From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: [PATCH V5 1/2] perf ignore LBR and extra_regs Date: Mon, 14 Jul 2014 15:40:11 +0200 Message-ID: <53C3DDBB.2000304@redhat.com> References: <1404989984-3068-1-git-send-email-kan.liang@intel.com> <53C3C517.4000500@redhat.com> <20140714120922.GV9918@twins.programming.kicks-ass.net> <53C3CFC1.9070800@redhat.com> <37D7C6CF3E00A74B8858931C1DB2F077014E1A91@SHSMSX103.ccr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: "andi@firstfloor.org" , "linux-kernel@vger.kernel.org" , "kvm@vger.kernel.org" To: "Liang, Kan" , Peter Zijlstra Return-path: Received: from mx1.redhat.com ([209.132.183.28]:27115 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754360AbaGNNkv (ORCPT ); Mon, 14 Jul 2014 09:40:51 -0400 In-Reply-To: <37D7C6CF3E00A74B8858931C1DB2F077014E1A91@SHSMSX103.ccr.corp.intel.com> Sender: kvm-owner@vger.kernel.org List-ID: Il 14/07/2014 15:36, Liang, Kan ha scritto: >> > Kan Liang, what happens if CONFIG_PARAVIRT=y? Do you get garbage or >> > just no events reported? >> > > Guest rdmsr/wrmsr will eventually call rdmsr_safe/wrmsr_safe. They will handle the #GP. So there is no error report in guest. Yeah, but what's the effect on the output of perf? Paolo