From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755488AbZB1Xdl (ORCPT ); Sat, 28 Feb 2009 18:33:41 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751367AbZB1Xdd (ORCPT ); Sat, 28 Feb 2009 18:33:33 -0500 Received: from one.firstfloor.org ([213.235.205.2]:34636 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751085AbZB1Xdc (ORCPT ); Sat, 28 Feb 2009 18:33:32 -0500 Date: Sun, 1 Mar 2009 00:52:01 +0100 From: Andi Kleen To: Pavel Machek Cc: Andi Kleen , linux-kernel@vger.kernel.org Subject: Re: [PATCH 4/6] ftrace, x86: make kernel text writable only for conversions Message-ID: <20090228235201.GE26292@one.firstfloor.org> References: <20090220011316.379904625@goodmis.org> <20090220011521.003556651@goodmis.org> <87y6vyuzsn.fsf@basil.nowhere.org> <20090227210856.GB1476@ucw.cz> <20090228165624.GC26292@one.firstfloor.org> <20090228220829.GE21230@elf.ucw.cz> <87wsba1a9f.fsf@basil.nowhere.org> <20090228221944.GG21230@elf.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090228221944.GG21230@elf.ucw.cz> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > So using aliases for kernel text rewriting is bad idea because it > would break ia64? Nope. First what you do on x86 kernels doesn't matter to ia64. And then kernel text rewriting doesn't require any illegal aliases anyways. It would only be a problem if someone set the kernel text uncached, which no sane person would do. > That was what the thread was about. (Sorry, no ia64 > or sparc manuals nearby). google knows them all. -Andi -- ak@linux.intel.com -- Speaking for myself only.