Re: [rfc] generic allocator and mspec driver

From: David Mosberger <davidm_at_napali.hpl.hp.com>
Date: 2005-02-17 08:02:04
>>>>> 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
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Received on Wed Feb 16 16:02:17 2005

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