The list of arguments which can be specified by users is configurable by the site admins with the default list being empty so that this capability is turned off.

A whitelisted prefix can be, for example, "--gres=" to allow users to control SLURMs generic resource scheduling.

• arvados-cwl-runner to be updated to support new Arvados specific CWL extension
• API server to validate the requested arguments against configured white list
• crunch-dispatch-slurm to pass the added arguments through to sbatch
• User documentation updated