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Message-ID: <Zdd3FEWVnxaqdgHR@localhost.localdomain>
Date: Thu, 22 Feb 2024 17:32:20 +0100
From: Frederic Weisbecker <frederic@...nel.org>
To: Boqun Feng <boqun.feng@...il.com>
Cc: linux-kernel@...r.kernel.org, rcu@...r.kernel.org,
Neeraj Upadhyay <Neeraj.Upadhyay@....com>,
"Paul E. McKenney" <paulmck@...nel.org>,
Chen Zhongjin <chenzhongjin@...wei.com>,
Yang Jihong <yangjihong1@...wei.com>,
Neeraj Upadhyay <quic_neeraju@...cinc.com>,
Joel Fernandes <joel@...lfernandes.org>,
Josh Triplett <josh@...htriplett.org>,
Steven Rostedt <rostedt@...dmis.org>,
Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
Lai Jiangshan <jiangshanlai@...il.com>,
Zqiang <qiang.zhang1211@...il.com>
Subject: Re: [PATCH v2 4/6] rcu-tasks: Maintain lists to eliminate
RCU-tasks/do_exit() deadlocks
Le Fri, Feb 16, 2024 at 05:27:39PM -0800, Boqun Feng a écrit :
> From: "Paul E. McKenney" <paulmck@...nel.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@...wei.com>
> Reported-by: Yang Jihong <yangjihong1@...wei.com>
> Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
> Tested-by: Yang Jihong <yangjihong1@...wei.com>
> Tested-by: Chen Zhongjin <chenzhongjin@...wei.com>
> Signed-off-by: Boqun Feng <boqun.feng@...il.com>
Reviewed-by: Frederic Weisbecker <frederic@...nel.org>
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