Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754854AbYHSX66 (ORCPT ); Tue, 19 Aug 2008 19:58:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753302AbYHSX6t (ORCPT ); Tue, 19 Aug 2008 19:58:49 -0400 Received: from gw.goop.org ([64.81.55.164]:49619 "EHLO mail.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753292AbYHSX6t (ORCPT ); Tue, 19 Aug 2008 19:58:49 -0400 Message-ID: <48AB5E36.8030400@goop.org> Date: Tue, 19 Aug 2008 16:58:46 -0700 From: Jeremy Fitzhardinge User-Agent: Thunderbird 2.0.0.16 (X11/20080723) MIME-Version: 1.0 To: benh@kernel.crashing.org CC: Mathieu Desnoyers , Steven Rostedt , Scott Wood , Eran Liberty , linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org, Steven Rostedt , "Paul E. McKenney" , Nick Piggin Subject: Re: ftrace introduces instability into kernel 2.6.27(-rc2,-rc3) References: <48A9901B.1080900@redhat.com> <20080818154746.GA26835@Krystal> <48A9AFA7.8080508@freescale.com> <1219110814.8062.2.camel@pasglop> <1219113549.8062.13.camel@pasglop> <20080819024707.GA22659@Krystal> <20080819173453.GA28239@Krystal> <1219182471.7826.16.camel@pasglop> In-Reply-To: <1219182471.7826.16.camel@pasglop> X-Enigmail-Version: 0.95.7 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 691 Lines: 22 Benjamin Herrenschmidt wrote: >> Ok, there are two cases where it's ok : >> >> 1 - in stop_machine, considering we are not touching code executed in >> NMI handlers. >> 2 - when using my replace_instruction_safe() which uses a temporary >> breakpoint when doing the instruction replacement. >> >> In those cases you could use text_poke_early(). >> > > Note that vmap/vunmap will be very slow. > Don't we have Nick's speedups now? J -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/