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SubjectRe: [PATCH] perf/core: Emit PERF_RECORD_LOST for pinned events
On Mon, Jan 18, 2021 at 12:43:23PM +0900, Namhyung Kim wrote:
> As of now we silently ignore pinned events when it's failed to be
> scheduled and make it error state not try to schedule it again.
> That means we won't get any samples for the event.
>
> But there's no way for users to notice and respond to it. Let's
> emit a lost event with a new misc bit to indicate this situation.

Users should get a read(2) error IIRC, does that not work?

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