[Dev] Unknown lvalue 'ControlGroup' in section 'Service'

Łukasz Stelmach l.stelmach at samsung.com
Fri Dec 20 09:58:32 GMT 2013


It was <2013-12-20 pią 10:42>, when Yang Chengwei wrote:
> On Fri, Dec 20, 2013 at 02:47:18AM +0000, Wu, Zhiwen wrote:
>> Hi folks,
>> I created a minimal bootable image (just with sdb capability) from
>> latest repos of devel:wayland:Mobile for our Intel reference
>> device. And after boot-up and "sdb shell" to login the root user, I
>> found the user-session at .service failed at booting. The related log
>> from "journalctl" attached here:
>> ==============================================================================================================
>> [/usr/lib/systemd/system/graphical.target.wants/../user-session at .service:15]
>> Unknown lvalue 'ControlGroup' in section 'Service'
>> [/usr/lib/systemd/system/graphical.target.wants/../user-session at .service:16]
>> Unknown lvalue 'ControlGroupModify' in section 'Service'
>> ==============================================================================================================
>> 
>> If I remove the "ControlGroup" and "ControlGroupModify" entries from
>> user-session at .service, I got these:
>> =======================================
>> Starting user-5000.slice.
>> Created slice user-5000.slice.
>> Starting User Manager for 5000...
>> Starting Session c1 of user app.
>> Started Session c1 of user app.
>> Failed to start Start the av system.
>> Unit avsystem.service entered failed state.
>> Started Generate environment from /etc/profile.d.
>> Starting user-5000.slice.
>> Created slice user-5000.slice.
>> Starting User Manager for 5000...
>> Starting Session c1 of user app.
>> Started Session c1 of user app.
>> pam_unix(login:session): session opened for user app by (uid=0)
>> Failed to create root cgroup hierarchy: Permission denied
>> Failed to create root cgroup hierarchy: Permission denied
>> Failed to allocate manager object: Permission denied
>> Failed to create root cgroup hierarchy: Permission denied
>> Failed to create root cgroup hierarchy: Permission denied
>
> It costs me several hours to debug why systemd user session fail to
> start.
>
> Even I created these cgroups and chmod their files to 777, it less
> permission to write, so the "systemd --user" fail with "Permission
> denied".
>
> The workaround so far is add kernel cmdline option "security=none".

What version of systemd do you use?  What kernel? If it is mobile kernel
and systemd-208 it won't work. New systemd needs some features not
present in the mobile kernel. I've back-ported some patches and I will
push them to the mobile

Please refer to my discussion with Casey.
-- 
Łukasz Stelmach
Samsung R&D Institute Poland
Samsung Electronics
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