Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752861AbaAWURy (ORCPT ); Thu, 23 Jan 2014 15:17:54 -0500 Received: from one.firstfloor.org ([193.170.194.197]:41739 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751939AbaAWURx (ORCPT ); Thu, 23 Jan 2014 15:17:53 -0500 Date: Thu, 23 Jan 2014 21:17:51 +0100 From: Andi Kleen To: Jan Kiszka Cc: Andi Kleen , Huang Ying , Peter Zijlstra , Ingo Molnar , Thomas Gleixner , "H. Peter Anvin" , Linux Kernel Mailing List Subject: Re: x86: Inconsistent xAPIC synchronization in arch_irq_work_raise? Message-ID: <20140123201751.GC20765@two.firstfloor.org> References: <52DE6FCE.2050708@siemens.com> <20140121140113.GL30183@twins.programming.kicks-ass.net> <20140121145105.GE3694@twins.programming.kicks-ass.net> <1390346420.23634.5.camel@yhuang-dev> <20140122184325.GY20765@two.firstfloor.org> <52E164BC.1080302@siemens.com> <20140123192255.GB20765@two.firstfloor.org> <52E172B3.7080605@siemens.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <52E172B3.7080605@siemens.com> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > > It has to be lockless, the machine checks run as NMIs. > > The whole point of the self nmi is to get back to a lockable state. > > "It" is arch_irq_work_raise, or more? Really irq_work_queue, but it boils down to arch_irq_work_raise -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/