From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932374AbWGKDCF (ORCPT ); Mon, 10 Jul 2006 23:02:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932378AbWGKDCF (ORCPT ); Mon, 10 Jul 2006 23:02:05 -0400 Received: from ug-out-1314.google.com ([66.249.92.169]:1991 "EHLO ug-out-1314.google.com") by vger.kernel.org with ESMTP id S932374AbWGKDCE (ORCPT ); Mon, 10 Jul 2006 23:02:04 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=akphvvyWIWJkGO23zGIdvAEBf+qo6boyf0qklea4fx2KWgzAZmgH0aHk7KnKZtIlL1P2/muzwM1oTprfI9nedLnkHV3LL7LHfqRlLzjLkQ7qCsbaJMfqBvG3x08NjzPqN9EEU4GxGN8Or+hfkgMdXhJg2bVtP1o2JqXHYUT87VQ= Message-ID: Date: Mon, 10 Jul 2006 21:01:53 -0600 From: "David Mosberger-Tang" To: "Jeremy Higdon" Subject: Re: [PATCH] ia64: change usermode HZ to 250 Cc: "Arjan van de Ven" , "Jes Sorensen" , "Alan Cox" , "Luck, Tony" , "John Daiker" , "John Hawkes" , "Tony Luck" , "Andrew Morton" , linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, "Jack Steiner" , "Dan Higgins" In-Reply-To: <20060710202228.GA732959@sgi.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <617E1C2C70743745A92448908E030B2A27FC5F@scsmsx411.amr.corp.intel.com> <1151578928.23785.0.camel@localhost.localdomain> <44A3AFFB.2000203@sgi.com> <1151578513.3122.22.camel@laptopd505.fenrus.org> <20060708001427.GA723842@sgi.com> <1152340963.3120.0.camel@laptopd505.fenrus.org> <20060710202228.GA732959@sgi.com> X-Google-Sender-Auth: 3db5ec7f3fd8c4f1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On 7/10/06, Jeremy Higdon wrote: > On Sat, Jul 08, 2006 at 07:07:14AM -0600, David Mosberger-Tang wrote: > > Nothing is broken. Read Alan's statement carefully... > > > > --david > > His statement can be read a couple of ways. Alan said: -------------------------------------------------------------- From: Alan Cox Date: 2006-06-29 21:02:08 Ar Iau, 2006-06-29 am 05:37 -0400, ysgrifennodd Jes Sorensen: > You have my vote for that one. Anything else is just going to cause > those broken userapps to continue doing the wrong thing. We should > really do this on all archs though. No need, all current mainstream architectures expose a constant user HZ. Alan -------------------------------------------------------------- Note that Alan didn't claim that *all* (Linux-supported) architectures expose a constant user HZ, only the "mainstream" ones. I won't get into the debate as to what qualifies as "mainstream", but clearly IA64 does not (and should not) expose a constant value, since there were no legacy-binary-issue and we chose to insist that apps should uses sysconf() or equivalent if they need to know the clocktick. --david -- Mosberger Consulting LLC, http://www.mosberger-consulting.com/