Re: [Patch v3 3/7] perf/x86: Check if cpuc->events[*] pointer exists before accessing it

[Andi Kleen]

> Andi, I didn't fully get the exact meaning about the "log" here. When
> throttle is triggered, perf_event_throttle() has already called
> perf_log_throttle() to log the throttle event although only for the group
> leader. Is it enough?

Throttle normally doesn't involve data loss, just less samples. But this
is data loss, so it's an overflow.

-Andi