Re: [PATCH v8 12/14] x86: perf: intel_pt: Intel PT PMU driver

[Peter Zijlstra]

On Fri, Nov 14, 2014 at 03:43:45PM +0200, Alexander Shishkin wrote:
> +static void pt_event_stop(struct perf_event *event, int mode)
> +{
> +	struct pt *pt = this_cpu_ptr(&pt_ctx);
> +
> +	ACCESS_ONCE(pt->handle_nmi) = 0;

Why is this needed? Will the hardware still generate interrupts if you
stop the PT thing?
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