From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758074AbYG2Rea (ORCPT ); Tue, 29 Jul 2008 13:34:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752817AbYG2ReW (ORCPT ); Tue, 29 Jul 2008 13:34:22 -0400 Received: from netops-testserver-3-out.sgi.com ([192.48.171.28]:33124 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752703AbYG2ReW (ORCPT ); Tue, 29 Jul 2008 13:34:22 -0400 Date: Tue, 29 Jul 2008 12:34:20 -0500 From: Cliff Wickman To: Jeremy Fitzhardinge Cc: Nick Piggin , steiner@sgi.com, mingo@elte.hu, linux-kernel@vger.kernel.org Subject: Re: Comments on UV tlb flushing Message-ID: <20080729173420.GA18296@sgi.com> References: <488E644B.10801@goop.org> <200807291412.18495.nickpiggin@yahoo.com.au> <20080729133204.GA13138@sgi.com> <488F2C9B.9070306@goop.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <488F2C9B.9070306@goop.org> User-Agent: Mutt/1.5.17+20080114 (2008-01-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 29, 2008 at 07:43:39AM -0700, Jeremy Fitzhardinge wrote: > Cliff Wickman wrote: >> I think that the Linux distributions are not going to build a special >> UV kernel, are they? So every distro would have to be prompted to >> turn on CONFIG_X86_UV, or else their kernel is not going to boot on UV. >> > > Distros will generally turn on everything. You could have it on by > default if the kernel is built for CONFIG_X86_GENERICARCH which enables > support for other big numa configurations. I think distros generally > build with that enabled anyway. > > J I don't know much about x86 configuration options. It looks like CONFIG_X86_GENERICARCH is fairly new, so I don't know where to look for samples of how it will be set by RH and SuSE. But if the tlb_uv.o code should be present in "every" distro x86 kernel I don't see the point of having to configure it in. Why not just configure it out for small (embedded) kernels? -Cliff -- Cliff Wickman Silicon Graphics, Inc. cpw@sgi.com (651) 683-3824