* Wanpeng Li <wanpeng...@hotmail.com> wrote:
> >>--- a/kernel/cpuset.c
> >>+++ b/kernel/cpuset.c
> >>@@ -2376,8 +2376,12 @@ void cpuset_cpus_allowed(struct task_struct *tsk,
> >>struct cpumask *pmask)
> >> void cpuset_cpus_allowed_fallback(struct task_struct *tsk)
> >> {
> >>+ unsigned long flags;
> >>+
> >> rcu_read_lock();
> >>+ raw_spin_lock_irqsave(&tsk->pi_lock, flags);
> >> do_set_cpus_allowed(tsk, task_cs(tsk)->effective_cpus);
> >>+ raw_spin_lock_irqsave(&tsk->pi_lock, flags);
> >Just curious, Will introduce deadlock after acquire lock twice? ;)
>
> Could you point out where acquires lock twice?
In the code you quote?
Thanks,
Ingo
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