From: Chuanhua Han <hanchuanhua@xxxxxxxx> should_try_to_free_swap() works with an assumption that swap-in is always done at normal page granularity, aka, folio_nr_pages = 1. To support large folio swap-in, this patch removes the assumption. Signed-off-by: Chuanhua Han <hanchuanhua@xxxxxxxx> Co-developed-by: Barry Song <v-songbaohua@xxxxxxxx> Signed-off-by: Barry Song <v-songbaohua@xxxxxxxx> --- mm/memory.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/memory.c b/mm/memory.c index 7e1f4849463a..f61a48929ba7 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3714,7 +3714,7 @@ static inline bool should_try_to_free_swap(struct folio *folio, * reference only in case it's likely that we'll be the exlusive user. */ return (fault_flags & FAULT_FLAG_WRITE) && !folio_test_ksm(folio) && - folio_ref_count(folio) == 2; + folio_ref_count(folio) == (1 + folio_nr_pages(folio)); } static vm_fault_t pte_marker_clear(struct vm_fault *vmf) -- 2.34.1
