[RFC] Experimental DMA-BUF Device Heaps

[Simon Ser]

On Thursday, August 20, 2020 10:15 AM, Ezequiel Garcia <ezequiel at collabora.com> wrote:

> > I'm rather interested on where this goes, as I was toying with using
> > some sort of heap ID as a basis for a "device-local" constraint in the
> > memory constraints proposals Simon and I will be discussing at XDC this
> > year. It would be rather elegant if there was one type of heap ID used
> > universally throughout the kernel that could provide a unique handle for
> > the shared system memory heap(s), as well as accelerator-local heaps on
> > fancy NICs, GPUs, NN accelerators, capture devices, etc. so apps could
> > negotiate a location among themselves. This patch seems to be a step
> > towards that in a way, but I agree it would be counterproductive if a
> > bunch of devices that were using the same underlying system memory ended
> > up each getting their own heap ID just because they used some SW
> > framework that worked that way.
> > Would appreciate it if you could send along a pointer to your BoF if it
> > happens!
>
> Here is it:
>
> https://linuxplumbersconf.org/event/7/contributions/818/
>
> It would be great to see you there and discuss this,
> given I was hoping we could talk about how to meet a
> userspace allocator library expectations as well.

Unfortunately there's no livestream for BoFs. Would be very interested
in having a summary of the discussions once the BoF is over!