Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 13 Jan 2002 19:04:36 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 13 Jan 2002 19:04:28 -0500 Received: from neon-gw-l3.transmeta.com ([63.209.4.196]:18438 "EHLO neon-gw.transmeta.com") by vger.kernel.org with ESMTP id ; Sun, 13 Jan 2002 19:04:16 -0500 Message-ID: <3C422066.6040000@zytor.com> Date: Sun, 13 Jan 2002 16:03:50 -0800 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.6) Gecko/20011120 X-Accept-Language: en-us, en, sv MIME-Version: 1.0 To: mjustice@austin.rr.com CC: linux-kernel@vger.kernel.org Subject: Re: [PATCH] 1-2-3 GB In-Reply-To: <20020112125625.E1482@inspiron.school.suse.de> <200201132309.g0DN9mma018052@sm13.texas.rr.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Marvin Justice wrote: > On Sunday 13 January 2002 02:24 pm, H. Peter Anvin wrote: > >>By the way, expect user programs to fail due to lack of address space >>if you only give them 1 GB of userspace. At 1 GB of userspace there >>is *no* address space which is compatible with the normal address >>space map available to the user process. >> > Actually, I think it will work for apps < `600MB since the mmap area is > automatically adjusted to begin at PAGE_OFFSET/3. > As I said: At 1 GB of userspace there is *no* address space which is compatible with the normal address space map available to the user process. There is mmap() space, available, sure, but you can't get the same address, even by request. Applications that care about the layout of the address space will fail. -hpa - 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/