> - Why bother ioctling the dm control device when we can ioctl > the virtual device directly? > Using the control device is usefull if you want to react on messages from the control interface without the need to open virtual devices at that time or keep filehandles open all the time. Userspace recovery of failed multipath devices has to save as much memory since it must pin itself into memory in order to handle low-mem situations. So I would like to see a interface through the control device as well. Stefan
