From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755743Ab2FYTE7 (ORCPT ); Mon, 25 Jun 2012 15:04:59 -0400 Received: from mail-pz0-f46.google.com ([209.85.210.46]:43875 "EHLO mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754409Ab2FYTE6 (ORCPT ); Mon, 25 Jun 2012 15:04:58 -0400 Message-ID: <4FE8B656.4080201@gmail.com> Date: Mon, 25 Jun 2012 13:04:54 -0600 From: David Ahern User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:13.0) Gecko/20120614 Thunderbird/13.0.1 MIME-Version: 1.0 To: Namhyung Kim CC: linux-kernel@vger.kernel.org, psuriset@linux.vnet.ibm.com, Arnaldo Carvalho de Melo , Ingo Molnar , Jiri Olsa , Frederic Weisbecker , Peter Zijlstra Subject: Re: [PATCH] perf kvm: fix segfault with default guest arguments References: <1340599286-89757-1-git-send-email-dsahern@gmail.com> <877guvwzt1.fsf@sejong.aot.lge.com> <4FE85EB6.80908@gmail.com> In-Reply-To: <4FE85EB6.80908@gmail.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 On 6/25/12 6:51 AM, David Ahern wrote: > On 6/25/12 2:39 AM, Namhyung Kim wrote >> >> I don't know about the kvm, but isn't there a possibility that the same >> thing happends on other types of event too - i.e. comm, fork, exit..? > > COMM, FORK, EXIT events cannot be generated in the guest of a guest; > host machine is always non-NULL. s/guest of a guest/context of a guest/ [That's I what get for rushing an email as I run out the door this morning.]