Re: [PATCH] mm, memcg: fix wrong mem cgroup protection

Hi Yafang,

I'm afraid I'm just as confused as Michal was about the intent of this patch.

Can you please be more concise and clear about the practical ramifications and demonstrate some pathological behaviour? I really can't visualise what's wrong here from your explanation, and if I can't understand it as the person who wrote this code, I am not surprised others are also confused :-)

Or maybe Roman can try to explain, since he acked the previous patch? At least to me, the emin/elow behaviour seems fairly non-trivial to reason about right now.

Thanks.