Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751708AbWAKRpF (ORCPT ); Wed, 11 Jan 2006 12:45:05 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751714AbWAKRpF (ORCPT ); Wed, 11 Jan 2006 12:45:05 -0500 Received: from ms-smtp-04.rdc-kc.rr.com ([24.94.166.116]:26084 "EHLO ms-smtp-04.rdc-kc.rr.com") by vger.kernel.org with ESMTP id S1751708AbWAKRpD (ORCPT ); Wed, 11 Jan 2006 12:45:03 -0500 Date: Wed, 11 Jan 2006 11:44:58 -0600 From: Greg Norris To: Mark Lord Cc: linux-kernel@vger.kernel.org Subject: Re: [PATCH ] VMSPLIT config options (with default config fixed) Message-ID: <20060111174458.GA6128@yggdrasil.localdomain> Mail-Followup-To: Mark Lord , linux-kernel@vger.kernel.org References: <20060110143931.GM3389@suse.de> <43C3E9C2.1000309@rtr.ca> <20060110173217.GU3389@suse.de> <43C3F0CA.10205@rtr.ca> <43C403BA.1050106@pobox.com> <43C40803.2000106@rtr.ca> <20060111160050.GA5472@yggdrasil.localdomain> <43C53CA2.7070002@rtr.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <43C53CA2.7070002@rtr.ca> X-Operating-System: Linux yggdrasil 2.6.15 #1 SMP PREEMPT Tue Jan 10 20:27:55 CST 2006 i686 GNU/Linux User-Agent: Mutt/1.5.11 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 758 Lines: 16 On Wed, Jan 11, 2006 at 12:13:06PM -0500, Mark Lord wrote: > Greg Norris wrote: > >Is there any benefit/point to enabling HIGHMEM when using this patch, > >assuming that physical memory is smaller than the address space? For > >example, when using VMSPLIT_3G_OPT on a box with 1G of memory. > > No. In fact, there should be a (very) tiny performance gain > by NOT enabling HIGHMEM -- things like kmap() should get simpler. That's essentially what I thought, but it's nice to have some verification. Thanx! - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/