linux-kernel - Re: [RFC V2 1/2] irq: Add a framework to measure interrupt timings

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Message-ID: <20160120192805.GT6357@twins.programming.kicks-ass.net>
Date:	Wed, 20 Jan 2016 20:28:05 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:	tglx@...utronix.de, rafael@...nel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, nicolas.pitre@...aro.org,
	vincent.guittot@...aro.org
Subject: Re: [RFC V2 1/2] irq: Add a framework to measure interrupt timings

On Wed, Jan 20, 2016 at 05:00:32PM +0100, Daniel Lezcano wrote:
> +++ b/kernel/irq/handle.c
> @@ -165,6 +165,7 @@ irqreturn_t handle_irq_event_percpu(struct irq_desc *desc)
>  			/* Fall through to add to randomness */
>  		case IRQ_HANDLED:
>  			flags |= action->flags;
> +			handle_irqtiming(irq, action->dev_id);
>  			break;

This also looks completely busted for shared interrupts.