Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754794Ab0ARMN3 (ORCPT ); Mon, 18 Jan 2010 07:13:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754406Ab0ARMN2 (ORCPT ); Mon, 18 Jan 2010 07:13:28 -0500 Received: from mail-fx0-f225.google.com ([209.85.220.225]:33518 "EHLO mail-fx0-f225.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751441Ab0ARMN1 convert rfc822-to-8bit (ORCPT ); Mon, 18 Jan 2010 07:13:27 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=JSvCGZYZq75yaL9h86HNOCaI+nYMZYlLq0L1Cc5MoFvfXacFB1YC01xNC9i603Crqz iTrdGbfKSz9xjeMrD6PAkdL1YV38hZNtqYPbsf5ZUintSDwXT0e3ecZUfuSsHGrsJRm7 pEcSWSJVsmqjv+5XOrq2aZ604+D4MFqcE9WQo= MIME-Version: 1.0 In-Reply-To: <4B544F8E.1080603@redhat.com> References: <20100111122521.22050.3654.sendpatchset@srikar.in.ibm.com> <4B5325CF.5000001@redhat.com> <1263740593.557.20967.camel@twins> <4B53661A.9090907@redhat.com> <1263800752.4283.19.camel@laptop> <4B543F93.3060509@redhat.com> <1263815072.4283.305.camel@laptop> <4B544D7C.2060708@redhat.com> <1263816396.4283.361.camel@laptop> <4B544F8E.1080603@redhat.com> Date: Mon, 18 Jan 2010 14:13:25 +0200 X-Google-Sender-Auth: 7c5c9fddd76c4d69 Message-ID: <84144f021001180413w76a8ca2axb0b9f07ee4dea67e@mail.gmail.com> Subject: Re: [RFC] [PATCH 1/7] User Space Breakpoint Assistance Layer (UBP) From: Pekka Enberg To: Avi Kivity Cc: Peter Zijlstra , ananth@in.ibm.com, Jim Keniston , Srikar Dronamraju , Ingo Molnar , Arnaldo Carvalho de Melo , utrace-devel , Frederic Weisbecker , Masami Hiramatsu , Maneesh Soni , Mark Wielaard , LKML Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 857 Lines: 20 Hi Avi, On Mon, 2010-01-18 at 14:01 +0200, Avi Kivity wrote: >>> Maybe you place no value on uprobes. ?But people who debug userspace >>> likely will see a reason. On 01/18/2010 02:06 PM, Peter Zijlstra wrote: >> I do see value in uprobes, I just don't like it mucking about with the >> address space. Nor does it appear required. On Mon, Jan 18, 2010 at 2:09 PM, Avi Kivity wrote: > Well, the alternatives are very unappealing. ?Emulation and single-stepping > are going to be very slow compared to a couple of jumps. So how big chunks of the address space are we talking here for uprobes? -- 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/