summaryrefslogtreecommitdiff
path: root/kernel/cgroup/misc.c
diff options
context:
space:
mode:
authorLeiZhou-97 <lei.zhou@intel.com>2023-06-13 18:59:29 +0800
committerTejun Heo <tj@kernel.org>2023-06-21 10:43:29 -1000
commite973dfe9299441ad263efedf094897fbb31e6a87 (patch)
treef82e03504488762181fbca61573c7e47ee4e4942 /kernel/cgroup/misc.c
parent36de5f303ca1bd6fce74815ef17ef3d8ff8737b5 (diff)
cgroup/misc: Expose misc.current on cgroup v2 root
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@intel.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/cgroup/misc.c')
-rw-r--r--kernel/cgroup/misc.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/kernel/cgroup/misc.c b/kernel/cgroup/misc.c
index fe3e8a0eb7ed..ae2f4dd47508 100644
--- a/kernel/cgroup/misc.c
+++ b/kernel/cgroup/misc.c
@@ -357,7 +357,6 @@ static struct cftype misc_cg_files[] = {
{
.name = "current",
.seq_show = misc_cg_current_show,
- .flags = CFTYPE_NOT_ON_ROOT,
},
{
.name = "capacity",