I narrowed down (bisected) the cause of the crash in unmount generic/046 (to Windows) which causes the hang on following tests (generic/047 etc). See http://smb311-linux-testing.southcentralus.cloudapp.azure.com/#/builders/3/builds/61/steps/73/logs/stdio as an example. The regression started when I add the patch from 6.5-rc1 "cifs: Add a laundromat thread for cached directories" The workaround is to simply disable directory caching for that mount - ie "nohandlecache" mount parameter. This unmount race is only an issue to servers which support directory leases (e.g. Windows). -- Thanks, Steve
