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Date:      Sun, 19 Dec 1999 18:54:38 -0500 (EST)
From:      "Alexander N. Kabaev" <kabaev@mail.ru>
To:        freebsd-hackers@freebsd.org
Subject:   Page attribute table (PAT) support?
Message-ID:  <XFMail.991219185438.kabaev@mail.ru>

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Are there plans to add support for PAT on Intel P6 and AMD Athlon processors?
This feature provides more flexible interface allowing to setup various memory
cache modes on a page-by-page bases. It is much easier to program than MTRRs
and does not suffer from their size/alignment limitations. Provided there
are patches to support PAT in kernel, how it should be exposed to the user
level code? Will something like mmprotect system call suffice?

-Alex


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