On Wed, Apr 17, 2024 at 04:18:46PM +0900, Byungchul Park wrote: > Introduced a new API, folio_put_mgen(), to deliver migrc's generation > number to pcp or buddy that will be used by migrc mechanism to track > need of tlb flush for each page residing in pcp or buddy. > > migrc makes decision whether tlb flush is needed or not, based on a > generation number stored in the interesting page and the global > generation number, for that tlb flush required has been completed. > > For now, the delivery works only for the following call path but not for > e.g. free_the_page(), __free_pages_ok() and free_unref_page_list() that > are not for releasing source folios during migration: > > folio_put_mgen() > __folio_put_mgen() > __folio_put_small() > free_unref_page() > free_unref_page_commit() > free_one_page() > __free_one_page() You're going to want to rebase this on mm-unstable. __folio_put_small() went away in "mm: combine __folio_put_small, __folio_put_large and __folio_put"
