[PATCH slab/for-next 07/14] arm64/mm: specify SLAB_MAY_ACCOUNT for pgd_cache
From: Harry Yoo (Meta)
Date: Wed Oct 21 2026 - 07:55:02 EST
When PGD_SIZE != PAGE_SIZE, user PGDs are allocated from pgd_cache
with GFP_PGTABLE_USER, which includes __GFP_ACCOUNT. Specify
SLAB_MAY_ACCOUNT when the object may be charged to a memcg.
__GFP_ACCOUNT without SLAB_MAY_ACCOUNT will not be allowed.
Path (e.g. 64K pages): copy_process() -> mm_init() -> pgd_alloc()
-> kmem_cache_alloc(pgd_cache, GFP_PGTABLE_USER)
Assisted-by: LLM
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Harry Yoo (Meta) <harry@xxxxxxxxxx>
---
arch/arm64/mm/pgd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/mm/pgd.c b/arch/arm64/mm/pgd.c
index bf5110b91e2f..0fd5b90b5160 100644
--- a/arch/arm64/mm/pgd.c
+++ b/arch/arm64/mm/pgd.c
@@ -63,5 +63,5 @@ void __init pgtable_cache_init(void)
* Naturally aligned pgds required by the architecture.
*/
pgd_cache = kmem_cache_create("pgd_cache", PGD_SIZE, PGD_SIZE,
- SLAB_PANIC, NULL);
+ SLAB_PANIC | SLAB_MAY_ACCOUNT, NULL);
}
--
2.54.0