Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267841AbUIVENK (ORCPT ); Wed, 22 Sep 2004 00:13:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267850AbUIVENJ (ORCPT ); Wed, 22 Sep 2004 00:13:09 -0400 Received: from peabody.ximian.com ([130.57.169.10]:33924 "EHLO peabody.ximian.com") by vger.kernel.org with ESMTP id S267841AbUIVENH (ORCPT ); Wed, 22 Sep 2004 00:13:07 -0400 Subject: Re: Does ZONE_HIGHMEM exist on machines with 1G memeory From: Robert Love To: Ronghua Zhang Cc: linux-kernel@vger.kernel.org In-Reply-To: References: Content-Type: text/plain Date: Wed, 22 Sep 2004 00:13:07 -0400 Message-Id: <1095826387.2454.101.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 1.5.94.1 (1.5.94.1-1) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 633 Lines: 18 On Tue, 2004-09-21 at 23:09 -0400, Ronghua Zhang wrote: > This may be a dumb question. But it seems to me that when the machine > has 1GB memory, it can be mapped to the 1GB kernel virtual address space. > Do we still need ZONE_HIGHMEM in this case? Please CC any follow-up to me. > Thanks Highmem is actually everything above 896MB ... so, yes, you need ZONE_HIGHMEM. Robert Love - 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/