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Subject: Re: [PATCH v3 09/16] sl[au]b: always get the cache from its page in kfree
From: Pekka Enberg <penberg@kernel.org>
To: Tejun Heo <tj@kernel.org>
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On Fri, Sep 21, 2012 at 11:07 PM, Tejun Heo <tj@kernel.org> wrote:
> Not necessarily disagreeing, but I don't think it's helpful to set the
> bar impossibly high.  Even static_key doesn't have "exactly *zero*"
> impact.  Let's stick to as minimal as possible when not in use and
> reasonable in use.

For !CONFIG_MEMCG_KMEM, it should be exactly zero. No need to play
games with static_key.