Post Syndicated from corbet original https://lwn.net/Articles/1073071/

A major page fault occurs when a process attempts to access a page that is
not currently present in RAM; satisfying such faults usually involves I/O, and can thus take some time. When many threads
sharing an address space are generating page faults, the result can be
significant lock contention while that I/O
takes place. During the memory-management track at the 2026 Linux Storage,
Filesystem, Memory Management, and BPF Summit, Barry Song led a session
to try, yet again, to find an enduring solution to this problem.