mhahn said there was a bug in Yocto sshd killing all current cgroup processes when leaving ssh which has an easy fix (just didn't make it to the Edison build yet): poky - Poky Build Tool and Metadata i.e. in short:
echo "KillMode=process" >> /lib/systemd/system/[email protected] https://communities.intel.com/thread/57402?start=15&tstart=0
