linux-kernel - Re: [PATCH -next v2 2/4] rcu/nocb: Add warning if no rcuog wake up attempt happened during overload

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Message-ID: <aWqz9Wvrf5683OBQ@pavilion.home>
Date: Fri, 16 Jan 2026 22:56:05 +0100
From: Frederic Weisbecker <frederic@...nel.org>
To: Joel Fernandes <joelagnelf@...dia.com>
Cc: linux-kernel@...r.kernel.org, "Paul E . McKenney" <paulmck@...nel.org>,
	Boqun Feng <boqun.feng@...il.com>, rcu@...r.kernel.org,
	Neeraj Upadhyay <neeraj.upadhyay@...nel.org>,
	Josh Triplett <josh@...htriplett.org>,
	Uladzislau Rezki <urezki@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Lai Jiangshan <jiangshanlai@...il.com>,
	Zqiang <qiang.zhang@...ux.dev>
Subject: Re: [PATCH -next v2 2/4] rcu/nocb: Add warning if no rcuog wake up
 attempt happened during overload

Le Wed, Jan 14, 2026 at 12:31:52PM -0500, Joel Fernandes a écrit :
> @@ -1254,6 +1262,7 @@ lazy_rcu_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
>  			continue;
>  		}
>  		rcu_nocb_try_flush_bypass(rdp, jiffies);
> +		rdp->nocb_gp_handling = true;

It should be true already, right?

>  		rcu_nocb_unlock_irqrestore(rdp, flags);
>  		wake_nocb_gp(rdp);
>  		sc->nr_to_scan -= _count;

Thanks.

-- 
Frederic Weisbecker
SUSE Labs