On Tue, Nov 24, 2020, Vipin Sharma wrote: > On Tue, Nov 24, 2020 at 09:27:25PM +0000, Sean Christopherson wrote: > > Is a root level stat file needed? Can't the infrastructure do .max - .current > > on the root cgroup to calculate the number of available ids in the system? > > For an efficient scheduling of workloads in the cloud infrastructure, a > scheduler needs to know the total capacity supported and the current > usage of the host to get the overall picture. There are some issues with > .max -.current approach: > > 1. Cgroup v2 convention is to not put resource control files in the > root. This will mean we need to sum (.max -.current) in all of the > immediate children of the root. Ah, that's annoying. Now that you mention it, I do vaguely recall this behavior. > 2. .max can have any limit unless we add a check to not allow a user to > set any value more than the supported one. Duh, didn't think that one through. Thanks!
