Hello, On Thu, Feb 01, 2018 at 05:49:42PM +0100, Peter Zijlstra wrote: > > Well, they're upper limits, not strict allocations. The current > > behavior implemented by cpu isn't either a strict allocation or upper > > limits. It disallows a child from having a value higher than the > > parent (allocation-ish) but the sum of the children is allowed to > > exceed the parent's (limit-ish). > > True; but its still weird to have the parent 'promise' something and > then retract that 'promise' later. Yeah, depending on how you look at it, it can feel weird. It's just that viewing these absolute resource limits (cpu.max, memory.{high,max}, io.max, pids.max) as upper bounds seems to be the best abstraction in terms of capturing what they do and making uses of them in a robust way. > > We had this sort of input validations in different controllers all in > > their own ways. In most cases, these aren't well thought out and we > > can't support things like delegation without aligning controller > > behaviors. > > I suppose.. > > Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Will route it through cgroup fixes branch in a week or so. Thanks a lot. -- tejun -- 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