Re: [BUG] perf_event: when events are grouped, the time enabled / running values are incorrect

[Peter Zijlstra]

On Tue, 2010-05-11 at 21:55 +0200, stephane eranian wrote:
> Events are also grouped in this example. Both this same issue exists
> also when only
> one event is used. I suspect an update_event_times() or
> update_group_times() is also
> missing on the sampling path in perf_overflow_handler().

Hrmm, you're right, except fixing that is non-trivial.
update_event_times() wants to be called with ctx->lock held and we can't
do that from NMI context.

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