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    SubjectRE: Calculating kernel logical address ..
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    So, what you gurus suggest me to do? How can I get physical address of a
    user buffer (which was originally mmap'ed() from a kmalloc() allocation) and
    which would also be protable across multiple platforms?

    Thanks.
    Imran.


    -----Original Message-----
    From: David S. Miller [mailto:davem@redhat.com]
    Sent: Sunday, September 08, 2002 10:28 PM
    To: phillips@arcor.de
    Cc: imran.badr@cavium.com; linux-kernel@vger.kernel.org
    Subject: Re: Calculating kernel logical address ..


    From: Daniel Phillips <phillips@arcor.de>
    Date: Mon, 9 Sep 2002 07:17:30 +0200

    On Monday 09 September 2002 07:00, David S. Miller wrote:
    > Actually, KSEG0 the most Linux friendly design in the world
    > particularly in 64-bit mode.

    That's easy to say until you try and work with it (I assume you have,
    and forgot). Just try to do a 3G/1G split on it, for example.

    Maybe you missed the "64-bit mode" part of what I said. :-)

    In 64-bit mode there is no need to do any kind of split.
    You just use the KSEG mapping with full cache coherency for
    all of physical memory as the PAGE_OFFSET area.

    I forget if it was KSEG0 or some other number, but I know it
    works.



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