From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 27 Feb 2003 14:11:51 -0800 From: William Lee Irwin III Subject: Re: Top 128MB of virtual address space Message-ID: <20030227221151.GA24172@holomorphy.com> References: <3E5E8832.688AE0CB@watson.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3E5E8832.688AE0CB@watson.ibm.com> Sender: owner-linux-mm@kvack.org Return-Path: To: "Raymond B. Jennings III" Cc: linux-mm@kvack.org List-ID: On Thu, Feb 27, 2003 at 04:50:42PM -0500, Raymond B. Jennings III wrote: > For linux running on an Intel machine without PAE, the top 128MB of > virtual address space: > If > PKMAP_BASE = FE000000 > and > FIXADDR_START=FFF55000 > That leaves a 32MB area. I believe the permanent highmem mappings are > 1024 pages so that leaves 28MB of address space. What is this space > used for if anything? Nothing. This is fixed in 2.5 -- wli -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: aart@kvack.org