Re: [PATCH 2/2] percpu_counter: Put a reasonable upper bound onpercpu_counter_batch

[Eric Dumazet]

Le vendredi 26 aoÃt 2011 Ã 07:29 +1000, Anton Blanchard a Ãcrit :

> +/*
> + * We set the batch at 2 * num_online_cpus(), with a minimum of 32 and
> + * a maximum of 1024.
> + */
>  static void compute_batch_value(void)
>  {
>  	int nr = num_online_cpus();
>  
> -	percpu_counter_batch = max(32, nr*2);
> +	percpu_counter_batch = min(1024, max(32, nr*2));
>  }
>  
>  static int __cpuinit percpu_counter_hotcpu_callback(struct notifier_block *nb,

Or use the following :

percpu_counter_batch = clamp(nr*2, 32, 1024);



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