BPF Timers Support Set To Finally Appear With Linux 5.15

[phoronix]

Phoronix: BPF Timers Support Set To Finally Appear With Linux 5.15

The latest BPF functionality set to appear with Linux 5.15 this autumn is timers support...

https://www.phoronix.com/scan.php?page=news_item&px=BPF-Timers-For-Linux-5.15

[flower]

when i try to look far in the future i imagine a kernel consisting of drivers and a bpf interpreter in rust and everything else just being bpf scripts.

what do you think? would that be a good?

[ssokolow]

when i try to look far in the future i imagine a kernel consisting of drivers and a bpf interpreter in rust and everything else just being bpf scripts.

what do you think? would that be a good?

Probably has the same problem as a pure microkernel... great in theory, but not good enough performance.

[Brane215]

when i try to look far in the future i imagine a kernel consisting of drivers and a bpf interpreter in rust and everything else just being bpf scripts.
what do you think? would that be a good?

Don't think so. I don't like BPF, admittedly form my limited insight into it.
I think there is a case to have native code there and that will prevail in the end, despite all concerns.

BTW, why couldn't compiler's intermediate code be used there instead of BPF ?

[Developer12]

Giving high precision timers to in-kernel BPF programs.

Not going to lie, if I were someone especially concerned about side-channels, I'd be plenty worried about this.