Facebook/Meta does not have owners, so any two people in the company can land a change.
Any two people are in a less-extreme but similar boat: if someone puts up a bad diff and someone without a stake in the code accepts it, they had better hope to hell nothing goes wrong.
SEV review is a remarkably enlightened process for what it is, but you do not want to sit there explaining to extreme-seniority people why you YOLO'd something into Presto without buy in from a Presto hacker with your manager sitting behind you already thinking about how much this is going to get harped on in calibration.
The `OWNERS` file at FB is in `hg log`, but it's there.
In the bad/fun old days of extremely small on-call loop, a less clear/organized escalation chain, and fairly "roll your own" per-team tooling, once in a blue moon a whole business unit would be down because 10k machines were crash-looping and you just needed `if (NULL == ptr) return;` on like one line to end the carnage. There are exceptions to every rule I suppose.
But in 7 years at FB I think I force slammed someone else as reviewer with merely their verbal approval in the middle of the night 2 or 3 times, and never after like, 2015.
They mail you the shit off your desk for playing games with any of that stuff, and it’s thoroughly, thoroughly checked.
Because it was more disciplined, those commits could be automatically marked for later review.
They finally added a "final review" step to ensure that someone eventually takes a look at these changes after the initial accept, but that still occurs several days after the commit.
Reviewed-by: yourself
in the commit message to skip review? That was my favorite one.