From: William Lee Irwin III <wli@holomorphy.com>
To: Dave Hansen <haveblue@us.ibm.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org
Subject: Re: [RFC][PATCH] allow bigger PAGE_OFFSET with PAE
Date: Wed, 8 Jan 2003 14:05:33 -0800 [thread overview]
Message-ID: <20030108220533.GD23814@holomorphy.com> (raw)
In-Reply-To: <3E1C9257.2040907@us.ibm.com>
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.
William Lee Irwin III wrote:
>> Um, that should be automatic when USER_PTRS_PER_PGD is increased.
On Wed, Jan 08, 2003 at 01:04:23PM -0800, Dave Hansen wrote:
> 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.
See the bit about rounding up. Then again, the pmd entries don't get
filled in by any of that...
Bill
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next prev parent reply other threads:[~2003-01-08 22:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-07 20:06 Dave Hansen
2003-01-07 23:37 ` William Lee Irwin III
2003-01-08 21:04 ` Dave Hansen
2003-01-08 22:05 ` William Lee Irwin III [this message]
2003-01-08 22:44 ` William Lee Irwin III
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