[Devel] Re: cgroup tasks file error
Balbir Singh
balbir at linux.vnet.ibm.com
Tue Dec 14 09:41:30 PST 2010
On Tue, Dec 14, 2010 at 11:03 PM, ccmail111 <ccmail111 at yahoo.com> wrote:
>
> Isn't ns mounted by default ?
> I rebooted machine,
> based on 2.6.32 kernel.
>
> Then,
>
> [host:~]$ mkdir /dev/cgroup
> [host:~]$ mount -t cgroup cpuset -ocpuset,ns /dev/cgroup
> [host:~]$ ps aux | grep libvirt
> root 575 0.6 0.9 88816 2216 ? Sl 17:28 0:00 myproc --daemon
> root 654 0.0 0.2 4044 664 ttyS0 S+ 17:29 0:00 grep libvirt
> [host:~]$ mkdir /dev/cgroup/hello
> [host:~]$ cat /dev/cgroup/hello/tasks
> [host:~]$ echo 0 > /dev/cgroup/hello/cpuset.cpus
> [host:~]$ echo 0 > /dev/cgroup/hello/cpuset.mems
Can you paste the output of
cat /dev/cgroup/hello/cpuset.cpus and mems.
Also please paste the o/p of /dev/cgroup/cpuset.cpus and mems
> [host:~]$ echo 575 > /dev/cgroup/hello/tasks
> [host:~]$ cat /dev/cgroup/hello/tasks
> 575
> [host:~]$ id
> uid=0(root) gid=0(root) groups=0(root)
> [host:~]$
>
> Now, I try to move the task out - the parent/root:
>
> [host:~]$ echo 575 > /dev/cgroup/tasks
> -bash: echo: write error: Operation not permitted
can you send us the o/p of
ls -al /dev/cgroup
and ls -al /dev/cgroup/hello
Balbir
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