From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261464AbULXXwV (ORCPT ); Fri, 24 Dec 2004 18:52:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261465AbULXXwV (ORCPT ); Fri, 24 Dec 2004 18:52:21 -0500 Received: from holomorphy.com ([207.189.100.168]:6593 "EHLO holomorphy.com") by vger.kernel.org with ESMTP id S261464AbULXXwQ (ORCPT ); Fri, 24 Dec 2004 18:52:16 -0500 Date: Fri, 24 Dec 2004 15:52:05 -0800 From: William Lee Irwin III To: "David S. Miller" Cc: Andrea Arcangeli , linux-kernel@vger.kernel.org, tglx@linutronix.de, akpm@osdl.org Subject: Re: VM fixes [4/4] Message-ID: <20041224235205.GX771@holomorphy.com> References: <20041224174156.GE13747@dualathlon.random> <20041224100147.32ad4268.davem@davemloft.net> <20041224182219.GH13747@dualathlon.random> <20041224125504.4caa4270.davem@davemloft.net> <20041224212513.GV771@holomorphy.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20041224212513.GV771@holomorphy.com> Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.6+20040722i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 24 Dec 2004 19:22:19 +0100 Andrea Arcangeli wrote: >>> If those old cpus really supported smp in linux, then fixing this bit is >>> trivial, just change it to short. Do they support short at least? On Fri, Dec 24, 2004 at 12:55:04PM -0800, David S. Miller wrote: >> No, they do not. The smallest atomic unit is one 32-bit word. >> And yes there are SMP systems using these chips. On Fri, Dec 24, 2004 at 01:25:13PM -0800, William Lee Irwin III wrote: > Would systems described as ev56 by /proc/cpuinfo have such chips? I had this one in particular in mind: # cat /proc/cpuinfo cpu : Alpha cpu model : EV56 cpu variation : 7 cpu revision : 0 cpu serial number : system type : Rawhide system variation : Tincup system revision : 0 system serial number : NI93009695 cycle frequency [Hz] : 532819266 est. timer frequency [Hz] : 1200.00 page size [bytes] : 8192 phys. address bits : 40 max. addr. space # : 127 BogoMIPS : 910.04 kernel unaligned acc : 29 (pc=fffffc00003158a8,va=fffffc004dafbd51) user unaligned acc : 0 (pc=0,va=0) platform string : AlphaServer 1200 5/533 4MB cpus detected : 2 cpus active : 2 cpu active mask : 0000000000000003 L1 Icache : 8K, 1-way, 32b line L1 Dcache : 8K, 1-way, 32b line L2 cache : 96K, 3-way, 64b line L3 cache : 4096K, 1-way, 64b line # -- wli