From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756353Ab0LHTWD (ORCPT ); Wed, 8 Dec 2010 14:22:03 -0500 Received: from rcsinet10.oracle.com ([148.87.113.121]:60645 "EHLO rcsinet10.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755390Ab0LHTWB (ORCPT ); Wed, 8 Dec 2010 14:22:01 -0500 Message-ID: <4CFFDA7C.5050303@kernel.org> Date: Wed, 08 Dec 2010 11:20:28 -0800 From: Yinghai Lu User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.15) Gecko/20101026 SUSE/3.0.10 Thunderbird/3.0.10 MIME-Version: 1.0 To: Peter Zijlstra CC: Don Zickus , "Eric W. Biederman" , Vivek Goyal , Ingo Molnar , Jason Wessel , "linux-kernel@vger.kernel.org" , Haren Myneni Subject: Re: perf hw in kexeced kernel broken in tip References: <1291232292.32004.1969.camel@laptop> <20101201194644.GD2511@redhat.com> <1291232989.32004.1987.camel@laptop> <20101201195835.GE2511@redhat.com> <1291234036.32004.2008.camel@laptop> <20101202052321.GH18100@redhat.com> <1291275270.4023.20.camel@twins> <20101202161502.GL18100@redhat.com> <1291764620.2032.1293.camel@laptop> <20101208140103.GM21786@redhat.com> <1291818005.28378.38.camel@laptop> <1291820356.28378.83.camel@laptop> <4CFFD1C2.1080108@kernel.org> <1291835196.28378.145.camel@laptop> In-Reply-To: <1291835196.28378.145.camel@laptop> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/08/2010 11:06 AM, Peter Zijlstra wrote: >> then still can use perf etc after we kexec from RHEL or SLES kernel to >> later kernel ( from 2.6.37) > > I'm not sure why people would do that, but yeah I guess we can do > something like that. more problem: system with linuxbios and have kernel in flash as bootloader. they may kexec to final production kernel. and they may need to update that embedded kernel to shutdown perf.... Yinghai