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Re: [RFC][PATCH] allow bigger PAGE_OFFSET with PAE

To: William Lee Irwin III <wli@holomorphy.com>
Subject: Re: [RFC][PATCH] allow bigger PAGE_OFFSET with PAE
From: Dave Hansen <haveblue@us.ibm.com>
Date: Wed, 08 Jan 2003 13:04:23 -0800
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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

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Follow-Ups:
- Re: [RFC][PATCH] allow bigger PAGE_OFFSET with PAE
  - From: William Lee Irwin III <wli@holomorphy.com>

References:
- [RFC][PATCH] allow bigger PAGE_OFFSET with PAE
  - From: Dave Hansen <haveblue@us.ibm.com>
- Re: [RFC][PATCH] allow bigger PAGE_OFFSET with PAE
  - From: William Lee Irwin III <wli@holomorphy.com>

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