Re: [Xen-devel] x86 swiotlb questions

[Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>]

On Fri, Dec 22, 2006 at 04:20:28PM +0000, Jan Beulich wrote:
> One more thing: Is it really necessary to restrict dma_alloc_coherent() to 
> dma_bits?
> I.e., couldn't we, once the bit-level page allocator is merged, use the real 
> bit width
> needed for the requesting device here? If not, this would then permit using 
> the

Yes I think that should work.  If the width is less than what the
hypervisor supports it'll simply fail which is better than returning
the wrong memory silently.

Cheers,
-- 
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