Re: linux-next: arm32: beagleboard x15: WARNING: CPU: 0 PID: 0 at /usr/src/kernel/kernel/cgroup/cgroup.c:1969 cgroup_setup_root+0x36c/0x4e8

Hi Tejun,

On Fri, 15 Nov 2019 at 04:12, Tejun Heo tj@kernel.org wrote:

...

[ 0.015402] WARNING: CPU: 0 PID: 0 at /usr/src/kernel/kernel/cgroup/cgroup.c:1969 cgroup_setup_root+0x36c/0x4e8

...

...

[ 0.015726] [<c053ac48>] (cgroup_setup_root) from [<c1c2a260>] (cgroup_init+0x108/0x560)

So, that's saying that the initial kernfs_node ino allocation returned something other than 1. Hmmm... x86_32 works fine. What does the following say?

# mkdir -p /tmp/cgroup2 # mount -t cgroup2 none /tmp/cgroup2 # ls -lid /tmp/cgroup2

mkdir -p /tmp/cgroup2 mount -t cgroup2 none /tmp/cgroup2 ls -lid /tmp/cgroup2 1 dr-xr-xr-x 5 root root 0 Nov 15 08:00 /tmp/cgroup2

Full test log link, https://lkft.validation.linaro.org/scheduler/job/1011451#L1170

- Naresh