Post Syndicated from corbet original https://lwn.net/Articles/974515/

For every page of memory in the system, the kernel maintains a set of page
flags describing how the page is used and various aspects of its current
state. Space for page flags has been in chronic short supply, leading to a desire to
eliminate or consolidate them whenever possible. That objective, though,
is hampered by the fact that the purpose of many page flags is not well
understood. In a memory-management-track session at the 2024 Linux Storage,
Filesystem, Memory-Management and BPF Summit, Matthew Wilcox set out to
cooperatively update the page-flag documentation to improve that situation.