diff mbox series

[v3,19/25] memcontrol-v1: Ignore ZONE_DEVICE pages

Message ID 86b1894c81725688cc54afc8019ebb3cb3b6dae4.1732239628.git-series.apopple@nvidia.com (mailing list archive)
State Not Applicable, archived
Headers show
Series fs/dax: Fix ZONE_DEVICE page reference counts | expand

Commit Message

Alistair Popple Nov. 22, 2024, 1:40 a.m. UTC 
memcontrol currently ignores device dax and fs dax pages because these
pages are considered special. To maintain existing behaviour once
these pages are treated as normal pages and returned from
vm_normal_page() add a test to explicitly skip charging them.

Signed-off-by: Alistair Popple <apopple@nvidia.com>
---
 mm/memcontrol-v1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/mm/memcontrol-v1.c b/mm/memcontrol-v1.c
index 81d8819..b10a095 100644
--- a/mm/memcontrol-v1.c
+++ b/mm/memcontrol-v1.c
@@ -667,7 +667,7 @@  static struct page *mc_handle_present_pte(struct vm_area_struct *vma,
 {
 	struct page *page = vm_normal_page(vma, addr, ptent);
 
-	if (!page)
+	if (!page || is_device_dax_page(page) || is_fsdax_page(page))
 		return NULL;
 	if (PageAnon(page)) {
 		if (!(mc.flags & MOVE_ANON))