Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754985Ab0AONIK (ORCPT ); Fri, 15 Jan 2010 08:08:10 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753810Ab0AONIJ (ORCPT ); Fri, 15 Jan 2010 08:08:09 -0500 Received: from e28smtp01.in.ibm.com ([122.248.162.1]:56121 "EHLO e28smtp01.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751260Ab0AONIG (ORCPT ); Fri, 15 Jan 2010 08:08:06 -0500 Date: Fri, 15 Jan 2010 18:38:02 +0530 From: Srikar Dronamraju To: Peter Zijlstra Cc: Jim Keniston , Ingo Molnar , Arnaldo Carvalho de Melo , Ananth N Mavinakayanahalli , utrace-devel , Mark Wielaard , Frederic Weisbecker , Masami Hiramatsu , Maneesh Soni , LKML Subject: Re: [RFC] [PATCH 4/7] Uprobes Implementation Message-ID: <20100115130802.GC20658@linux.vnet.ibm.com> Reply-To: Srikar Dronamraju 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=iso-8859-1 Content-Disposition: inline In-Reply-To: <1263551607.4244.379.camel@laptop> User-Agent: Mutt/1.5.20 (2009-08-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Peter Zijlstra [2010-01-15 11:33:27]: > > > 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, > > > It also needs to know > > - when a breakpoint is hit > > - stop and resume a thread. > > A simple hook in the trap code is done quickly enough, and no reason to > stop the thread, its not going anywhere when it traps. > > Some of the threads could be executing in the vicinity of the breakpoint when it is getting inserted or deleted. Wont we need to stop/quiesce those threads? -- 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/