Re: [rfc] generic allocator and mspec driver

David Mosberger
2005-02-16T21:02:04Z

>>>>> On 16 Feb 2005 14:10:56 -0500, Jes Sorensen <jes@wildopensource.com> said:

Jes> Hmmm for some reason I had the impression PG_arch_1 was only
Jes> used on PPC/PPC64 for icache current status, but it looks like
Jes> you're right. Darn ;-(

Jes> Can't we just drop swiotlb and tell people to buy real
Jes> hardware? ;-)))

The use of PG_arch_1 has nothing to do with swiotlb. It lets us
optimize away expensive cache-flushing by taking advantage of the fact
that DMA transactions automatically establish coherency.

--david