Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755104Ab0ARMYY (ORCPT ); Mon, 18 Jan 2010 07:24:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754680Ab0ARMYX (ORCPT ); Mon, 18 Jan 2010 07:24:23 -0500 Received: from mail-fx0-f225.google.com ([209.85.220.225]:53082 "EHLO mail-fx0-f225.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754667Ab0ARMYW convert rfc822-to-8bit (ORCPT ); Mon, 18 Jan 2010 07:24:22 -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=STyXeQBcP8uzJUXdwd8InD7MwzKv/3FO9mQUpcVE4cSiESsygVlg+W0LURon1FM8LV /69zKSGmGoGNWSzHByN7OfxRYEZ2C4O/I2bHIt+m59eQzuqxfcTDD1MWO+WLIdYuld6a tEBIhm+PSPryBlIQHL6ywNSORGbI2Tl2uJRb4= MIME-Version: 1.0 In-Reply-To: <4B545146.3080001@redhat.com> References: <20100111122521.22050.3654.sendpatchset@srikar.in.ibm.com> <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> <4B545146.3080001@redhat.com> Date: Mon, 18 Jan 2010 14:24:19 +0200 X-Google-Sender-Auth: ac671167500e78b2 Message-ID: <84144f021001180424h54ce7970ra7dda2ff8a3be277@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: 701 Lines: 15 On 01/18/2010 02:13 PM, Pekka Enberg wrote: >> So how big chunks of the address space are we talking here for uprobes? On Mon, Jan 18, 2010 at 2:17 PM, Avi Kivity wrote: > 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. Yup, it's 32-bit that I worry about. -- 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/