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From: Frederic Weisbecker <frederic@kernel.org>
To: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: linux-kernel@vger.kernel.org, bigeasy@linutronix.de,
	tglx@linutronix.de, bristot@redhat.com,
	paulmck@linux.vnet.ibm.com, peterz@infradead.org
Subject: Re: [PATCH] nohz: Fix local_timer_softirq_pending()
Date: Tue, 31 Jul 2018 19:14:27 +0200
Message-ID: <20180731171426.GD28353@lerouge> (raw)
In-Reply-To: <20180731161358.29472-1-anna-maria@linutronix.de>

On Tue, Jul 31, 2018 at 06:13:58PM +0200, Anna-Maria Gleixner wrote:
> local_timer_softirq_pending() checks whether the timer softirq is
> pending with: local_softirq_pending() & TIMER_SOFTIRQ.
> 
> This is wrong because TIMER_SOFTIRQ is the softirq number and not a
> bitmask. So the test checks for the wrong bit.
> 
> Use BIT(TIMER_SOFTIRQ) instead.
> 
> Fixes: 5d62c183f9e9 ("nohz: Prevent a timer interrupt storm in tick_nohz_stop_sched_tick()")
> Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>

Acked-by: Frederic Weisbecker <frederic@kernel.org>

Thanks!

  parent reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-31 16:13 Anna-Maria Gleixner
2018-07-31 16:50 ` Paul E. McKenney
2018-07-31 17:07 ` Daniel Bristot de Oliveira
2018-07-31 17:14 ` Frederic Weisbecker [this message]
2018-07-31 20:13 ` [tip:timers/urgent] " tip-bot for Anna-Maria Gleixner

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