zlacker

I'm guessing it's Tim Roscoe's keynote on how most fundamental questions about what the hardware is actually doing are invisible to traditional OS abstractions:

https://www.youtube.com/watch?v=36myc8wQhLo

Roscoe's talk is fairly long (the video is > 1h), but the basic thesis was taken up in a segment of Bryan Cantrill's 20 min OSFF talk:

https://www.youtube.com/watch?v=XbBzSSvT_P0

Both talks are very good; I recommend watching both, in either order.

>>chalst+(OP)
Yes, it was Tim Roscoe's one.