[Devel] Re: container userspace tools

[Balbir Singh]

* Ian jonhson <jonhson.ian at gmail.com> [2008-12-12 17:06:21]:

> > With what version of the kernel due you see this problem. The memory
> > controller is undergoing a churn and I think we found something that
> > potentially breaks the memory controller in the current -mm. To verify
> >
> I am not sure whether the -mm is opened. I just opened the options as
> said in REAEME of lxc-0.3.0. And, the kernel version in my VM is:
> 2.6.27-rc8.
>

OK, so this is not an lxc kernel, but a mainline kernel.
 
> 
> > 1. Can you see the memory.usage_in_bytes corresponding to the control
> > group where you run the container
> 
> How can I know the number correspond to the control group?

>From outside the container, figure out the process id of init and then
do a cat /proc/<pid>/cgroup. Then go to that directory and cat
memory.usage_in_bytes, memory.stat and memory.limit_in_bytes to verify
the setup

> 
> > 2. Check tasks file to see that the container tasks are indeed in the
> > container.
> >
> 
> My program forks a child and its child (grandson of previous process) call the
> the /bin/bash to open a shell. I just can find the parent process is
> in container
> tasks file, but its child and grandson process are not.
>

Hmmm.. but the child and grandson are alive right? Do a cat
/proc/<pid>/cgroup on them to see where they went or where they are. 

-- 
	Balbir
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