[Devel] Re: Freezer cgroup Failed

[Matt Helsley]

On Thu, Jun 10, 2010 at 01:45:05PM +0900, Jerf gefera wrote:
> Dear there,
> The self_checkpoint and self_restart are working now, but why external
> checkpoint cannot work.I did it like the following two ways:
> 1)     $./onetask &
>     $./checkpoint 4347 >img
>     checkpoint: Device or resource busy
>     (you may use 'ckptinfo -e' for more info)
> 
> And the content in the image file is "[Error at do_checkpoint:583][err
> -16]Freezer cgroup failed"

(You need to freeze it as you're trying to do below...)

> 2)     $./onetask &
>       $.echo 4354 > /cgroup/0/tasks
>     $echo FROZEN > /cgroup/0/freezer.state
>     $./checkpoint 4354 > ckpt.image
>     checkpoint: Device or resource busy
>     (you may use 'ckptinfo -e' for more info)
> And the content in the image file is "[Error at do_checkpoint:583][err
> -16]Freezer cgoup failed"
> The content in freezer.state is "FROZEN". I do not know what is wrong, can
> anyone can give me a hand.

You verified that the task shows up in /cgroup/0/tasks? (I ask because you
can't move a task into an already-frozen cgroup)

Are you still using v19?

Cheers,
	-Matt Helsley
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