On Fri, Dec 06, 2024 at 02:27:36PM -0800, Shakeel Butt wrote: > For anon memory or specifically THPs allocation, we can tune though > sysctls to be less aggressive but there is infrastructure like > khugepaged which in background converts small pages into THPs. I can > imagine that we might want something similar for filesystem as well. khugepaged also works on files. Where Somebody Needs To Do Something is that right now it gives up if it sees large folios (because it was written when there were two sizes of folio -- order 0 and PMD_ORDER). Nobody has yet taken on making it turn order-N folios into PMD_ORDER folios. Perhaps you'd like to do that?
