lkml.org 
[lkml]   [2011]   [Aug]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 2/2] percpu_counter: Put a reasonable upper bound on percpu_counter_batch
From
Date
Le vendredi 26 août 2011 à 07:29 +1000, Anton Blanchard a écrit :

> +/*
> + * 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);



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2011-08-26 10:41    [W:0.059 / U:1.152 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site