[Lxc-users] Problem with pthread_create SCHED_RR - Operation not permitted

[Daniel Lezcano]

On 07/03/2012 02:29 PM, Hans Feldt wrote:
> Thanks for looking into it.
>
> It means some applications cannot run unmodified in a container then?

Did you try by mounting the cgroup but without the 'cpu' subsystem ?

  -- Daniel

>
> /Hans
>
> On 07/02/12 19:08, Serge Hallyn wrote:
>> This appears to be a cgroup issue (presumably by design).  Without involving
>> lxc, just do
>>
>> sudo bash
>> # mkdir /sys/fs/cgroup/cpu/1
>> # echo $$ > /sys/fs/cgroup/cpu/1/tasks
>> # (run your test)
>> pthread_create failed - Operation not permitted
>>
>> -serge
>>
>> Quoting Serge Hallyn (serge.hallyn at canonical.com):
>>> Quoting Hans Feldt (Hans.Feldt at ericsson.com):
>>>> Hi,
>>>>
>>>> As the subject says, pthread_create for SCHED_RR fails with EPERM(1) in my
>>>> container. Program run as root.
>>>>
>>>> Same program run directly on host works. I tried disabling the apparmor stuff
>>>> but no luck.
>>>>
>>>> host: ubuntu 12.04
>>>> container: generated with the "ubuntu" template
>>>>
>>>> Any ideas?
>>> Hm, everything I see in the kernel source suggests that CAP_SYS_NICE should
>>> suffice.  (I assume you didn't add that to lxc.cap_drop)  But I don't have
>>> a solid grasp of the the autogroup code under kernel/sched.
>>>
>>> ------------------------------------------------------------------------------
>>> Live Security Virtual Conference
>>> Exclusive live event will cover all the ways today's security and
>>> threat landscape has changed and how IT managers can respond. Discussions
>>> will include endpoint security, mobile security and the latest in malware
>>> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
>>> _______________________________________________
>>> Lxc-users mailing list
>>> Lxc-users at lists.sourceforge.net
>>> https://lists.sourceforge.net/lists/listinfo/lxc-users
>>
>
>
> ------------------------------------------------------------------------------
> Live Security Virtual Conference
> Exclusive live event will cover all the ways today's security and 
> threat landscape has changed and how IT managers can respond. Discussions 
> will include endpoint security, mobile security and the latest in malware 
> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
> _______________________________________________
> Lxc-users mailing list
> Lxc-users at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/lxc-users
>