linux-kernel - Re: [PATCH tip/sched/core v2] sched/rt: Simplify the IPI rt balancing logic

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Message-ID: <20170504144128.k2a5vxebtyly7qlv@hirez.programming.kicks-ass.net>
Date:   Thu, 4 May 2017 16:41:28 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>,
        Clark Williams <williams@...hat.com>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        John Kacur <jkacur@...hat.com>, Scott Wood <swood@...hat.com>
Subject: Re: [PATCH tip/sched/core v2] sched/rt: Simplify the IPI rt
 balancing logic

On Mon, Apr 24, 2017 at 11:47:32AM -0400, Steven Rostedt wrote:
> +	/* Keep the loop going if the IPI is currently active */
> +	atomic_inc_return(&rq->rd->rto_loop_next);

What's the return for?