linux-kernel - Scenario TREE07 with CONFIG_PREEMPT

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Message-ID: <20220310215630.GA3490034@paulmck-ThinkPad-P17-Gen-1>
Date:   Thu, 10 Mar 2022 13:56:30 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     frederic@...nel.org
Cc:     linux-kernel@...r.kernel.org
Subject: Scenario TREE07 with CONFIG_PREEMPT_DYNAMIC=n?

Hello, Frederic,

I recently added CONFIG_PREEMPT_DYNAMIC=n to the TREE07 file, and since
then am getting roughly one RCU CPU stall warning (or silent hang)
per few tens of hours of rcutorture testing on dual-socket systems.
The stall warnings feature starvation of RCU grace-period kthread.

Any advice on debugging this?

							Thanx, Paul