From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934728Ab0CPKlc (ORCPT ); Tue, 16 Mar 2010 06:41:32 -0400 Received: from mx1.redhat.com ([209.132.183.28]:7304 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932139Ab0CPKla (ORCPT ); Tue, 16 Mar 2010 06:41:30 -0400 Message-ID: <4B9F603B.4080004@redhat.com> Date: Tue, 16 Mar 2010 12:40:59 +0200 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.8) Gecko/20100301 Fedora/3.0.3-1.fc12 Thunderbird/3.0.3 MIME-Version: 1.0 To: Ingo Molnar CC: "Zhang, Yanmin" , Peter Zijlstra , Sheng Yang , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Marcelo Tosatti , oerg Roedel , Jes Sorensen , Gleb Natapov , Zachary Amsden , ziteng.huang@intel.com Subject: Re: [PATCH] Enhance perf to collect KVM guest os statistics from host side References: <1268717232.2813.36.camel@localhost> <4B9F19F7.6000309@redhat.com> <20100316072449.GB11881@elte.hu> <4B9F4D74.4090403@redhat.com> <20100316095336.GI7961@elte.hu> <4B9F59DE.1060008@redhat.com> <20100316102052.GC10069@elte.hu> In-Reply-To: <20100316102052.GC10069@elte.hu> 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 03/16/2010 12:20 PM, Ingo Molnar wrote: >>>> >>>> The symbol server's client can certainly access the bits through vmchannel. >>>> >>> Ok, that would work i suspect. >>> >>> Would be nice to have the symbol server in tools/perf/ and also make it easy >>> to add it to the initrd via a .config switch or so. >>> >>> That would have basically all of the advantages of being built into the kernel >>> (availability, configurability, transparency, hackability), while having all >>> the advantages of a user-space approach as well (flexibility, extensibility, >>> robustness, ease of maintenance, etc.). >>> >> Note, I am not advocating building the vmchannel client into the host >> kernel. [...] >> > Neither am i. What i suggested was a user-space binary/executable built in > tools/perf and put into the initrd. > I'm confused - initrd seems to be guest-side. I was talking about the host side. For the guest, placing the symbol server in tools/ is reasonable. -- error compiling committee.c: too many arguments to function