On Fri, Mar 08, 2019 at 03:14:18PM +1100, Tobin C. Harding wrote:
> --- a/mm/slub.c
> +++ b/mm/slub.c
> @@ -3642,6 +3642,7 @@ static int kmem_cache_open(struct kmem_cache *s, slab_flags_t flags)
>
> set_cpu_partial(s);
>
> + s->defrag_used_ratio = 30;
> #ifdef CONFIG_NUMA
> s->remote_node_defrag_ratio = 1000;
> #endif
> @@ -5261,6 +5262,28 @@ static ssize_t destroy_by_rcu_show(struct kmem_cache *s, char *buf)
> }
> SLAB_ATTR_RO(destroy_by_rcu);
>
> +static ssize_t defrag_used_ratio_show(struct kmem_cache *s, char *buf)
> +{
> + return sprintf(buf, "%d\n", s->defrag_used_ratio);
> +}
> +
> +static ssize_t defrag_used_ratio_store(struct kmem_cache *s,
> + const char *buf, size_t length)
> +{
> + unsigned long ratio;
> + int err;
> +
> + err = kstrtoul(buf, 10, &ratio);
> + if (err)
> + return err;
> +
> + if (ratio <= 100)
> + s->defrag_used_ratio = ratio;
else
return -EINVAL;
maybe?
Tycho
