[$] Measuring memory fragmentation

In the final session in the memory-management track of the 2024 Linux Storage,Filesystem, Memory-Management and BPF Summit, the exhausted group ofdevelopers looked one more time at the use of huge pages and the associatedproblem of memory fragmentation. At its worst, this problem can make hugepages harder (and more expensive) to allocate. Luis Chamberlain, who ranthe session, felt that people were worried about this problem, but thatthere was little data on how severe it truly is.