Re: [RFC] /dev/ioasid uAPI proposal

[Christoph Hellwig]

On Mon, Jun 07, 2021 at 11:14:24AM -0300, Jason Gunthorpe wrote:
> "non-coherent DMA" is some general euphemism that evokes images of
> embedded platforms that don't have coherent DMA at all and have low
> cost ways to regain coherence. This is not at all what we are talking
> about here at all.

It literally is the same way of working.  And not just low-end embedded
platforms use this, but a lot of older server platforms did as well.