Certain topics return predictably to development conferences every year,
usually because developers are still struggling to find a viable solution
to a specific problem. One such topic is the lack of scalability in the
kernel’s page-fault-handling code, so it was no surprise to see this
problem on the agenda for the 2023 Linux
Storage, Filesystem, Memory-Management and BPF Summit. Matthew Wilcox
led a session in the memory-management track to discuss the state of
page-fault handling and what can be done to improve it further.

Source: LWN.net – [$] Improving page-fault scalability