Docker failing to start some containers with memory limit using systemd for cgroup

[rawouter]

As discussed with @philips, ccing @crawford

Reporting moby/moby#19406 bug with rapid container creation/deletion using systemd exec driver for cgroup. Some containers will fail starting with the following error if memory limit was set:

core@server ~ $ for i in {1..10}; do docker run -i --rm --memory=1g tianon/true; done
Error response from daemon: Cannot start container df673f834ef10b20ad8fb04b2ae70f2ec70a63fd653f3a451bd9d9d724b6fb57: [8] System error: write /sys/fs/cgroup/memory/system.slice/docker-df673f834ef10b20ad8fb04b2ae70f2ec70a63fd653f3a451bd9d9d724b6fb57.scope/memory.memsw.limit_in_bytes: invalid argument

[crawford]

We have since switched back to cgroupfs as the default for native.cgroupdriver. I'm going to go ahead and close this out.