On Wed, 2002-08-14 at 00:22, Imran Badr wrote:
> How can I define a certain region of memory so that it is never cached? I
> want to use non-cached region of memory to communicate to my PCI device to
> avoid system overhead in cache snooping.
Architecture specific and for RAM quite often not supported at all. You
can use ioremap_nocache on ram in theory but that doesn't actually work
on most processors, will MCE on the PPro and needs some work on Athlon
XP/MP
K6/K5 don't support it at all from memory.
If your hardware is sane it will already be doing cache line size bursts
and MWI.
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This archive was generated by hypermail 2b29 : Thu Aug 15 2002 - 22:00:35 EST