Re: [PATCH v10 07/12] task_isolation: add debug boot flag

[Peter Zijlstra]

On Wed, Mar 02, 2016 at 03:09:31PM -0500, Chris Metcalf wrote:
> +void task_isolation_debug(int cpu)
> +{
> +	struct task_struct *p;
> +
> +	if (!task_isolation_possible(cpu))
> +		return;
> +
> +	rcu_read_lock();
> +	p = cpu_curr(cpu);
> +	get_task_struct(p);

As I think Oleg keeps reminding me, this is not actually a safe thing to
do.

> +	rcu_read_unlock();
> +	task_isolation_debug_task(cpu, p);
> +	put_task_struct(p);
> +}