linux-kernel - Re: [PATCH rcu 05/12] rcu: Forbid RCU_STRICT_GRACE_PERIOD in TINY

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Date:   Tue, 21 Jun 2022 11:32:28 +0530
From:   Neeraj Upadhyay <quic_neeraju@...cinc.com>
To:     "Paul E. McKenney" <paulmck@...nel.org>, <rcu@...r.kernel.org>
CC:     <linux-kernel@...r.kernel.org>, <kernel-team@...com>,
        <rostedt@...dmis.org>
Subject: Re: [PATCH rcu 05/12] rcu: Forbid RCU_STRICT_GRACE_PERIOD in TINY_RCU
 kernels



On 6/21/2022 3:50 AM, Paul E. McKenney wrote:
> The RCU_STRICT_GRACE_PERIOD Kconfig option does nothing in kernels
> built with CONFIG_TINY_RCU=y, so this commit adjusts the dependencies
> to disallow this combination.
> 
> Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
> ---

Reviewed-by: Neeraj Upadhyay <quic_neeraju@...cinc.com>


Thanks
Neeraj

>   kernel/rcu/Kconfig.debug | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/rcu/Kconfig.debug b/kernel/rcu/Kconfig.debug
> index 9b64e55d4f615..4da05beb13d79 100644
> --- a/kernel/rcu/Kconfig.debug
> +++ b/kernel/rcu/Kconfig.debug
> @@ -121,7 +121,7 @@ config RCU_EQS_DEBUG
>   
>   config RCU_STRICT_GRACE_PERIOD
>   	bool "Provide debug RCU implementation with short grace periods"
> -	depends on DEBUG_KERNEL && RCU_EXPERT && NR_CPUS <= 4
> +	depends on DEBUG_KERNEL && RCU_EXPERT && NR_CPUS <= 4 && !TINY_RCU
>   	default n
>   	select PREEMPT_COUNT if PREEMPT=n
>   	help