Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755982AbWKVRAU (ORCPT ); Wed, 22 Nov 2006 12:00:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755485AbWKVRAU (ORCPT ); Wed, 22 Nov 2006 12:00:20 -0500 Received: from e3.ny.us.ibm.com ([32.97.182.143]:34466 "EHLO e3.ny.us.ibm.com") by vger.kernel.org with ESMTP id S1755983AbWKVRAT (ORCPT ); Wed, 22 Nov 2006 12:00:19 -0500 Date: Wed, 22 Nov 2006 09:01:31 -0800 From: "Paul E. McKenney" To: Alan Stern Cc: "Paul E. McKenney" , Oleg Nesterov , Kernel development list Subject: Re: [patch] cpufreq: mark cpufreq_tsc() as core_initcall_sync Message-ID: <20061122170131.GC1755@us.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20061121230314.GH2013@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1221 Lines: 28 On Tue, Nov 21, 2006 at 09:17:59PM -0500, Alan Stern wrote: > On Tue, 21 Nov 2006, Paul E. McKenney wrote: > > > > Things may not be quite as bad as they appear. On many architectures the > > > store-mb-load pattern will work as expected. (In fact, I don't know which > > > architectures it might fail on.) > > > > Several weak-memory-ordering CPUs. :-/ > > Of the CPUs supported by Linux, do you know which ones will work with > store-mb-load and which ones won't? I have partial lists at this point. I confess to not having made much progress porting my memory-barrier torture tests to the relevant architectures over the past few weeks (handling the lack of synchronized lightweight fine-grained timers being the current obstacle), but will let people know once I have gotten the tests working on the machines that I have access to. I don't have access to SMP Alpha or ARM machines (or UP either, for that matter), so won't be able to test those. Thanx, Paul - 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/