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    SubjectRe: Word-at-a-time dcache name accesses
    Date
    "H. Peter Anvin" <hpa@zytor.com> writes:

    > On 03/02/2012 03:46 PM, Linus Torvalds wrote:
    >>
    >> Comments?
    >>
    >
    > My biggest concern is what happens when this happens to be at the end of
    > mapped kernel memory and we overrun the page?

    A long time ago (AMD K7ish) we had hardware bugs to work around in
    this area. Overlapping into some PCI hole MMIO areas could cause obscure
    hangs. That is why I was always careful to not do that in any x86
    library code.

    -Andi

    --
    ak@linux.intel.com -- Speaking for myself only


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