Re: [PATCH 1/2] genirq/cpuhotplug: Reduce logging level for couple of prints

[Greg KH]

On Wed, Sep 23, 2020 at 05:08:31PM -0700, Prasad Sodagudi wrote:
> During the cpu hot plug stress testing, couple of messages
> continuous flooding on to the console is causing timers
> migration delay. Delayed time migrations from hot plugging
> core is causing device instability with watchdog. So reduce
> log level for couple of prints in cpu hot plug flow.
> 
> Signed-off-by: Prasad Sodagudi <psodagud@xxxxxxxxxxxxxx>
> ---
>  arch/arm64/kernel/smp.c | 2 +-
>  kernel/irq/cpuhotplug.c | 4 ++--
>  2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
> index 355ee9e..08da6e3 100644
> --- a/arch/arm64/kernel/smp.c
> +++ b/arch/arm64/kernel/smp.c
> @@ -338,7 +338,7 @@ void __cpu_die(unsigned int cpu)
>  		pr_crit("CPU%u: cpu didn't die\n", cpu);
>  		return;
>  	}
> -	pr_notice("CPU%u: shutdown\n", cpu);
> +	pr_info("CPU%u: shutdown\n", cpu);
>  
>  	/*
>  	 * Now that the dying CPU is beyond the point of no return w.r.t.
> diff --git a/kernel/irq/cpuhotplug.c b/kernel/irq/cpuhotplug.c
> index 02236b1..82802e0 100644
> --- a/kernel/irq/cpuhotplug.c
> +++ b/kernel/irq/cpuhotplug.c
> @@ -42,7 +42,7 @@ static inline bool irq_needs_fixup(struct irq_data *d)
>  		 * If this happens then there was a missed IRQ fixup at some
>  		 * point. Warn about it and enforce fixup.
>  		 */
> -		pr_warn("Eff. affinity %*pbl of IRQ %u contains only offline CPUs after offlining CPU %u\n",
> +		pr_info("Eff. affinity %*pbl of IRQ %u contains only offline CPUs after offlining CPU %u\n",
>  			cpumask_pr_args(m), d->irq, cpu);
>  		return true;
>  	}
> @@ -166,7 +166,7 @@ void irq_migrate_all_off_this_cpu(void)
>  		raw_spin_unlock(&desc->lock);
>  
>  		if (affinity_broken) {
> -			pr_warn_ratelimited("IRQ %u: no longer affine to CPU%u\n",
> +			pr_info_ratelimited("IRQ %u: no longer affine to CPU%u\n",
>  					    irq, smp_processor_id());
>  		}
>  	}
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
> 

Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>