Re: dynamic DMA-buf sharing between devices

[Christian KÃnig]

On top of those I have 6 more patches in the pipeline to enable VRAM P2P 
with DMA-buf.

So that is not the end of the patch set :)

Christian.

Am 17.04.19 um 15:52 schrieb Chunming Zhou:
> Thanks Christian, great job. I will verify it this week when I finish my
> current work on hand.
>
> -David
>
> å 2019/4/17 2:38, Christian KÃnig wrote:
> > Hi everybody,
> >
> > core idea in this patch set is that DMA-buf importers can now provide an optional invalidate callback. Using this callback and the reservation object exporters can now avoid pinning DMA-buf memory for a long time while sharing it between devices.
> >
> > I've already send out an older version roughly a year ago, but didn't had time to further look into cleaning this up.
> >
> > The last time a major problem was that we would had to fix up all drivers implementing DMA-buf at once.
> >
> > Now I avoid this by allowing mappings to be cached in the DMA-buf attachment and so driver can optionally move over to the new interface one by one.
> >
> > This is also a prerequisite to my patchset enabling sharing of device memory with DMA-buf.
> >
> > Please review and/or comment,
> > Christian.
> >
> >
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