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    SubjectRe: Bug: Discontigmem virt_to_page() [Alpha,ARM,Mips64?]
    On Mon, May 06, 2002 at 01:54:52AM +0200, Daniel Phillips wrote:
    > I must be guilty of not explaining clearly. Suppose you have the following
    > physical memory map:
    >
    > 0: 128 MB
    > 8000,0000: 128 MB
    > 1,0000,0000: 128 MB
    > 1,8000,0000: 128 MB
    > 2,0000,0000: 128 MB
    > 2,8000,0000: 128 MB
    > 3,0000,0000: 128 MB
    > 3,8000,0000: 128 MB
    >
    > The total is 1 GB of installed ram. Yet the kernel's 1G virtual space,
    > can only handle 128 MB of it.

    I see no problem with the above with the existing discontigmem stuff.
    discontigmem does *not* require a linear relationship between kernel
    virtual and physical memory. I've been running kernels for a while
    on such systems.

    Which was the reason for my comment at the start of this thread:
    | On ARM, however, we have cherry to add here. __va() may alias certain
    | physical memory addresses to the same virtual memory address, which
    | makes:

    --
    Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux
    http://www.arm.linux.org.uk/personal/aboutme.html

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