Re: [PATCH 1/3] perf/x86/intel: Factor out common code of PMI handler

[Peter Zijlstra]

On Mon, Aug 06, 2018 at 10:23:41AM -0700, kan.liang@xxxxxxxxxxxxxxx wrote:
> +	if (++loops > 100) {
> +		static bool warned;
> +
> +		if (!warned) {
> +			WARN(1, "perfevents: irq loop stuck!\n");
> +			perf_event_print_debug();
> +			warned = true;
> +		}

Bah, that really reads like we want WARN_ONCE(), except for that
perf_event_print_debug() thing :/