diff options
| author | Suren Baghdasaryan <surenb@google.com> | 2022-07-31 11:19:31 -0700 |
|---|---|---|
| committer | Suren Baghdasaryan <surenb@google.com> | 2023-04-30 22:55:27 +0000 |
| commit | 4de3e17410b3cb29228159d6d8a19f252db3ca58 (patch) | |
| tree | d30dc0bf57d6b4d8942cc650161cd104163e182b | |
| parent | cb53d9d5951216e23b9c2e3a242e1c463d4106b3 (diff) | |
mm: introduce __GFP_NO_OBJ_EXT flag to selectively prevent slabobj_ext creation
Introduce __GFP_NO_OBJ_EXT flag in order to prevent recursive allocations
when allocating slabobj_ext on a slab.
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
| -rw-r--r-- | include/linux/gfp_types.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/include/linux/gfp_types.h b/include/linux/gfp_types.h index 6583a58670c5..aab1959130f9 100644 --- a/include/linux/gfp_types.h +++ b/include/linux/gfp_types.h @@ -53,8 +53,13 @@ typedef unsigned int __bitwise gfp_t; #define ___GFP_SKIP_ZERO 0 #define ___GFP_SKIP_KASAN 0 #endif +#ifdef CONFIG_SLAB_OBJ_EXT +#define ___GFP_NO_OBJ_EXT 0x4000000u +#else +#define ___GFP_NO_OBJ_EXT 0 +#endif #ifdef CONFIG_LOCKDEP -#define ___GFP_NOLOCKDEP 0x4000000u +#define ___GFP_NOLOCKDEP 0x8000000u #else #define ___GFP_NOLOCKDEP 0 #endif @@ -99,12 +104,15 @@ typedef unsigned int __bitwise gfp_t; * node with no fallbacks or placement policy enforcements. * * %__GFP_ACCOUNT causes the allocation to be accounted to kmemcg. + * + * %__GFP_NO_OBJ_EXT causes slab allocation to have no object extension. */ #define __GFP_RECLAIMABLE ((__force gfp_t)___GFP_RECLAIMABLE) #define __GFP_WRITE ((__force gfp_t)___GFP_WRITE) #define __GFP_HARDWALL ((__force gfp_t)___GFP_HARDWALL) #define __GFP_THISNODE ((__force gfp_t)___GFP_THISNODE) #define __GFP_ACCOUNT ((__force gfp_t)___GFP_ACCOUNT) +#define __GFP_NO_OBJ_EXT ((__force gfp_t)___GFP_NO_OBJ_EXT) /** * DOC: Watermark modifiers @@ -249,7 +257,7 @@ typedef unsigned int __bitwise gfp_t; #define __GFP_NOLOCKDEP ((__force gfp_t)___GFP_NOLOCKDEP) /* Room for N __GFP_FOO bits */ -#define __GFP_BITS_SHIFT (26 + IS_ENABLED(CONFIG_LOCKDEP)) +#define __GFP_BITS_SHIFT (27 + IS_ENABLED(CONFIG_LOCKDEP)) #define __GFP_BITS_MASK ((__force gfp_t)((1 << __GFP_BITS_SHIFT) - 1)) /** |