From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936731AbXGRXux (ORCPT ); Wed, 18 Jul 2007 19:50:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755642AbXGRXum (ORCPT ); Wed, 18 Jul 2007 19:50:42 -0400 Received: from ns.suse.de ([195.135.220.2]:59582 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752188AbXGRXul (ORCPT ); Wed, 18 Jul 2007 19:50:41 -0400 Date: Thu, 19 Jul 2007 01:50:35 +0200 From: Andrea Arcangeli To: Rene Herman Cc: William Lee Irwin III , Dave Hansen , linux-kernel@vger.kernel.org, Dave Kleikamp Subject: Re: RFC: CONFIG_PAGE_SHIFT (aka software PAGE_SIZE) Message-ID: <20070718235035.GB29728@v2.random> 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> <469E410C.50302@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <469E410C.50302@gmail.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 18, 2007 at 06:34:20PM +0200, Rene Herman wrote: > It says that highmem is not an issue due to no such thing as highmem even > existing on the machines with support for larger hard pagesizes, but this > wouldn't hold for soft pages. Sort of went "damn" in an x86 context upon > reading that. Correct, but I'm not really sure if it worth worrying about x86 missing this, furthermore it would still be possible to enable it on the very x86 low end (with regular 4k page size) that may worry to use up to the last byte of ram as cache for tiny files. To me using kmalloc for this looks quite ideal. Thanks.