On Fri, 21 Sep 2012, Glauber Costa wrote: > > We should assume that most distributions enable CONFIG_MEMCG_KMEM, > > right? Therfore, any performance impact should be dependent on whether > > or not kmem memcg is *enabled* at runtime or not. > > > > Can we use the "static key" thingy introduced by tracing folks for this? > > Yes. > > I am already using static keys extensively in this patchset, and that is > how I intend to handle this particular case. Cool. The key point here is that !CONFIG_MEMCG_KMEM should have exactly *zero* performance impact and CONFIG_MEMCG_KMEM disabled at runtime should have absolute minimal impact. Pekka -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
