From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <38CCEADF.A6DE223A@ife.ee.ethz.ch>
Date: Mon, 13 Mar 2000 14:19:27 +0100
From: Thomas Sailer <sailer@ife.ee.ethz.ch>
MIME-Version: 1.0
Subject: Re: remap_page_range problem on 2.3.x
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Sender: owner-linux-mm@kvack.org
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To: Andy Henroid <andy_henroid@yahoo.com>
Cc: Jeff Garzik <jgarzik@mandrakesoft.com>, Linux-MM@kvack.org
List-ID: <linux-mm.kvack.org>

Andy Henroid wrote:

> Yes, the remap_page_range is done indirectly
> through mmap call to the /dev/mem driver.

I think I saw this too some time ago.

I tried to duplicate the kernel's view of the
address space above 0xc0000000 at an offset in
a usermode program. I ended up being able to
read the correct data from /dev/mem, but reading
from an mmaped page from /dev/mem returned completely
bogus data (all zero).

My code is in usb.in.tum.de, module usbstress,
files uhcidump.c and kmem*

Tom
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