From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261487AbULYEkW (ORCPT ); Fri, 24 Dec 2004 23:40:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261489AbULYEkW (ORCPT ); Fri, 24 Dec 2004 23:40:22 -0500 Received: from havoc.gtf.org ([63.115.148.101]:21974 "EHLO havoc.gtf.org") by vger.kernel.org with ESMTP id S261487AbULYEkS (ORCPT ); Fri, 24 Dec 2004 23:40:18 -0500 Date: Fri, 24 Dec 2004 23:40:14 -0500 From: Jeff Garzik To: Andrea Arcangeli Cc: "David S. Miller" , linux-kernel@vger.kernel.org, tglx@linutronix.de, akpm@osdl.org Subject: Re: VM fixes [1/4] Message-ID: <20041225044013.GA25088@havoc.gtf.org> References: <20041224173519.GB13747@dualathlon.random> <20041224100016.530a004c.davem@davemloft.net> <20041224182031.GG13747@dualathlon.random> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20041224182031.GG13747@dualathlon.random> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Dec 24, 2004 at 07:20:31PM +0100, Andrea Arcangeli wrote: > On Fri, Dec 24, 2004 at 10:00:16AM -0800, David S. Miller wrote: > > On Fri, 24 Dec 2004 18:35:19 +0100 > > Andrea Arcangeli wrote: > > > > > I made used_math a char at the light of later patches. per-cpu atomicity > > > with byte granularity is provided by all archs AFIK. > > > > Older Alpha's need to read-modify-write a word to implement > > byte ops. > > Yep, I remeber this was the case in some old alpha. But did they support > smp too? I can't see how that old hardware could support smp. If they're > UP they're fine. Sure... there were older Alpha SMP boxes without the BWX and CIX extensions. Jeff