Re: [PATCH 1/2] perf/bpf: Allow a bpf program to suppress I/O signals.

[Namhyung Kim]

On Tue, Dec 5, 2023 at 10:17 AM Marco Elver <elver@xxxxxxxxxx> wrote:
>
> On Tue, 5 Dec 2023 at 19:07, Namhyung Kim <namhyung@xxxxxxxxxx> wrote:
> > If we want to handle returning 0 from bpf as if the event didn't
> > happen, I think SIGTRAP and event_limit logic should be done
> > after the overflow handler depending on pending_kill or something.
>
> I'm not sure which kernel version this is for, but in recent kernels,
> the SIGTRAP logic was changed to no longer "abuse" event_limit, and
> uses its own "pending_sigtrap" + "pending_work" (on reschedule
> transitions).

Oh, I didn't mean SIGTRAP and event_limit together.
Maybe they have an issue separately.

Thanks,
Namhyung