On Wed, Apr 17, 2024 at 04:55:55PM +0100, Matthew Wilcox wrote: > 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" I checked it. Indeed. Thanks for the information. Byungchul
