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
next prev parent reply other threads:[~2003-01-08 21:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-07 20:06 [RFC][PATCH] allow bigger PAGE_OFFSET with PAE 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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