On Thu, Aug 15, 2024 at 6:33 AM gaoxu <gaoxu2@xxxxxxxxx> wrote: > > Replace lruvec_add_folio with lruvec_add_folio_tail in the lru_lazyfree_fn: > 1. The lazy-free folio is added to the LRU_INACTIVE_FILE list. If it's > moved to the LRU tail, it allows for faster release lazy-free folio and > reduces the impact on file refault. > 2. When mglru is enabled, the lazy-free folio is reclaimabled and should be > added using lru_gen_add_folio(lruvec, folio, true) instead of > lru_gen_add_folio(lruvec, folio, false) for adding to gen. > > With the change in place, workingset_refault_file is reduced by 33% in the > continuous startup testing of the applications in the Android system. > > Signed-off-by: gao xu <gaoxu2@xxxxxxxxxxx> > --- > mm/swap.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/mm/swap.c b/mm/swap.c > index 67786cb77..ed49643ec 100644 > --- a/mm/swap.c > +++ b/mm/swap.c > @@ -635,7 +635,7 @@ static void lru_lazyfree_fn(struct lruvec *lruvec, struct folio *folio) Please work against the latest mm-unstable. > * anonymous folios > */ > folio_clear_swapbacked(folio); > - lruvec_add_folio(lruvec, folio); > + lruvec_add_folio_tail(lruvec, folio); > > __count_vm_events(PGLAZYFREE, nr_pages); > __count_memcg_events(lruvec_memcg(lruvec), PGLAZYFREE, Kalesh has been working on something similar for lru_deactivate(), and he can help test and review this patch.
