Comment # 1 on bug 1099494 from Stefan Hundhammer

I wouldn't expect anything else than the system hanging in this situation.

- Creating a snapshot for a lot of changes
  -> triggering a snapshot cleanup
- Requesting yet another snapshot while all this is running

What exactly do you expect to happen?

Creating the first snapshot needs more disk space, so that disk space needs to
be cleaned up first. That cleanup takes time, and only after that the first
snapshot can really be started. If then already yet another snapshot is
requested, what should happen?