Re: pmu::read() called erroneously in v4.13-rc{3,4}

From	Jiri Olsa <jolsa@redhat.com>
Newsgroups	linux.kernel
Subject	Re: pmu::read() called erroneously in v4.13-rc{3,4}
Date	2017-08-21 16:50 +0200
Message-ID	<ugWbF-5BL-29@gated-at.bofh.it> (permalink)
References	<ucZB8-fd-37@gated-at.bofh.it> <udg8W-2Q4-13@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Fri, Aug 11, 2017 at 12:18:07PM +0100, Mark Rutland wrote:

SNIP

> 
> I'm also confused by perf_output_read_group() when event == leader.
> AFAICT, in that case we won't read() the event at all, and we'll only
> read() the siblings. Is that right?

I think we assume perf_output_read_group is only called from event's
PMI which means it's already been called for event

jirka

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Re: pmu::read() called erroneously in v4.13-rc{3,4} Jiri Olsa <jolsa@redhat.com> - 2017-08-21 16:50 +0200

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