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From: Peter Zijlstra <peterz@infradead.org>
To: Fabio Checconi <fchecconi@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
	Paul Turner <pjt@google.com>,
	Dario Faggioli <faggioli@gandalf.sssup.it>,
	Michael Trimarchi <michael@evidence.eu.com>,
	Dhaval Giani <dhaval@retis.sssup.it>,
	Tommaso Cucinotta <t.cucinotta@sssup.it>,
	linux-kernel@vger.kernel.org,
	Fabio Checconi <fabio@gandalf.sssup.it>
Subject: Re: [PATCH 2/3] sched: enforce per-cpu utilization limits on runtime balancing
Date: Thu, 25 Feb 2010 21:28:24 +0100	[thread overview]
Message-ID: <1267129704.22519.560.camel@laptop> (raw)
In-Reply-To: <91b76b9b7555024d9afd7264eeae1b2db6a5e74c.1266931410.git.fabio@helm.retis>

On Tue, 2010-02-23 at 19:56 +0100, Fabio Checconi wrote:
> +static inline void double_spin_lock(raw_spinlock_t *lock1,
> +                                   raw_spinlock_t *lock2)
> +       __acquires(lock1)
> +       __acquires(lock2)
> +{
> +       if (lock1 < lock2) {
> +               raw_spin_lock(lock1);
> +               raw_spin_lock_nested(lock2, SINGLE_DEPTH_NESTING);
> +       } else {
> +               raw_spin_lock(lock2);
> +               raw_spin_lock_nested(lock1, SINGLE_DEPTH_NESTING);
> +       }
> +}
> +
> +static inline void double_spin_unlock(raw_spinlock_t *lock1,
> +                                     raw_spinlock_t *lock2)
> +       __releases(lock1)
> +       __releases(lock2)
> +{
> +       raw_spin_unlock(lock1);
> +       lock_set_subclass(&lock2->dep_map, 0, _RET_IP_);
> +       raw_spin_unlock(lock2);
> +} 

If you release both there is no need to re-set the subclass.


  parent reply	other threads:[~2010-02-25 21:44 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-02-23 18:56 [PATCH 0/3] sched: use EDF to throttle RT task groups v2 Fabio Checconi
2010-02-23 18:56 ` [PATCH 1/3] sched: use EDF to schedule groups Fabio Checconi
2010-02-25 20:28   ` Peter Zijlstra
2010-03-03 16:59     ` Fabio Checconi
2010-02-23 18:56 ` [PATCH 2/3] sched: enforce per-cpu utilization limits on runtime balancing Fabio Checconi
2010-02-25 20:28   ` Peter Zijlstra
2010-03-03 16:59     ` Fabio Checconi
2010-02-25 20:28   ` Peter Zijlstra
2010-03-03 17:00     ` Fabio Checconi
2010-03-23 20:32       ` Peter Zijlstra
2010-02-25 20:28   ` Peter Zijlstra [this message]
2010-03-03 16:59     ` Fabio Checconi
2010-02-25 20:28   ` Peter Zijlstra
2010-03-03 17:00     ` Fabio Checconi
2010-03-23 20:33       ` Peter Zijlstra
2010-02-25 20:28   ` Peter Zijlstra
2010-03-03 17:00     ` Fabio Checconi
2010-02-23 18:56 ` [PATCH 3/3] sched: make runtime balancing code more EDF-friendly Fabio Checconi
2010-02-25 20:28   ` Peter Zijlstra
2010-03-03 17:01     ` Fabio Checconi
2010-02-25 20:28 ` [PATCH 0/3] sched: use EDF to throttle RT task groups v2 Peter Zijlstra
2010-02-27 12:33 ` Peter Zijlstra
2010-03-03 17:01   ` Fabio Checconi
2010-03-23 20:30     ` Peter Zijlstra
2010-03-23 20:56       ` Dhaval Giani
2010-03-23 21:51         ` Tommaso Cucinotta

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