Re: [Xen-devel] x86 swiotlb questions

[Keir Fraser <keir@xxxxxxxxxxxxx>]

On 3/1/07 07:10, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

>> Here's a thought: if the highmem DMA requests come from *only* the blkdev
>> subsystem, then perhaps we could use its highmem bounce buffer (I think that
>> still exists?).
> 
> Another, only partially related thought: The addition of KM_SWIOTLB is the
> only
> difference to native kmap_types.h. It would seem to me that, at the price of
> disabling interrupts around the use, it should be possible to replace that
> with
> KM_BOUNCE_READ and let go of the Xen specific header...

Sounds reasonable, although KM_BOUNCE_READ is a misnomer (since we write to
the kmap as well as read from it).

 -- Keir


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