Re: [PATCH v2 1/2] kernel/events: Add option to notify through signals on wakeup

[Vince Weaver]

On Tue, 1 Aug 2017, Naveen N. Rao wrote:

> Add a new option 'signal_on_wakeup' to request for a signal to be
> delivered on ring buffer wakeup controlled through watermark and
> {wakeup_events, wakeup_watermark}. HUP is signaled on exit.
> 
> Setting signal_on_wakeup disables use of IOC_REFRESH to control signal
> delivery, instead relying on IOC_ENABLE/DISABLE.

so I probably missed the original thread on this new interface, but why is 
IOC_REFRESH not being used?

For new interfaces like this it's also nice to have some text that can be 
added to the perf_event_open() manpage, especially if there's weird 
conditions like this.

Vince