MGLRU-FG speeds up Linux memory reclamation by up to 40% in early tests

Kairui Song’s MGLRU-FG patches add frequency-guided promotion to Linux’s Multi-Gen LRU and deliver 10–40% gains depending on workload, peaking at 76% under zRAM. The series is still RFC, but the results on MongoDB, Chromium and kernel builds make it worth tracking closely.