Bug#803013: systemd should not destroy application created cgroups

[Martin Pitt]

paul.szabo at sydney.edu.au [2015-10-29 21:46 +1100]:
> Could do; or do on a throw-away partition; either way it takes hours,
> not minutes. I presume you have an "unstable" machine handy. Then you
> can test in seconds (as root):
> 
>   # Set things up
>   mkdir /sys/fs/cgroup/cpu/mytest
>   echo $$ > /sys/fs/cgroup/cpu/mytest/tasks
>   # Check it is there
>   grep . /sys/fs/cgroup/cpu/mytest/tasks
>   # Do the systemd thing
>   systemctl daemon-reload
>   systemctl start anacron
>   # See it gone
>   grep . /sys/fs/cgroup/cpu/mytest/tasks

I tested this under 225 and 227, and in both cases the bash process
stayed in that cgroup. I don't currently have a jessie VM around to
confirm that I can actually reproduce the issue on 215; but I think
Michael does.

This actually sounds similar to https://bugs.debian.org/777601, but
this already got fixed in 215-12, thus in Jessie.

Martin

-- 
Martin Pitt                        | http://www.piware.de
Ubuntu Developer (www.ubuntu.com)  | Debian Developer  (www.debian.org)