Re: [PATCH v2] mm/memcg: use exist interface to get css from memcg

From: Wanpeng Li
Date: Thu Jul 19 2012 - 06:28:22 EST

On Thu, Jul 19, 2012 at 07:23:07PM +0900, Kamezawa Hiroyuki wrote:
>(2012/07/19 18:29), Michal Hocko wrote:
>>On Wed 18-07-12 19:08:54, Wanpeng Li wrote:
>>>use exist interface mem_cgroup_css instead of &mem->css.
>>This interface has been added to enable mem->css outside of
>>mm/memcontrol.c (where we define struct mem_cgroup). There is one user
>>left (hwpoison_filter_task) after recent clean ups.
>>I think we shouldn't spread the usage inside the mm/memcontrol.c. The
>>compiler inlines the function for all callers added by this patch but I
>>wouldn't rely on it. It is also unfortunate that we cannot convert all
>>dereferences (e.g. const mem_cgroup).
>>Moreover it doesn't add any additional type safety. So I would vote for
>>not taking the patch but if others like it I will not block it.

Hmm, I see, thank you. :-)

Best Regards,
Wanpeng Li

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