I'm not sure when a new AMI build is scheduled, but you can 'sudo apt install linux-aws' currently in an existing xenial instance to upgrade to the AWS-specific kernel that has xen ballooning disabled, which fixes this problem.
I'm not sure when a new AMI build is scheduled, but you can 'sudo apt install linux-aws' currently in an existing xenial instance to upgrade to the AWS-specific kernel that has xen ballooning disabled, which fixes this problem.