This is in preparation for only handling kmem pages in
__split_huge_page().
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
mm/huge_memory.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index f92068864469..44d25a74b611 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -3234,6 +3234,10 @@ static void __split_huge_page_tail(struct folio *folio, int tail,
folio_set_large_rmappable(new_folio);
}
+#ifdef CONFIG_MEMCG
+ new_folio->memcg_data = folio->memcg_data;
+#endif
+
/* Finally unfreeze refcount. Additional reference from page cache. */
page_ref_unfreeze(page_tail,
1 + ((!folio_test_anon(folio) || folio_test_swapcache(folio)) ?
@@ -3267,8 +3271,11 @@ static void __split_huge_page(struct page *page, struct list_head *list,
int order = folio_order(folio);
unsigned int nr = 1 << order;
- /* complete memcg works before add pages to LRU */
- split_page_memcg(head, order, new_order);
+#ifdef CONFIG_MEMCG
+ if (folio_memcg_charged(folio))
+ css_get_many(&folio_memcg(folio)->css,
+ (1 << (order - new_order)) - 1);
+#endif
if (folio_test_anon(folio) && folio_test_swapcache(folio)) {
offset = swap_cache_index(folio->swap);
--
2.43.0
