Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932331AbVLAQzw (ORCPT ); Thu, 1 Dec 2005 11:55:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932336AbVLAQzw (ORCPT ); Thu, 1 Dec 2005 11:55:52 -0500 Received: from fsmlabs.com ([168.103.115.128]:49036 "EHLO spamalot.fsmlabs.com") by vger.kernel.org with ESMTP id S932333AbVLAQzv (ORCPT ); Thu, 1 Dec 2005 11:55:51 -0500 X-ASG-Debug-ID: 1133456149-23768-13-0 X-Barracuda-URL: http://10.0.1.244:8000/cgi-bin/mark.cgi Date: Thu, 1 Dec 2005 09:01:29 -0800 (PST) From: Zwane Mwaikambo To: Andi Kleen cc: discuss@x86-64.org, linux-kernel@vger.kernel.org X-ASG-Orig-Subj: Re: Enabling RDPMC in user space by default Subject: Re: Enabling RDPMC in user space by default In-Reply-To: <20051201130518.GD19515@wotan.suse.de> Message-ID: References: <20051129151515.GG19515@wotan.suse.de> <20051130033808.GJ19515@wotan.suse.de> <20051201130518.GD19515@wotan.suse.de> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Barracuda-Spam-Score: 0.00 X-Barracuda-Spam-Status: No, SCORE=0.00 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=5.0 KILL_LEVEL=5.0 tests= X-Barracuda-Spam-Report: Code version 3.02, rules version 3.0.5757 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1011 Lines: 20 On Thu, 1 Dec 2005, Andi Kleen wrote: > > I agree that the NMI watchdog is very important, but my main objection is > > trying to provide a stable interface for this, i would rather see a > > seperate tool do it (as cumbersome as it may be) even if it meant that > > the external tool simply did what you intend on doing in the kernel. > > But why an external tool when the nmi watchdog needs this anyways? We'll probably have the NMI watchdog ticking at a lower frequency anyway and isn't always enabled. Although i recall you want NMI watchdog on by default too on i386 (which i don't have a problem with). The reason for the external tool is because that allows more flexibility for profiling tools, that is more PMCs can be used if needed by the user. - 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/