Os/hypervisor-based persistent memory

A non-transitory computer readable storage medium having stored thereon program code executable by an operating system (OS) or hypervisor running on a computer system, the program code embodying a method for implementing OS or hypervisor-based persistent memory, the method comprising:

• allocating a portion of a volatile memory of the computer system as a persistent memory allocation;
• receiving a signal from a BIOS (Basic Input/Output System) of the computer system indicating an alternating current (AC) power loss or cycle event;
• in response to the signal, saving data in the persistent memory allocation to a nonvolatile backing store;
• and
• upon restoration of AC power to the computer system, restoring the saved data from the nonvolatile backing store to the persistent memory allocation.

A computer system comprising:

• a battery;
• a BIOS (Basic Input/Output System);
• an operating system (OS) or hypervisor;
• a volatile memory;
• and
• a non-transitory computer readable medium having stored thereon program code for implementing OS or hypervisor based persistent memory, the program code causing the OS or hypervisor to:
• allocate a portion of the volatile memory as a persistent memory allocation;
• receive a signal from the BIOS indicating an alternating current (AC) power loss or cycle event;
• in response to the signal, save data in the persistent memory allocation to a nonvolatile backing store;
• and
• upon restoration of AC power to the computer system, restore the saved data from the nonvolatile backing store to the persistent memory allocation.