From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933580AbaE3QFc (ORCPT ); Fri, 30 May 2014 12:05:32 -0400 Received: from mga02.intel.com ([134.134.136.20]:37333 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932378AbaE3QFJ (ORCPT ); Fri, 30 May 2014 12:05:09 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.98,941,1392192000"; d="scan'208";a="548985023" Date: Fri, 30 May 2014 09:03:57 -0700 From: Andi Kleen To: Peter Zijlstra Cc: Andi Kleen , gleb@kernel.org, pbonzini@redhat.com, eranian@google.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/4] perf: Allow guest PEBS for KVM owned counters Message-ID: <20140530160357.GB8876@tassilo.jf.intel.com> References: <1401412327-14810-1-git-send-email-andi@firstfloor.org> <1401412327-14810-3-git-send-email-andi@firstfloor.org> <20140530073153.GA20167@laptop.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140530073153.GA20167@laptop.programming.kicks-ass.net> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 30, 2014 at 09:31:53AM +0200, Peter Zijlstra wrote: > On Thu, May 29, 2014 at 06:12:05PM -0700, Andi Kleen wrote: > > From: Andi Kleen > > > > Currently perf unconditionally disables PEBS for guest. > > > > Now that we have the infrastructure in place to handle > > it we can allow it for KVM owned guest events. For > > the perf needs to know that a event is owned by > > a guest. Add a new state bit in the perf_event for that. > > > > This doesn't make sense; why does it need to be owned? Please read the complete patch kit -Andi -- ak@linux.intel.com -- Speaking for myself only