Dynamic I/O virtualization system having guest memory management for mapping virtual addresses managed by process and memory manager (PMM) and dynamic execution context (DEC)

A system, comprising:

• a host computer having an input output virtualization driver, and a host memory;
• a guest computer having a guest file system;
• and
• an emulated input output virtualization device running on the host computer, the emulated input output virtualization device comprising allocated streams, configuration spaces, and a process and memory manager (PMM), wherein the PMM is configured to allocate a chunk of host memory to the emulated input output virtualization device and manage a dynamic execution context (DEC) to complete a remote input output operation from the guest file system.

A computer-implemented method, comprising:

• providing a host computer having an input output virtualization driver, and a host memory, wherein the input output virtualization driver includes a process and memory manager (PMM);
• emulating an input output virtualization device on the host computer;
• allocating a portion of the host memory during a boot phase for exclusive use by the emulated input output virtualization device;
• formatting the portion of host memory for use by the emulated input output virtualization device;
• determining whether the memory consumption of the host computer is below a critical level;
• reclaiming the portion of the host memory allocated to the emulated input output virtualization device;
• and
• allocating the reclaimed host memory to the host computer.