Virtual machine memory overcommit by reverse ballooning

A method comprising:

• exposing, by a hypervisor, an initialization memory to a guest operating system of a virtual machine;
• initializing, by the hypervisor, the guest OS;
• exposing, by the hypervisor, a device memory to the guest OS;
• querying, by a device driver, an amount of memory available from the device memory;
• and
• reporting, by the device driver, the amount of memory available to the guest OS.

A non-transitory machine readable medium storing code, which when executed by a processor, is configured to:

• expose an initialization memory to a guest operating system of a virtual machine;
• initialize the guest OS;
• expose a device memory to the guest OS;
• query an amount of memory available from the device memory;
• and
• report the amount of memory available to the guest OS.