[Devel] Re: [PATCH v3 09/16] sl[au]b: always get the cache from its page in kfree

[Pekka Enberg]

On Fri, Sep 21, 2012 at 11:07 PM, Tejun Heo <tj at 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.