On Tue, Jun 13, 2023 at 06:59:29PM +0800, LeiZhou-97 wrote: > Hello, > > This patch is to expose misc.current on cgroup v2 root for tracking > how much of the resource has been consumed in total on the system. > > Most of the cloud infrastucture use cgroup to fetch the host > information for scheduling purpose. > > Currently, the misc controller can be used by Intel TDX HKIDs and > AMD SEV ASIDs, which are both used for creating encrypted VMs. > Intel TDX and AMD SEV are mostly be used by the cloud providers > for providing confidential VMs. > > In actual use of a server, these confidential VMs may be launched > in different ways. For the cloud solution, there are kubvirt and > coco (tracked by kubepods.slice); on host, they can be booted > directly through qemu by end user (tracked by user.slice), etc. > > In this complex environment, when wanting to know how many resource > is used in total it has to iterate through all existing slices to > get the value of each misc.current and add them up to calculate > the total number of consumed keys. > > So exposing misc.current to root cgroup tends to give much easier > when calculates how much resource has been used in total, which > helps to schedule and count resources for the cloud infrastucture. > > Signed-off-by: LeiZhou-97 <lei.zhou@xxxxxxxxx> Applied to cgroup/for-6.5. Thanks. -- tejun
