Methods for dirty page tracking and full memory mirroring redundancy in fault-tolerant servers

摘要

A method of transferring memory from active to standby memory in an FT server system. The method is to reserve a portion of the memory using the BIOS, load and initialize the FT kernel mode driver, and load the FT virtual machine manager containing the second level address translation table SLAT into the reserved memory. Includes, initializing. The method is to track memory access using FTVMM's SLAT in reserved memory, and to track L2 guest memory access by tracking the current guest's SLAT and intercepting hypervisor writes to the SLAT. Including to do. The method is to enter the brownout state by collecting D bits, disabling the processor's cached SLAT conversion entry, and copying the dirty page from active memory to the memory of the second subsystem. Including.