distributed process group migration problem

Hello,

A process group distributed over several nodes cannot be migrated at 
once. Consider the following scenario:

1. Run a group of processes on node no. 1.
2. Migrate one or more processes to node no. 2.
3. Try to migrate the whole process group to node no. 3 (migrate 3 
-$pid_of_group_leader).

The only processes that get migrated are the ones that reside on the 
same node as the group leader. The remaining processes are not moved.

Is this normal behaviour or a bug?

I am using OpenSSI 1.2.2 for Debian.

Note: This feature would be really helpful for me. Is there a technical 
reason why it has not been implemented? (I am familiar with the 
Linux/OpenSSI kernel and I would appreciate a detailed technical answer).

Best regards,
Alex


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