[systemd-devel] multiple cgroup hierarchies
l.stelmach at samsung.com
Mon May 12 02:43:33 PDT 2014
I've tried to update systemd to version 212 in Tizen. After I resolved
usual building problems and managed to make my device boot, I hit a
number of "Failed to create cgroup ..." messages. It took me some time
to find the reason (ah, the loveliness of parallel processing) which
appears to be a piece of software that tries to set up its own cgroup
hierarchy and destroys what systemd has done (definitely a
bug). However, I can see a problem with systemd too.
At some point before v212 Lennart decided to lock /sys/fs/cgroup tmpfs
instance mounting it read-only to prevent some issues with shmem.
However this commit also prevents other processes from creating their
own cgroup hierarchies. My question is: is it deliberate? Is there
(going to be?) a way to for "third-party" software to have their own
cgroup hierarchies next to systemd in /sys/fs/cgroup despite of it being
Samsung R&D Institute Poland
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