From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761720AbYETR4k (ORCPT ); Tue, 20 May 2008 13:56:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755615AbYETR4c (ORCPT ); Tue, 20 May 2008 13:56:32 -0400 Received: from [198.99.130.12] ([198.99.130.12]:41614 "EHLO saraswathi.solana.com" rhost-flags-FAIL-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1753852AbYETR4b (ORCPT ); Tue, 20 May 2008 13:56:31 -0400 Date: Tue, 20 May 2008 13:56:24 -0400 From: Jeff Dike To: Tom Spink Cc: LKML Subject: Re: UML fails to locate address space Message-ID: <20080520175624.GA10889@c2.user-mode-linux.org> References: <7b9198260805200408k1d6b70a8xc7e4c24106e5020f@mail.gmail.com> <20080520135238.GB6990@c2.user-mode-linux.org> <7b9198260805200659p6ed28403t9b0b0ea995f158d5@mail.gmail.com> <20080520161047.GA9598@c2.user-mode-linux.org> <7b9198260805200943x6fb15512o7ba35a40d006b215@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7b9198260805200943x6fb15512o7ba35a40d006b215@mail.gmail.com> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, May 20, 2008 at 05:43:17PM +0100, Tom Spink wrote: > I suspected this type of foul-play, and tried altering bottom to 1, > but this didn't work. So, I took out the page_ok test, and it > continued booting. So I went back, put the test back in and > incremented bottom until I got to 16. It worked at 16. :-) Heh, I guess they were also worried about up to 64K offsets off a NULL pointer too. > Is this something that can be fixed, or would a config option be > appropriate? This was done in order to remove config options. It might be reasonable to effectively do what you did, and search for the lowest address at which mmap works and start from there. > I am willing to blame Ubuntu, but unfortunately, I can't find an > online resource of their patches. https://wiki.ubuntu.com/KernelGitGuide lists a bunch of git repos. Tell me which one applies to you and I'll take a look. Jeff -- Work email - jdike at linux dot intel dot com