> Choose if we want cached pages to be accounted or not. By default both
> are accounted for. A new set of tunables are added.
> 
> echo -n 1 > mem_control_type
> 
> switches the accounting to account for only mapped pages
> 
> echo -n 2 > mem_control_type
> 
> switches the behaviour back

MEM_CONTAINER_TYPE_ALL is 3, not 2.

YAMAMOTO Takashi

> +enum {
> +	MEM_CONTAINER_TYPE_UNSPEC = 0,
> +	MEM_CONTAINER_TYPE_MAPPED,
> +	MEM_CONTAINER_TYPE_CACHED,
> +	MEM_CONTAINER_TYPE_ALL,
> +	MEM_CONTAINER_TYPE_MAX,
> +} mem_control_type;
> +
> +static struct mem_container init_mem_container;

> +	mem = rcu_dereference(mm->mem_container);
> +	if (mem->control_type == MEM_CONTAINER_TYPE_ALL)
> +		return mem_container_charge(page, mm);
> +	else
> +		return 0;
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