From: Peter Zijlstra <peterz@infradead.org>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Kevin Hilman <khilman@linaro.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Viresh Kumar <viresh.kumar@linaro.org>
Subject: Re: [PATCH 1/5] irq_work: Split raised and lazy lists
Date: Tue, 3 Jun 2014 16:54:42 +0200 [thread overview]
Message-ID: <20140603145442.GS30445@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <1401806420-31018-2-git-send-email-fweisbec@gmail.com>
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On Tue, Jun 03, 2014 at 04:40:16PM +0200, Frederic Weisbecker wrote:
> @@ -90,10 +89,10 @@ EXPORT_SYMBOL_GPL(irq_work_queue);
>
> bool irq_work_needs_cpu(void)
> {
> - struct llist_head *this_list;
> + struct llist_head *list;
>
> - this_list = &__get_cpu_var(irq_work_list);
> - if (llist_empty(this_list))
> + list = &__get_cpu_var(lazy_list);
> + if (llist_empty(list))
> return false;
>
> /* All work should have been flushed before going offline */
Does this mean needs_cpu() only checks the lazy list? What about archs
without the arch_irq_work_raise() function? They run the other list from
the tick too.
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next prev parent reply other threads:[~2014-06-03 14:54 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-03 14:40 [GIT PULL] nohz: Move nohz kick out of scheduler IPI, v7 Frederic Weisbecker
2014-06-03 14:40 ` [PATCH 1/5] irq_work: Split raised and lazy lists Frederic Weisbecker
2014-06-03 14:54 ` Peter Zijlstra [this message]
2014-06-03 14:56 ` Frederic Weisbecker
2014-06-03 14:40 ` [PATCH 2/5] irq_work: Shorten a bit irq_work_needs_cpu() Frederic Weisbecker
2014-06-03 14:40 ` [PATCH 3/5] irq_work: Implement remote queueing Frederic Weisbecker
2014-06-03 15:00 ` Peter Zijlstra
2014-06-03 15:08 ` Frederic Weisbecker
2014-06-03 16:29 ` Eric Dumazet
2014-06-03 16:37 ` Peter Zijlstra
2014-06-03 20:02 ` Eric Dumazet
2014-06-03 20:29 ` Frederic Weisbecker
2014-06-03 14:40 ` [PATCH 4/5] nohz: Move full nohz kick to its own IPI Frederic Weisbecker
2014-06-03 15:00 ` Peter Zijlstra
2014-06-03 14:40 ` [PATCH 5/5] nohz: Use IPI implicit full barrier against rq->nr_running r/w Frederic Weisbecker
2014-06-03 15:02 ` Peter Zijlstra
2014-06-03 14:43 ` [GIT PULL] nohz: Move nohz kick out of scheduler IPI, v7 Frederic Weisbecker
-- strict thread matches above, loose matches on Subject: below --
2014-05-25 14:29 [PATCH 0/5] nohz: Move nohz kick out of scheduler IPI, v6 Frederic Weisbecker
2014-05-25 14:29 ` [PATCH 1/5] irq_work: Split raised and lazy lists Frederic Weisbecker
2014-05-26 15:59 ` Peter Zijlstra
2014-05-26 16:53 ` Frederic Weisbecker
2014-05-26 19:26 ` Peter Zijlstra
2014-05-26 19:33 ` Frederic Weisbecker
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