linux-kernel - Re: [PATCH v2 2/2] Documentation/kernel-parameters: Update rcu_normal_wake_from

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Message-ID: <fcac9488-a755-40a3-a643-b7cf7288714e@nvidia.com>
Date: Wed, 11 Jun 2025 17:49:14 -0400
From: Joel Fernandes <joelagnelf@...dia.com>
To: "Uladzislau Rezki (Sony)" <urezki@...il.com>,
 "Paul E . McKenney" <paulmck@...nel.org>,
 Neeraj upadhyay <Neeraj.Upadhyay@....com>
Cc: Joel Fernandes <joel@...lfernandes.org>, RCU <rcu@...r.kernel.org>,
 LKML <linux-kernel@...r.kernel.org>,
 Frederic Weisbecker <frederic@...nel.org>
Subject: Re: [PATCH v2 2/2] Documentation/kernel-parameters: Update
 rcu_normal_wake_from_gp doc

On 6/11/2025 1:56 PM, Uladzislau Rezki (Sony) wrote:
> Update the documentation about rcu_normal_wake_from_gp parameter.
> 
> Signed-off-by: Uladzislau Rezki (Sony) <urezki@...il.com>

Reviewed-by: Joel Fernandes <joelagnelf@...dia.com>

Thanks.

> ---
>  Documentation/admin-guide/kernel-parameters.txt | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index f1f2c0874da9..f7e4bee2b823 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -5485,7 +5485,8 @@
>  			echo 1 > /sys/module/rcutree/parameters/rcu_normal_wake_from_gp
>  			or pass a boot parameter "rcutree.rcu_normal_wake_from_gp=1"
>  
> -			Default is 0.
> +			Default is 1 if num_possible_cpus() <= 16 and it is not explicitly
> +			disabled by the boot parameter passing 0.
>  
>  	rcuscale.gp_async= [KNL]
>  			Measure performance of asynchronous