From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail138.messagelabs.com (mail138.messagelabs.com [216.82.249.35]) by kanga.kvack.org (Postfix) with SMTP id AFA376B003D for ; Fri, 8 May 2009 08:57:57 -0400 (EDT) Date: Fri, 8 May 2009 20:58:21 +0800 From: Wu Fengguang Subject: ftrace: concurrent accesses possible? Message-ID: <20090508125821.GC15949@localhost> References: <20090508105320.316173813@intel.com> <20090508111031.020574236@intel.com> <20090508114742.GB17129@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090508114742.GB17129@elte.hu> Sender: owner-linux-mm@kvack.org To: Ingo Molnar Cc: =?utf-8?B?RnLDqWTDqXJpYw==?= Weisbecker , Steven Rostedt , Peter Zijlstra , Li Zefan , Andrew Morton , LKML , KOSAKI Motohiro , Andi Kleen , Matt Mackall , Alexey Dobriyan , "linux-mm@kvack.org" List-ID: Hello, On Fri, May 08, 2009 at 07:47:42PM +0800, Ingo Molnar wrote: > > So this should be done in cooperation with instrumentation folks, > while improving _all_ of Linux instrumentation in general. Or, if > you dont have the time/interest to work with us on that, it should > not be done at all. Not having the resources/interest to do > something properly is not a license to introduce further > instrumentation crap into Linux. I have a dummy question on /debug/trace: is it possible to - use 2+ tracers concurrently? - run a system script that makes use of a tracer, without disturbing the sysadmin's tracer activities? - access 1 tracer concurrently from many threads, with different filter etc. options? If not currently, will private mounts be a viable solution? Thanks, Fengguang -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org