From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754483AbXKNBgz (ORCPT ); Tue, 13 Nov 2007 20:36:55 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757220AbXKNBgp (ORCPT ); Tue, 13 Nov 2007 20:36:45 -0500 Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:60434 "EHLO sunset.davemloft.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752921AbXKNBgo (ORCPT ); Tue, 13 Nov 2007 20:36:44 -0500 Date: Tue, 13 Nov 2007 17:36:43 -0800 (PST) Message-Id: <20071113.173643.78069123.davem@davemloft.net> To: clameter@sgi.com Cc: akpm@linux-foundation.org, linux-mm@vger.kernel.org, linux-kernel@vger.kernel.org, dada1@cosmosbay.com, schwidefsky@de.ibm.com Subject: Re: [patch 01/28] cpu alloc: The allocator From: David Miller In-Reply-To: References: <20071106195157.878563669@sgi.com> <20071113.031510.151440585.davem@davemloft.net> X-Mailer: Mew version 5.2 on Emacs 22.1 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: Christoph Lameter Date: Tue, 13 Nov 2007 14:20:02 -0800 (PST) > On Tue, 13 Nov 2007, David Miller wrote: > > > Yes, I could add virtualized area support to sparc64, but we cannot > > impose this on every platform. > > Other platforms do not have the 8MB restriction nor do they have so many > processors. sparc32 has the same limitations, nobody is going to implement the virt stuff there. > Here is the draft of a virtual cpu area implementation for sparc64. Uses > the VMEMMAP chunks: This doesn't avoid the core problem. Bloating up the BSS like that is bad, end enforcing a virt implementation to avoid that is an anti-social way to go about implementing this feature.