Here: https://youtu.be/KXuZi9aeGTw
Jump to the 15-minute mark for the three new system calls, switchto_wait, switchto_resume, switchto_switch.
I think you might be thinking of https://lwn.net/Articles/826860/
Jump to the 15-minute mark for the three new system calls, switchto_wait, switchto_resume, switchto_switch.
Not sure if the system call was accepted or if it still exists as Google specific kernel code. I can't seem to find the original article either...