Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752461Ab0ARNF2 (ORCPT ); Mon, 18 Jan 2010 08:05:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751244Ab0ARNF1 (ORCPT ); Mon, 18 Jan 2010 08:05:27 -0500 Received: from bombadil.infradead.org ([18.85.46.34]:45235 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750780Ab0ARNF1 (ORCPT ); Mon, 18 Jan 2010 08:05:27 -0500 Subject: Re: [RFC] [PATCH 1/7] User Space Breakpoint Assistance Layer (UBP) From: Peter Zijlstra To: Avi Kivity Cc: Pekka Enberg , Srikar Dronamraju , ananth@in.ibm.com, Jim Keniston , Ingo Molnar , Arnaldo Carvalho de Melo , utrace-devel , Frederic Weisbecker , Masami Hiramatsu , Maneesh Soni , Mark Wielaard , LKML In-Reply-To: <4B5459CA.9060603@redhat.com> References: <1263740593.557.20967.camel@twins> <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> <20100118124419.GC1628@linux.vnet.ibm.com> <84144f021001180451k2a84f17x3dc24796fea986c9@mail.gmail.com> <4B5459CA.9060603@redhat.com> Content-Type: text/plain; charset="UTF-8" Date: Mon, 18 Jan 2010 14:05:10 +0100 Message-ID: <1263819910.4283.478.camel@laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.28.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 770 Lines: 18 On Mon, 2010-01-18 at 14:53 +0200, Avi Kivity wrote: > On 01/18/2010 02:51 PM, Pekka Enberg wrote: > > > > And how many probes do we expected to be live at the same time in > > real-world scenarios? I guess Avi's "one million" is more than enough? > > > > I don't think a user will ever come close to a million, but we can > expect some inflation from inlined functions (I don't know if uprobes > replicates such probes, but if it doesn't, it should). That's up to the userspace creating the probes but yes, agreed. -- 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/