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SubjectRe: With Daniel Phillips Patch
   From: "Van Maren, Kevin" <>
Date: Wed, 22 Aug 2001 21:22:19 -0500

If the HW generates DAC for addresses < 4GB whenever enabling
support for 64-bit addresses, then that is very broken.

That is what happens.

Please don't complain that I didn't spend hours searching
through the archives looking for a message from months? years? ago
that I didn't know existed.

Weeks, if not days.

> I think for SAC-only devices, it is just dumb wasted space in the
> driver image.

Perhaps. But the question is whether it is simpler/better to have
HIGHMEM x86 kernels (which by definition have memory to spare) waste
a few bytes to provide "sane" interfaces across all platforms. And
whether the kernel bloat for all the additional functions compensates
for it ;-)

The plain fact is that %95 of PCI devices do not support DAC

David S. Miller

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