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xen-devel
Re: [Xen-devel] x86 swiotlb questions
On 19/12/06 12:48, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:
>> Do we merge okay with lib/swiotlb.c then?
>
> Not yet - because of the highmem handling needed for i386. I wonder, however,
> how native Linux gets away with not handling this through swiotlb, and why
> nevertheless Xen needs to special case this. Any ideas?
Probably because GFP_KERNEL and GFP_DMA allocations are guaranteed to be
DMAable by 30-bit-capable devices on native, but not on Xen.
-- Keir
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