From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3E1C9257.2040907@us.ibm.com> Date: Wed, 08 Jan 2003 13:04:23 -0800 From: Dave Hansen MIME-Version: 1.0 Subject: Re: [RFC][PATCH] allow bigger PAGE_OFFSET with PAE References: <3E1B334E.8030807@us.ibm.com> <20030107233713.GB23814@holomorphy.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: William Lee Irwin III Cc: Linux Kernel Mailing List , linux-mm@kvack.org List-ID: William Lee Irwin III wrote: > On Tue, Jan 07, 2003 at 12:06:38PM -0800, Dave Hansen wrote: > >>Also, this gets the kernel's pagetables right, but neglects >>userspace's for now. pgd_alloc() needs to be fixed to allocate >>another PMD, if the split isn't PMD-alighed. > > Um, that should be automatic when USER_PTRS_PER_PGD is increased. Nope, you need a little bit more. pgd_alloc() relies on its memcpy() to provide the kernel mappings. After the last user PMD is allocated, you still need to copy the kernel-shared part of it in. -- Dave Hansen haveblue@us.ibm.com -- 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/