Remember #libobscura ?
The project didn't attract a huge community, but it did teach me stuff so obscure that few people apart from the authors understand it.
So I started writing it down, for everyone's benefit.
If you had questions about #DMABUF, I try to explain it on my #blog :
https://dorotac.eu/posts/DMABUF/
Thanks to all the people who explained it to me. Some parts are really confusing.
(Please report mistakes.)