From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753809AbYHPUMf (ORCPT ); Sat, 16 Aug 2008 16:12:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751347AbYHPUM1 (ORCPT ); Sat, 16 Aug 2008 16:12:27 -0400 Received: from qb-out-0506.google.com ([72.14.204.231]:28165 "EHLO qb-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751282AbYHPUM0 (ORCPT ); Sat, 16 Aug 2008 16:12:26 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=qzktk03joKnUlL2gprnQcIrOKyByUcrDNZ75YvcATlhB/1MisVr1yyjhvR8IYRQ3yp AGnUfECe4W8PcD/Fpcf8UP9EVNwA7R8kQ4DGSJEcCDIWQ+7tdOHnFlixvXQztaC3IJPO W9BTnTPEmcGLr8RdLm7dXM1uK+Et+E3cs4tQ4= Date: Sun, 17 Aug 2008 00:12:35 +0400 From: Cyrill Gorcunov To: Arjan van de Ven Cc: "Maciej W. Rozycki" , mingo@elte.hu, hpa@zytor.com, tglx@linutronix.de, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/6] x86: apic - unify lapic_resume Message-ID: <20080816201235.GB7182@lenovo> References: <1218914515-26377-1-git-send-email-gorcunov@gmail.com> <722b5bc0303212ca203cadeedae5ede3e23eccb7.1218914042.git.gorcunov@gmail.com> <20080816130008.349b031d@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080816130008.349b031d@infradead.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 [Arjan van de Ven - Sat, Aug 16, 2008 at 01:00:08PM -0700] | On Sat, 16 Aug 2008 20:52:07 +0100 (BST) | "Maciej W. Rozycki" wrote: | | > On Sat, 16 Aug 2008, Cyrill Gorcunov wrote: | > | > > +#ifdef CONFIG_X86_64 | > > + if (x2apic) | > > + enable_x2apic(); | > > + else | > > +#endif | > | > Hmm, x86-64 hardware can run a 32-bit kernel, so it might be a good | > idea to take the opportunity of the merge and extend x2APIC support | > to the 32-bit configuration too. It should be mostly a mechanical | > change. Just a suggestion though -- feel free to ignore if you'd | > rather not dive into it. ;) | | it's not like you can/want to go over 128 cpus on a 32 bit kernel | though.. | -- | If you want to reach me at my work email, use arjan@linux.intel.com | For development, discussion and tips for power savings, | visit http://www.lesswatts.org | Arjan, it seems this limit is not APIC related since iirc 82489DX allows to address 2^14 bits, x2APIC - more then 128 entities too. So I suspect it somehow cpu bitmap related. Am I wrong (I didn't _check_ the code)? - Cyrill -