linux-kernel - Re: [PATCH] rcu-tasks: Fix the comments for tasks_rcu_exit_srcu_stall

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Date: Mon, 26 Feb 2024 11:28:57 +0800
From: Z qiang <qiang.zhang1211@...il.com>
To: paulmck@...nel.org, frederic@...nel.org, neeraj.upadhyay@...nel.org, 
	joel@...lfernandes.org
Cc: rcu@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rcu-tasks: Fix the comments for tasks_rcu_exit_srcu_stall_timer

>
> The synchronize_srcu() has been removed by commit("rcu-tasks: Eliminate
> deadlocks involving do_exit() and RCU tasks") in rcu_tasks_postscan.
> This commit therefore fix the comments of tasks_rcu_exit_srcu_stall_timer.
>
> Signed-off-by: Zqiang <qiang.zhang1211@...il.com>
> ---
>  kernel/rcu/tasks.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h
> index 78d74c81cc24..d5319bbe8c98 100644
> --- a/kernel/rcu/tasks.h
> +++ b/kernel/rcu/tasks.h
> @@ -150,7 +150,7 @@ static struct rcu_tasks rt_name =                                                   \
>
>  #ifdef CONFIG_TASKS_RCU
>
> -/* Report delay in synchronize_srcu() completion in rcu_tasks_postscan(). */
> +/* Report delay of scan exiting tasklist in rcu_tasks_postscan(). */
>  static void tasks_rcu_exit_srcu_stall(struct timer_list *unused);
>  static DEFINE_TIMER(tasks_rcu_exit_srcu_stall_timer, tasks_rcu_exit_srcu_stall);

Is this timer not necessary? any thoughts?

Thanks
Zqiang


>  #endif
> --
> 2.17.1
>