Remove a hidden call to compound_head(), and account nr_pages instead
of a single page. This matches the code in lru_lazyfree_fn() that
accounts nr_pages to PGLAZYFREE.
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
include/linux/memcontrol.h | 14 ++++++++++++++
mm/vmscan.c | 18 +++++++++---------
2 files changed, 23 insertions(+), 9 deletions(-)
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 89b14729d59f..06a16c82558b 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -1061,6 +1061,15 @@ static inline void count_memcg_page_event(struct page *page,
count_memcg_events(memcg, idx, 1);
}
+static inline void count_memcg_folio_events(struct folio *folio,
+ enum vm_event_item idx, unsigned long nr)
+{
+ struct mem_cgroup *memcg = folio_memcg(folio);
+
+ if (memcg)
+ count_memcg_events(memcg, idx, nr);
+}
+
static inline void count_memcg_event_mm(struct mm_struct *mm,
enum vm_event_item idx)
{
@@ -1498,6 +1507,11 @@ static inline void count_memcg_page_event(struct page *page,
{
}
+static inline void count_memcg_folio_events(struct folio *folio,
+ enum vm_event_item idx, unsigned long nr)
+{
+}
+
static inline
void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx)
{
diff --git a/mm/vmscan.c b/mm/vmscan.c
index cda43f0bb285..0368ea3e9880 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1883,20 +1883,20 @@ static unsigned int shrink_page_list(struct list_head *page_list,
}
}
- if (PageAnon(page) && !PageSwapBacked(page)) {
+ if (folio_test_anon(folio) && !folio_test_swapbacked(folio)) {
/* follow __remove_mapping for reference */
- if (!page_ref_freeze(page, 1))
+ if (!folio_ref_freeze(folio, 1))
goto keep_locked;
/*
- * The page has only one reference left, which is
+ * The folio has only one reference left, which is
* from the isolation. After the caller puts the
- * page back on lru and drops the reference, the
- * page will be freed anyway. It doesn't matter
- * which lru it goes. So we don't bother checking
- * PageDirty here.
+ * folio back on the lru and drops the reference, the
+ * folio will be freed anyway. It doesn't matter
+ * which lru it goes on. So we don't bother checking
+ * the dirty flag here.
*/
- count_vm_event(PGLAZYFREED);
- count_memcg_page_event(page, PGLAZYFREED);
+ count_vm_events(PGLAZYFREED, nr_pages);
+ count_memcg_folio_events(folio, PGLAZYFREED, nr_pages);
} else if (!mapping || !__remove_mapping(mapping, folio, true,
sc->target_mem_cgroup))
goto keep_locked;
--
2.34.1
