[PATCH slab/for-next 07/14] arm64/mm: specify SLAB_MAY_ACCOUNT for pgd_cache

[Harry Yoo (Meta)]

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 at arm.com>
Cc: Will Deacon <will at kernel.org>
Cc: Mark Rutland <mark.rutland at arm.com>
Cc: Anshuman Khandual <anshuman.khandual at arm.com>
Cc: linux-arm-kernel at lists.infradead.org
Signed-off-by: Harry Yoo (Meta) <harry at kernel.org>
---
 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