--- On Wed, 12/15/10, Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx> wrote:
> From: Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx>
> Subject: Re: cgroup tasks file error
> To: "ccmail111" <ccmail111@xxxxxxxxx>
> Cc: containers@xxxxxxxxxxxxxxxxxxxxxxxxxx
> Date: Wednesday, December 15, 2010, 12:51 PM
> * ccmail111 <ccmail111@xxxxxxxxx>
> [2010-12-14 10:22:32]:
>
> >
> >
> > --- On Tue, 12/14/10, Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx>
> wrote:
> >
> > > From: Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx>
> > > Subject: Re: cgroup tasks file error
> > > To: "ccmail111" <ccmail111@xxxxxxxxx>
> > > Cc: "Jue Hong" <honshj@xxxxxxxxx>,
> containers@xxxxxxxxxxxxxxxxxxxxxxxxxx
> > > Date: Tuesday, December 14, 2010, 12:41 PM
> > > On Tue, Dec 14, 2010 at 11:03 PM,
> > > ccmail111 <ccmail111@xxxxxxxxx>
> > > 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
> > >
> > ----
> >
> > Please find output requested below:
> >
> >
> > [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
> > [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:~]$ echo 575 > /dev/cgroup/tasks
> > -bash: echo: write error: Operation not permitted
> > [host:~]$ cat /dev/cgroup/hello/cpuset.cpus
> > 0
> > [host:~]$ cat /dev/cgroup/hello/cpuset.mems
> > 0
> > [host:~]$ cat /dev/cgroup/cpuset.mems
> > 0
> > [host:~]$ cat /dev/cgroup/cpuset.cpus
> > 0
> > [host:~]$ ls -al /dev/cgroup/
> > total 0
> > drwxr-xr-x 3 root root 0 Dec 14
> 17:29 .
> > drwxr-xr-x 11 root root 2980 Dec 14 17:29 ..
> > -r--r--r-- 1 root root 0 Dec 14
> 17:29 cgroup.procs
> > -rw-r--r-- 1 root root 0 Dec 14
> 17:29 cpuset.cpu_exclusive
> > -rw-r--r-- 1 root root 0 Dec 14
> 17:29 cpuset.cpus
> > -rw-r--r-- 1 root root 0 Dec 14
> 17:29 cpuset.mem_exclusive
> > -rw-r--r-- 1 root root 0 Dec 14
> 17:29 cpuset.mem_hardwall
> > -rw-r--r-- 1 root root 0 Dec 14
> 17:29 cpuset.memory_migrate
> > -r--r--r-- 1 root root 0 Dec 14
> 17:29 cpuset.memory_pressure
> > -rw-r--r-- 1 root root 0 Dec 14
> 17:29 cpuset.memory_pressure_enabled
> > -rw-r--r-- 1 root root 0 Dec 14
> 17:29 cpuset.memory_spread_page
> > -rw-r--r-- 1 root root 0 Dec 14
> 17:29 cpuset.memory_spread_slab
> > -rw-r--r-- 1 root root 0 Dec 14
> 17:29 cpuset.mems
> > -rw-r--r-- 1 root root 0 Dec 14
> 17:29 cpuset.sched_load_balance
> > -rw-r--r-- 1 root root 0 Dec 14
> 17:29 cpuset.sched_relax_domain_level
> > drwxr-xr-x 2 root root 0 Dec 14
> 17:29 hello
> > -rw-r--r-- 1 root root 0 Dec 14
> 17:29 notify_on_release
> > -rw-r--r-- 1 root root 0 Dec 14
> 17:29 release_agent
> > -rw-r--r-- 1 root root 0 Dec 14
> 17:31 tasks
> > [host:~]$ ls -al /dev/cgroup/hello/
> > total 0
> > drwxr-xr-x 2 root root 0 Dec 14 17:29 .
> > drwxr-xr-x 3 root root 0 Dec 14 17:29 ..
> > -r--r--r-- 1 root root 0 Dec 14 17:29 cgroup.procs
> > -rw-r--r-- 1 root root 0 Dec 14 17:29
> cpuset.cpu_exclusive
> > -rw-r--r-- 1 root root 0 Dec 14 17:30 cpuset.cpus
> > -rw-r--r-- 1 root root 0 Dec 14 17:29
> cpuset.mem_exclusive
> > -rw-r--r-- 1 root root 0 Dec 14 17:29
> cpuset.mem_hardwall
> > -rw-r--r-- 1 root root 0 Dec 14 17:29
> cpuset.memory_migrate
> > -r--r--r-- 1 root root 0 Dec 14 17:29
> cpuset.memory_pressure
> > -rw-r--r-- 1 root root 0 Dec 14 17:29
> cpuset.memory_spread_page
> > -rw-r--r-- 1 root root 0 Dec 14 17:29
> cpuset.memory_spread_slab
> > -rw-r--r-- 1 root root 0 Dec 14 17:30 cpuset.mems
> > -rw-r--r-- 1 root root 0 Dec 14 17:29
> cpuset.sched_load_balance
> > -rw-r--r-- 1 root root 0 Dec 14 17:29
> cpuset.sched_relax_domain_level
> > -rw-r--r-- 1 root root 0 Dec 14 17:29
> notify_on_release
> > -rw-r--r-- 1 root root 0 Dec 14 17:30 tasks
> > [host:~]$ id
> > uid=0(root) gid=0(root) groups=0(root)
> > [host:~]$
> >
>
> Looks like Serge's ns suggestion solved your problem,
> right?
>
> --
> Three Cheers,
> Balbir
>
Yes, Balbir, thats right.
IMHO, it would nice if it can be documented on wiki or such.
Thanks everyone for suggestions..
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