virtio-fs: virtiofsd daemon is not in sandbox cgroup

[renzhengeek]

Description of problem

virtiofsd daemon is not in sandbox cgroup.

Expected result

qemu and virtiofsd are in the same cgroup.

Actual result

qemu pid: 44986
virtiofsd pid: 44981

qemu cgroups:

$cat /proc/44986/cgroup 
11:memory:/kata/default/kata_9f49ba797580a17bdc1ab6881af038246bb93fa3dbfaa5f91c5b4bdb2b785777
10:hugetlb:/
9:perf_event:/
8:blkio:/
7:pids:/
6:net_cgroup:/
5:freezer:/
4:net_cls,net_prio:/
3:devices:/
2:cpuset,cpu,cpuacct:/
1:name=systemd:/

virtiofsd cgroups:

$cat /proc/44981/cgroup 
11:memory:/
10:hugetlb:/
9:perf_event:/
8:blkio:/
7:pids:/
6:net_cgroup:/
5:freezer:/
4:net_cls,net_prio:/
3:devices:/
2:cpuset,cpu,cpuacct:/
1:name=systemd:/

[renzhengeek]

Thanks! Now qemu and virtiofsd are in the same cgroup:

# ps -o cgroup 85108
CGROUP
4:memory:/kata/default/kata_ce737c285b06a24a900dac0649d9a7ab6541ca89f878dd5e1ad0c23ca3a1c4ab
# ps -o cgroup 85101
CGROUP
4:memory:/kata/default/kata_ce737c285b06a24a900dac0649d9a7ab6541ca89f878dd5e1ad0c23ca3a1c4ab