cgroup.memory.limit returning incorrect value?

[hc000]

While doing some testing I noticed this metric is returning the max value of 64-bit unsigned integer.

Tested on a VM with 2GB of ram and a bare metal with 256GB of ram.
Saw this in Version 3.10.9-1 and 3.11.0

[natoscott]

Hi Henry,

This value is extracted directly the kernel via /sys/fs/cgroup/memory/[...]memory.limit_in_bytes ... do you see different values in those files?

[hc000]

Hi Nathan,

It does indeed show match the value.

root@slave2:/sys/fs/cgroup/memory/docker/f4a901378ba4ef619091a4ee9c71607eeb81e25ec75bdd66184e147471d95dfe# cat memory.limit_in_bytes && cat memory.usage_in_bytes
18446744073709551615
29466624

Memory usage in bytes seems to be correct but not memory limit.

I think its related to this issue docker/docker#18087

Is there any metric that gets the values of MemTotal and MemFree from /proc/meminfo ?
MemTotal: 1017724 kB
MemFree: 660800 kB

these looks similar:

mem.physmem
value 1017724
mem.freemem
value 656860