lkml.org 
[lkml]   [2001]   [Aug]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: With Daniel Phillips Patch
From
   From: "Van Maren, Kevin" <kevin.vanmaren@unisys.com>
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
davem@redhat.com



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:58    [W:0.037 / U:1.088 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site