From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754055Ab3KUMt3 (ORCPT ); Thu, 21 Nov 2013 07:49:29 -0500 Received: from cdptpa-outbound-snat.email.rr.com ([107.14.166.226]:44637 "EHLO cdptpa-oedge-vip.email.rr.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751491Ab3KUMt2 (ORCPT ); Thu, 21 Nov 2013 07:49:28 -0500 Date: Thu, 21 Nov 2013 07:49:26 -0500 From: Steven Rostedt To: "H. Peter Anvin" Cc: Andi Kleen , x86@kernel.org, linux-kernel@vger.kernel.org, Andi Kleen , Ingo Molnar , Thomas Gleixner Subject: Re: [PATCH] Add a text_poke syscall Message-ID: <20131121124926.GB8044@home.goodmis.org> References: <1384820855-27790-1-git-send-email-andi@firstfloor.org> <528AF5D7.7000308@zytor.com> <20131119184959.GE29695@two.firstfloor.org> <528CE65B.6020300@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <528CE65B.6020300@zytor.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-RR-Connecting-IP: 107.14.168.118:25 X-Cloudmark-Score: 0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Nov 20, 2013 at 08:42:03AM -0800, H. Peter Anvin wrote: > We're talking user space here, which has different requirement (COW, > memory protection, ...) which means it is not really the same code. You > can't take a page fault while patching the kernel. Well, technically you can take a page fault while patching the kernel. It happens all the time when patching modules (vmalloc'd). But I get your point. You don't have to worry about COW or being paged out. "page fault" is just too general of a term. And yes, I'm being anal ;-) -- Steve