Memory snapshot management method and apparatus, and device and medium

An electronic device, comprising:

• one or more memories, configured to store computer readable instructions;
• and
• one or more processors, configured to execute the computer readable instructions to cause the one or more processors to:
• in response to acquiring a memory snapshot generation command, suspend a virtual machine;
• copy a two-level page table of the virtual machine to obtain a first snapshot page table, and set a read-only identifier for each of page table entries of the two-level page table;
• and
• acquire memory pages corresponding to page table entries of the first snapshot page table by means of the page table entries of the first snapshot page table, increase a reference count of each of the memory pages, and restore the virtual machine from a suspended state to a running state.

A non-volatile computer readable storage medium, configured to store computer readable instructions, wherein the computer readable instructions, when being executed by one or more processors, are configured to cause the one or more processors to:

• in response to acquiring a memory snapshot generation command, suspend a virtual machine;
• copy a two-level page table of the virtual machine to obtain a first snapshot page table, and set a read-only identifier for each of page table entries of the two-level page table;
• and
• acquire memory pages corresponding to page table entries of the first snapshot page table by means of the page table entries of the first snapshot page table, increase a reference count of each of the memory pages, and restore the virtual machine from a suspended state to a running state.