Messages in this thread | | | Date | Fri, 21 Sep 2012 13:16:02 -0700 | From | Tejun Heo <> | Subject | Re: [PATCH v3 09/16] sl[au]b: always get the cache from its page in kfree |
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On Fri, Sep 21, 2012 at 11:14:45PM +0300, Pekka Enberg wrote: > 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.
Ah, misread, though you were talking about MEMCG_KMEM && not in use. Yeap, if turned off in Kconfig, it shouldn't have any performance overhead.
Thanks.
-- tejun
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