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    SubjectRe: ioremap_nocache problem?
    ** Reply to message from David Wragg <dpw@doc.ic.ac.uk> on 24 Jan 2001 00:50:20
    +0000


    > (x86 processors with PAT and IA64 can set write-combining through page
    > flags. x86 processors with MTRRs but not PAT would need a more
    > elaborate implementation for write-combining.)

    What is PAT? I desperately need to figure out how to turn on write combining
    on a per-page level. I thought I had to use MTRRs, but now you're saying I can
    use this "PAT" thing instead. Please explain!


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