Re: With Daniel Phillips Patch

[David S. Miller]

   From: "Van Maren, Kevin" <[e-mail]>
   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
addressing.

Later,
David S. Miller
[e-mail]