File system format for persistent memory

A non-transitory machine readable medium comprising instructions for performing a method, which when executed by a machine, causes the machine to perform operations comprising:

• storing, by a persistent memory file system of a node, pages of data within persistent memory;
• scavenging a page of data within the persistent memory to free the page for storing different data;
• and
• increasing a generation count as an increased generation count to indicate that the page was scavenged to invalidate references within indirect pages to the page based upon generation counts within the indirect pages not matching the increased generation count, wherein the generation count is used to track a number of times the page is scavenged.

A computing device comprising:

• a memory comprising machine executable code;
• and
• a processor coupled to the memory, the processor configured to execute the machine executable code to perform operations comprising:
• storing, by a persistent memory file system of a node, pages of data within persistent memory;
• scavenging a page of data within the persistent memory to free the page for storing different data;
• and
• increasing a generation count as an increased generation count to indicate that the page was scavenged to invalidate references within indirect pages to the page based upon generation counts within the indirect pages not matching the increased generation count, wherein the generation count is used to track a number of times the page is scavenged.