Description of problem: Requesting https://review.opendev.org/#/c/699861/ to be backported to OSP13 so cinder volume restart using NFS driver is faster. Without this it can take 45m to restart cinder volume; resulting in downtime for the users. Version-Release number of selected component (if applicable): OSP13 How reproducible: 100% Steps to Reproduce: 1. have lots of nfs volumes 2. restart cinder volume service 3. notice long time for volume service to come back up Actual results: long time for cinder volume to restart Expected results: cinder volume service restarts quickly Additional info: