Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757067Ab0AOLF7 (ORCPT ); Fri, 15 Jan 2010 06:05:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753394Ab0AOLF7 (ORCPT ); Fri, 15 Jan 2010 06:05:59 -0500 Received: from e4.ny.us.ibm.com ([32.97.182.144]:55595 "EHLO e4.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752950Ab0AOLF6 (ORCPT ); Fri, 15 Jan 2010 06:05:58 -0500 Date: Fri, 15 Jan 2010 16:35:47 +0530 From: Maneesh Soni To: Peter Zijlstra Cc: Srikar Dronamraju , Jim Keniston , Ingo Molnar , Arnaldo Carvalho de Melo , Ananth N Mavinakayanahalli , utrace-devel , Mark Wielaard , Frederic Weisbecker , Masami Hiramatsu , LKML Subject: Re: [RFC] [PATCH 4/7] Uprobes Implementation Message-ID: <20100115110547.GB3660@in.ibm.com> Reply-To: maneesh@in.ibm.com References: <20100111122521.22050.3654.sendpatchset@srikar.in.ibm.com> <20100111122553.22050.46895.sendpatchset@srikar.in.ibm.com> <1263467394.4244.291.camel@laptop> <1263509380.4875.35.camel@localhost.localdomain> <1263546632.4244.352.camel@laptop> <20100115102645.GA22640@linux.vnet.ibm.com> <1263551607.4244.379.camel@laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1263551607.4244.379.camel@laptop> User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jan 15, 2010 at 11:33:27AM +0100, Peter Zijlstra wrote: > On Fri, 2010-01-15 at 15:56 +0530, Srikar Dronamraju wrote: > > Hi Peter, > > > > Or there could be two threads that could be racing to > > insert/delete a breakpoint. These synchronization issues are all handled > > by the Uprobes layer. > > Shouldn't be hard to put that in the ubp layer, right? > > > Uprobes layer would need to be notified of process life-time events > > like fork/clone/exec/exit. > > No so much the process lifetimes as the vma life times are interesting, > placing a hook in the vm code to track that isn't too hard, > I think similar hooks were given thumbs down in the previous incarnation of uprobes (which was implemented without utrace). http://lkml.indiana.edu/hypermail/linux/kernel/0603.2/1254.html Thanks Maneesh -- Maneesh Soni Linux Technology Center IBM India Systems and Technology Lab, Bangalore, India. -- 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/