US 12,332,748 B1
CXL memory subsystem unavailability recovery system
Navdeeppal Singh, Bengaluru (IN); Guru Prasad Yadav, Bangalore (IN); Swapan Kumar Bhakat, Jaduguda (IN); and Saladhi Parameswara Rao, Bangalore (IN)
Assigned to Dell Products L.P., Round Rock, TX (US)
Filed by Dell Products L.P., Round Rock, TX (US)
Filed on Dec. 14, 2023, as Appl. No. 18/540,103.
Int. Cl. G06F 11/14 (2006.01)
CPC G06F 11/1456 (2013.01) [G06F 2201/85 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A Compute Express Link (CXL) memory subsystem unavailability recovery system, comprising:
a computing device;
a first Compute Express Link (CXL) device that is included in the computing device;
a CXL memory system that is included in the computing device and that includes a plurality of CXL memory subsystems;
a non-volatile memory system that is included in the computing device; and
a CXL memory subsystem unavailability recovery subsystem that is included in the computing device and that is coupled to the CXL device, the CXL memory system, and the non-volatile memory system, wherein the CXL memory subsystem unavailability recovery subsystem is configured to:
configure the first CXL device to use a first CXL memory subsystem included in the CXL memory system;
copy data stored in the first CXL memory subsystem by the first CXL device to the non-volatile memory system to generate back-up data;
determine, during runtime operations for the computing device, that the first CXL memory subsystem is unavailable;
copy, during the runtime operations for the computing device, the back-up data from the non-volatile memory system to a second CXL memory subsystem included in the CXL memory system;
configure, during the runtime operations for the computing device, the first CXL device to use the second CXL memory subsystem and stop using the first CXL memory subsystem without requiring initialization of the computing device subsequent to the determination that the first CXL memory subsystem was unavailable.