Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753892Ab1FOIxS (ORCPT ); Wed, 15 Jun 2011 04:53:18 -0400 Received: from mx1.redhat.com ([209.132.183.28]:1296 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752905Ab1FOIxQ (ORCPT ); Wed, 15 Jun 2011 04:53:16 -0400 Message-ID: <4DF872E8.7000604@redhat.com> Date: Wed, 15 Jun 2011 11:52:56 +0300 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110428 Fedora/3.1.10-1.fc15 Lightning/1.0b3pre Thunderbird/3.1.10 MIME-Version: 1.0 To: "Luck, Tony" CC: Borislav Petkov , Ingo Molnar , "linux-kernel@vger.kernel.org" , "Huang, Ying" , Hidetoshi Seto Subject: Re: [PATCH 08/10] NOTIFIER: Take over TIF_MCE_NOTIFY and implement task return notifier References: <4df13a522720782e51@agluck-desktop.sc.intel.com> <4df13cea27302b7ccf@agluck-desktop.sc.intel.com> <20110612223840.GA23218@aftab> <4DF5C36A.1040707@redhat.com> <20110613095521.GA26316@aftab> <4DF5F729.4060609@redhat.com> <20110613124003.GA27918@aftab> <4DF606C9.90308@redhat.com> <20110613151208.GA29045@aftab> <4DF63B7A.1030805@redhat.com> <4DF748C2.10009@redhat.com> <987664A83D2D224EAE907B061CE93D5301E7280DBF@orsmsx505.amr.corp.intel.com> In-Reply-To: <987664A83D2D224EAE907B061CE93D5301E7280DBF@orsmsx505.amr.corp.intel.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1134 Lines: 26 On 06/14/2011 07:59 PM, Luck, Tony wrote: > >I don't think that doing anything to the task is correct, though, as the > >problem is with the page, not the task itself. In fact if the task is > >executing a vgather instruction, or if another thread munmap()s the > >page, it may not hit the same page again when re-executed. > > True the memory is the source of the problem - but the task is > intimately affected. Time for a car analogy :-) ... > > You are driving along the road when you notice a giant hole. You > hit the brakes and stop on the very edge. The problem is with the > road, not with your car. But I don't think you want to start driving > again (at least not in the forward direction!) > No argument, the current task has to be preempted. But a complete solution needs to prevent other tasks as well. -- error compiling committee.c: too many arguments to function -- 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/