I've started using cgoups (cgreate -g cpu:gr1 / cgset -r cpu.max / cgexec) regularly recently. More than once I've noticed I create cgroup and run a command as above, then after a day or two (of other work with linux system not restarted, however could be suspended and resumed), want to repeat the same command, but "cgroup change of group failed" and I see in /sys/fs that group does not have file named cpu.max. Web search had not found anything similar. What could be the cause? How to investigate? TIA
Interestingly today after I observed the issue, I've added another cgroup (cgreate / cgset cpu.max) and I've seen the problematic group also having cpu.max and the original command works again.
I recall I'm able to run the command several times in a day, it is that when I try to run it next day (about that duration) and maybe only after suspend (but I'm not sure) I often observe the issue.
