Re: [PATCH v9 06/13] task_isolation: add debug boot flag

From	Steven Rostedt <rostedt@goodmis.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH v9 06/13] task_isolation: add debug boot flag
Date	2016-01-05 00:00 +0100
Message-ID	<qNmgx-1m8-1@gated-at.bofh.it> (permalink)
References	<qNk54-8oP-13@gated-at.bofh.it> <qNmgx-1m8-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Mon, 4 Jan 2016 14:34:44 -0500
Chris Metcalf <cmetcalf@ezchip.com> wrote:


> +#ifdef CONFIG_TASK_ISOLATION
> +void task_isolation_debug(int cpu)
> +{
> +	struct task_struct *p;
> +
> +	if (!task_isolation_possible(cpu))
> +		return;
> +
> +	rcu_read_lock();

What's the rcu_read_lock() for? I don't see what is being protected by
rcu here?

-- Steve

> +	p = cpu_curr(cpu);
> +	get_task_struct(p);
> +	rcu_read_unlock();
> +	task_isolation_debug_task(cpu, p);
> +	put_task_struct(p);
> +}
> +#endif
> +
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Re: [PATCH v9 06/13] task_isolation: add debug boot flag Steven Rostedt <rostedt@goodmis.org> - 2016-01-05 00:00 +0100
  Re: [PATCH v9 06/13] task_isolation: add debug boot flag Chris Metcalf <cmetcalf@ezchip.com> - 2016-01-05 00:50 +0100
    Re: [PATCH v9 06/13] task_isolation: add debug boot flag Steven Rostedt <rostedt@goodmis.org> - 2016-01-05 14:50 +0100

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