Re: [PATCH 1/3] perf: Do not POLLHUP event if it has children

[Peter Zijlstra]

On Fri, Sep 12, 2014 at 01:18:26PM +0200, Jiri Olsa wrote:
> Currently we return POLLHUP in event polling if the monitored
> process is done, but we didn't consider possible children,
> that might be still running and producing data.
> 
> Before returning POLLHUP making sure that
>    1) the monitored task has exited and that
>    2) we don't have any children to monitor
> 
> Also adding parent wakeup when the child event is gone.
> 
> Suggested-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
> Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
> Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Paul Mackerras <paulus@xxxxxxxxx>
> Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
> Cc: Stephane Eranian <eranian@xxxxxxxxxx>
> Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
> ---

Thanks Jiri (for all three patches)!
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