On 09/21/2012 10:14 PM, Tejun Heo wrote:
> Hello, Glauber.
>
> On Tue, Sep 18, 2012 at 06:11:59PM +0400, Glauber Costa wrote:
>> +void memcg_register_cache(struct mem_cgroup *memcg, struct kmem_cache *cachep)
>> +{
>> + int id = -1;
>> +
>> + if (!memcg)
>> + id = ida_simple_get(&cache_types, 0, MAX_KMEM_CACHE_TYPES,
>> + GFP_KERNEL);
>> + cachep->memcg_params.id = id;
>> +}
>
> I'm a bit confused. Why is id allocated only when memcg is NULL?
>
I think you figured that out already from your answer in another patch,
right? But I'll add a comment here since it seems to be a a natural
search point for people, explaining the mechanism.
> Also, how would the per-memcg slab/slubs appear in slabinfo? If they
> appear separately it might be better to give them readable cgroup
> names.
>
The new caches will appear under /proc/slabinfo with the rest, with a
string appended that identifies the group.
> Thanks.
>
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