From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933930AbXGYRy0 (ORCPT ); Wed, 25 Jul 2007 13:54:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755064AbXGYRyT (ORCPT ); Wed, 25 Jul 2007 13:54:19 -0400 Received: from holomorphy.com ([66.93.40.71]:50724 "EHLO holomorphy.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752597AbXGYRyT (ORCPT ); Wed, 25 Jul 2007 13:54:19 -0400 Date: Wed, 25 Jul 2007 10:56:06 -0700 From: William Lee Irwin III To: Andrea Arcangeli Cc: Dave Hansen , linux-kernel@vger.kernel.org Subject: Re: RFC: CONFIG_PAGE_SHIFT (aka software PAGE_SIZE) Message-ID: <20070725175606.GP11781@holomorphy.com> References: <20070706222651.GG5777@v2.random> <1183764801.10287.233.camel@localhost> <20070706235228.GL5777@v2.random> <20070717174737.GM6909@holomorphy.com> <20070717193308.GD25301@v2.random> <20070718133222.GM11781@holomorphy.com> <20070724194418.GH19559@v2.random> <20070725032011.GN6909@holomorphy.com> <20070725143904.GI19559@v2.random> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070725143904.GI19559@v2.random> Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 25, 2007 at 04:39:04PM +0200, Andrea Arcangeli wrote: > For the kernel stack btw, when alloc_pages(order=1) fails vmalloc > should be used and 4k stacks can be dropped. Nobody does dma from the > stack anymore these days IIRC (it doesn't work in all archs anyway). I have recent code for that circulating, albeit intended for debugging purposes. There's nothing particularly debug-oriented about it, though, apart from the fact a guard page is automatically set up by vmalloc() and that the use of vmalloc() is unconditional. As for the rest, I'm sure there could be a lively conversation, but consensus, so I'll let it go. -- wli