walk->can_swap might be invalid since it's not guaranteed to be
initialized for the particular lruvec. Instead deduce it from the folio
type (anon/file).
Fixes: 018ee47f1489 ("mm: multi-gen LRU: exploit locality in rmap")
Cc: Yu Zhao <yuzhao@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Kalesh Singh <kaleshsingh@xxxxxxxxxx>
---
Changes in v2:
- Add Fixes tag
mm/vmscan.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 6eecd291756c..b4329f93a682 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -4656,6 +4656,7 @@ void lru_gen_look_around(struct page_vma_mapped_walk *pvmw)
pte_t *pte = pvmw->pte;
unsigned long addr = pvmw->address;
struct folio *folio = pfn_folio(pvmw->pfn);
+ bool can_swap = !folio_is_file_lru(folio);
struct mem_cgroup *memcg = folio_memcg(folio);
struct pglist_data *pgdat = folio_pgdat(folio);
struct lruvec *lruvec = mem_cgroup_lruvec(memcg, pgdat);
@@ -4704,7 +4705,7 @@ void lru_gen_look_around(struct page_vma_mapped_walk *pvmw)
if (!pte_young(ptent))
continue;
- folio = get_pfn_folio(pfn, memcg, pgdat, !walk || walk->can_swap);
+ folio = get_pfn_folio(pfn, memcg, pgdat, can_swap);
if (!folio)
continue;
--
2.41.0.255.g8b1d071c50-goog
