Hi Shimoda-san,

thanks for working on this!

> Please refer to the end of this email about the performance.

Yes, nice improvements, great!

> (I beleive if the performance is improved, the CPU load is also increased.)

I do wonder about this a bit, though. IPMMU and DMA shouldn't be that
much expensive for the CPU, or? Am I overlooking something?

Kind regards,

   Wolfram