From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752778AbZLVV6z (ORCPT ); Tue, 22 Dec 2009 16:58:55 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752135AbZLVV6y (ORCPT ); Tue, 22 Dec 2009 16:58:54 -0500 Received: from smtp1.linux-foundation.org ([140.211.169.13]:33801 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751669AbZLVV6y (ORCPT ); Tue, 22 Dec 2009 16:58:54 -0500 Date: Tue, 22 Dec 2009 13:58:09 -0800 From: Andrew Morton To: Oleg Nesterov Cc: Alexey Dobriyan , Andi Kleen , Ananth Mavinakayanahalli , Christoph Hellwig , "Frank Ch. Eigler" , Ingo Molnar , Peter Zijlstra , Roland McGrath , linux-kernel@vger.kernel.org, utrace-devel@redhat.com Subject: Re: [PATCH 0/7] utrace/ptrace Message-Id: <20091222135809.1ab10869.akpm@linux-foundation.org> In-Reply-To: <20091218011116.GA29534@redhat.com> References: <20091218011116.GA29534@redhat.com> X-Mailer: Sylpheed 2.4.8 (GTK+ 2.12.9; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 18 Dec 2009 02:11:16 +0100 Oleg Nesterov wrote: > Hello. > > This is the new iteration of Roland's utrace patch, this time > with "rewrite-ptrace-via-utrace" + cleanups in utrace core. > So... should we merge this? I'll confess that I've rather forgotten why we might want this. > It allows for multiple separate tracing engines to work > in parallel without interfering with each other. Higher-level tracing > facilities can be implemented as loadable kernel modules using this layer. That's a bit brief. Do you have a nicer sales brochure? What are these "separate tracing engines" and what is their merge status and why would we want any of them, for what purpose? etc. IOW: give us a reason!