Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754441AbZJRISX (ORCPT ); Sun, 18 Oct 2009 04:18:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752913AbZJRISV (ORCPT ); Sun, 18 Oct 2009 04:18:21 -0400 Received: from claw.goop.org ([74.207.240.146]:42326 "EHLO claw.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754305AbZJRISP (ORCPT ); Sun, 18 Oct 2009 04:18:15 -0400 Message-ID: <4ADACF48.9020907@goop.org> Date: Sun, 18 Oct 2009 17:18:16 +0900 From: Jeremy Fitzhardinge User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.4pre) Gecko/20090922 Fedora/3.0-2.7.b4.fc11 Lightning/1.0pre Thunderbird/3.0b4 MIME-Version: 1.0 To: Avi Kivity CC: Jeremy Fitzhardinge , Linux Kernel Mailing List , Xen-devel , kurt.hackel@oracle.com, Glauber de Oliveira Costa , the arch/x86 maintainers , Chris Mason Subject: Re: [GIT PULL RFC] pvclock cleanups and pvclock vsyscall support References: <1255548516-15260-1-git-send-email-jeremy.fitzhardinge@citrix.com> <4AD6C679.3000001@redhat.com> <4AD77C21.2050506@goop.org> <4ADAB8F4.6090502@redhat.com> In-Reply-To: <4ADAB8F4.6090502@redhat.com> X-Enigmail-Version: 0.97a Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 942 Lines: 25 On 10/18/09 15:43, Avi Kivity wrote: > On 10/16/2009 04:46 AM, Jeremy Fitzhardinge wrote: >> Care to cook up a patch to implement the kvm bits to make sure it all >> works OK for you? >> > > I've started to do that, but it occurs to me that we're missing out on > NUMA placement by forcing all clocks to be on the same page. OTOH, if > the clocks are heavily used, they'll stay in cache, and if not, who > cares. > Yes, I'd say so. I'd expect the data to be very close to read-only, so the lines should be shared pretty efficiently. On the other hand, there's nothing to stop us from moving to multiple pages in future (either to support NUMA placement, or just more than 64 cpus). J -- 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/