From: Andy Henroid <andy_henroid@yahoo.com>
To: Thomas Sailer <sailer@ife.ee.ethz.ch>
Cc: Jeff Garzik <jgarzik@mandrakesoft.com>, Linux-MM@kvack.org
Subject: Re: remap_page_range problem on 2.3.x
Date: Mon, 13 Mar 2000 11:16:59 -0800 (PST) [thread overview]
Message-ID: <20000313191659.6976.qmail@web1306.mail.yahoo.com> (raw)
--- Thomas Sailer <sailer@ife.ee.ethz.ch> wrote:
> 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).
Yes, the read through /dev/mem work for me too.
It looks like remap_page_range is doing the right
thing and it certainly works for other remapping.
I wonder what the problem is?
Oh well, low priority compared to the other things
that need to get fixed as we move into pre2.4
Thanks,
Andy
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next reply other threads:[~2000-03-13 19:16 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-03-13 19:16 Andy Henroid [this message]
-- strict thread matches above, loose matches on Subject: below --
2000-03-09 17:51 Andy Henroid
2000-03-13 13:19 ` Thomas Sailer
2000-03-08 2:05 Andy Henroid
2000-03-08 4:04 ` Jeff Garzik
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