(2012/04/17 7:31), Tejun Heo wrote:
> On Thu, Apr 12, 2012 at 08:20:06PM +0900, KAMEZAWA Hiroyuki wrote:
>> +/*
>> + * In hierarchical accounting, child's usage is accounted into ancestors.
>> + * To move local usage to its parent, just forget current level usage.
>> + */
>> +void res_counter_move_parent(struct res_counter *counter, unsigned long val)
>> +{
>> + unsigned long flags;
>> +
>> + BUG_ON(!counter->parent);
>> + spin_lock_irqsave(&counter->lock, flags);
>> + res_counter_uncharge_locked(counter, val);
>> + spin_unlock_irqrestore(&counter->lock, flags);
>> +}
>
> On the second thought, do we need this at all? It's as good as doing
> nothing after all, no?
>
I considered that, but I think it may make it hard to debug memcg leakage.
I'd like to confirm res->usage == 0 at removal of memcg.
Thanks,
-Kame
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