Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756647AbZCaLkz (ORCPT ); Tue, 31 Mar 2009 07:40:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752814AbZCaLkp (ORCPT ); Tue, 31 Mar 2009 07:40:45 -0400 Received: from mx2.redhat.com ([66.187.237.31]:39443 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751874AbZCaLko (ORCPT ); Tue, 31 Mar 2009 07:40:44 -0400 Date: Tue, 31 Mar 2009 07:38:32 -0400 From: "Frank Ch. Eigler" To: Peter Zijlstra Cc: Andrew Morton , Theodore Tso , oleg@redhat.com, adobriyan@gmail.com, mingo@elte.hu, torvalds@linux-foundation.org, roland@redhat.com, rostedt@goodmis.org, utrace-devel@redhat.com, linux-kernel@vger.kernel.org, tglx@linutronix.de, Christoph Hellwig , Jeff Dike Subject: Re: [PATCH 3/3] utrace-based ftrace "process" engine, v2 Message-ID: <20090331113832.GG16170@redhat.com> References: <20090321154501.GA2707@elte.hu> <20090321143413.75ead1aa.akpm@linux-foundation.org> <20090321215145.GB5262@redhat.com> <20090322123749.GF19826@elte.hu> <20090323134813.GA18219@x200.localdomain> <20090323151400.GA3413@redhat.com> <20090323214417.GD5814@mit.edu> <20090330151844.8b4eed0f.akpm@linux-foundation.org> <1238491062.28248.2046.camel@twins> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1238491062.28248.2046.camel@twins> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1013 Lines: 27 Hi - On Tue, Mar 31, 2009 at 11:17:42AM +0200, Peter Zijlstra wrote: > [...] Right, from my POV something like utrace is desirable, since > its basically a huge multiplexer for the debugger state, eventually > allowing us to have multiple debuggers attached to the same process. > [...] Right. > Then there is this little thing called frysk which uses it, no idea > what kind of kernel space that needs, nor where it lives -- or for > that matter, wth it really does ;-) Frysk was to be a first user of such an improved ptrace(2) API in order to do the sort of background / multiply-connected debugging, but that project has been on indefinite hold for about a year. Instead, there are experiments under way to extend gdb's backend for that capability. - FChE -- 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/