Re: 32-bit dma allocations on 64-bit platforms

From: David Mosberger (davidm_at_napali.hpl.hp.com)
Date: 06/29/04

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    Date:	Mon, 28 Jun 2004 23:13:12 -0700
To: arjanv@redhat.com

    >>>>> On Sat, 26 Jun 2004 09:16:27 +0200, Arjan van de Ven <arjanv@redhat.com> said:

      Arjan> the real solution is an iommu of course, but the highmem
      Arjan> solution has quite some merit too..... I know you disagree
      Arjan> with me on that one though.

    Yes, some merits and some faults. The real solution is iommu or
    64-bit capable devices. Interesting that graphics controllers should
    be last to get 64-bit DMA capability, considering how much more
    complex they are than disk controllers or NICs.

            --david
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  • Next message: Hugh Dickins: "Re: [system crash] [swaps] make the filesystem inaccessible and all applications that try to access it hangs"