Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754894Ab0ARMRy (ORCPT ); Mon, 18 Jan 2010 07:17:54 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754584Ab0ARMRx (ORCPT ); Mon, 18 Jan 2010 07:17:53 -0500 Received: from mx1.redhat.com ([209.132.183.28]:4846 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754575Ab0ARMRw (ORCPT ); Mon, 18 Jan 2010 07:17:52 -0500 Message-ID: <4B545146.3080001@redhat.com> Date: Mon, 18 Jan 2010 14:17:10 +0200 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.5) Gecko/20091209 Fedora/3.0-4.fc12 Thunderbird/3.0 MIME-Version: 1.0 To: Pekka Enberg 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 Subject: Re: [RFC] [PATCH 1/7] User Space Breakpoint Assistance Layer (UBP) 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> <84144f021001180413w76a8ca2axb0b9f07ee4dea67e@mail.gmail.com> In-Reply-To: <84144f021001180413w76a8ca2axb0b9f07ee4dea67e@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 661 Lines: 17 On 01/18/2010 02:13 PM, Pekka Enberg wrote: > So how big chunks of the address space are we talking here for uprobes? > That's for the authors to answer, but at a guess, 32 bytes per probe (largest x86 instruction is 15 bytes), so 32 MB will give you a million probes. That's a piece of cake for x86-64, probably harder to justify for i386. -- error compiling committee.c: too many arguments to function -- 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/