On Tue, Jun 06, 2017 at 08:21:18PM +0530, Naveen N. Rao wrote: > Many perf sideband events (context switches, namespaces, ...) are useful > by themselves without the need for subscribing to any overflow events. > However, it is not possible to subscribe for notifications when such > records are logged into the ring buffer. Introduce IOC_COUNT_RECORDS as > a way to request this. > > With IOC_COUNT_RECORDS set, IOC_REFRESH takes the number of records > after which to generate a notification, rather than the number of > overflow events. > > Signed-off-by: Naveen N. Rao <[email protected]> > --- > include/linux/perf_event.h | 1 + > include/uapi/linux/perf_event.h | 1 + > kernel/events/core.c | 16 +++++++++++++++- > kernel/events/ring_buffer.c | 9 +++++++++ > 4 files changed, 26 insertions(+), 1 deletion(-) > > diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h > index 24a635887f28..016f2da2bba7 100644 > --- a/include/linux/perf_event.h > +++ b/include/linux/perf_event.h > @@ -683,6 +683,7 @@ struct perf_event { > struct irq_work pending; > > atomic_t event_limit; > + bool count_records;
This is an instant nack ;-) Never, that is _never_ use bool in composite types.
