPHa/FDTG/nDu90gymWGSnDqicEWgcKv1QE RV99jJyEZpTXDpCSvY7vcSUmURf+7lsBL1HOmm4U4bTVPkLROWlJ0IbYzdJfizlTL4m2 2go12RigM7gYaxneal4fpB2s7CsA24MYlexyYABaiIBurBBIyZnZJez/hgFZ1jUiNEVp EhE5Q17l7qfEQmm9tzGxq97IEGtXtu+IhKMmqTnY7Pt9/3GqbywxN0oI+yHlHpcbbww4 Eq0JoUraaPhwVQK0sbdfvpoDmP+dd00WdS+mYVc2Pr8TubXeJmKx0QLXVPURlGdHK02j /WSw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id t5si24549297plr.124.2019.07.18.11.18.06; Thu, 18 Jul 2019 11:18:21 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390890AbfGRSRZ (ORCPT + 99 others); Thu, 18 Jul 2019 14:17:25 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:58371 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726649AbfGRSRZ (ORCPT ); Thu, 18 Jul 2019 14:17:25 -0400 Received: from pd9ef1cb8.dip0.t-ipconnect.de ([217.239.28.184] helo=nanos) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1hoAxt-000184-4o; Thu, 18 Jul 2019 20:17:13 +0200 Date: Thu, 18 Jul 2019 20:17:12 +0200 (CEST) From: Thomas Gleixner To: Peter Zijlstra cc: luferry , Rik van Riel , Greg Kroah-Hartman , Josh Poimboeuf , linux-kernel@vger.kernel.org Subject: Re: Re: [PATCH v2] smp: avoid generic_exec_single cause system lockup In-Reply-To: <20190718160601.GP3402@hirez.programming.kicks-ass.net> Message-ID: References: <20190718080308.48381-1-luferry@163.com> <5f5fbd7.1073c.16c0446ea63.Coremail.luferry@163.com> <20190718160601.GP3402@hirez.programming.kicks-ass.net> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 18 Jul 2019, Peter Zijlstra wrote: > On Thu, Jul 18, 2019 at 11:58:47AM +0200, Thomas Gleixner wrote: > > As we discussed on IRC, it is worse, we can only use these functions > from task/process context. We need something like the below. Indeed that's better defined. Thanks, tglx