Re: [PATCH v2 4/6] rcu-tasks: Maintain lists to eliminate RCU-tasks/do_exit() deadlocks

Frederic Weisbecker
2024-02-22T16:32:23Z

Le Fri, Feb 16, 2024 at 05:27:39PM -0800, Boqun Feng a écrit :
> From: "Paul E. McKenney" <paulmck@kernel.org>
>
> This commit continues the elimination of deadlocks involving do_exit()
> and RCU tasks by causing exit_tasks_rcu_start() to add the current
> task to a per-CPU list and causing exit_tasks_rcu_stop() to remove the
> current task from whatever list it is on. These lists will be used to
> track tasks that are exiting, while still accounting for any RCU-tasks
> quiescent states that these tasks pass though.
>
> [ paulmck: Apply Frederic Weisbecker feedback. ]
>
> Link: https://lore.kernel.org/all/20240118021842.290665-1-chenzhongjin@huawei.com/
>
> Reported-by: Chen Zhongjin <chenzhongjin@huawei.com>
> Reported-by: Yang Jihong <yangjihong1@huawei.com>
> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
> Tested-by: Yang Jihong <yangjihong1@huawei.com>
> Tested-by: Chen Zhongjin <chenzhongjin@huawei.com>
> Signed-off-by: Boqun Feng <boqun.feng@gmail.com>

Reviewed-by: Frederic Weisbecker <frederic@kernel.org>