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@xxxxxxxxxx> 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>