diff options
author | Suren Baghdasaryan <surenb@google.com> | 2022-07-31 11:19:31 -0700 |
---|---|---|
committer | Suren Baghdasaryan <surenb@google.com> | 2022-11-04 19:47:25 +0000 |
commit | 42c183a9a53e1af33caed4aa8167d35bef6fceb8 (patch) | |
tree | 288c64b8ffe665cc5a66ba85f2e6d8507222e9fb | |
parent | f5f6b4cd4eeecf6852397c3eeab722732a90166f (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 d88c46ca82e1..a2cba1d20b86 100644 --- a/include/linux/gfp_types.h +++ b/include/linux/gfp_types.h @@ -55,8 +55,13 @@ typedef unsigned int __bitwise gfp_t; #define ___GFP_SKIP_KASAN_UNPOISON 0 #define ___GFP_SKIP_KASAN_POISON 0 #endif +#ifdef CONFIG_SLAB_OBJ_EXT +#define ___GFP_NO_OBJ_EXT 0x8000000u +#else +#define ___GFP_NO_OBJ_EXT 0 +#endif #ifdef CONFIG_LOCKDEP -#define ___GFP_NOLOCKDEP 0x8000000u +#define ___GFP_NOLOCKDEP 0x10000000u #else #define ___GFP_NOLOCKDEP 0 #endif @@ -101,12 +106,15 @@ 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 @@ -256,7 +264,7 @@ typedef unsigned int __bitwise gfp_t; #define __GFP_NOLOCKDEP ((__force gfp_t)___GFP_NOLOCKDEP) /* Room for N __GFP_FOO bits */ -#define __GFP_BITS_SHIFT (27 + IS_ENABLED(CONFIG_LOCKDEP)) +#define __GFP_BITS_SHIFT (28 + IS_ENABLED(CONFIG_LOCKDEP)) #define __GFP_BITS_MASK ((__force gfp_t)((1 << __GFP_BITS_SHIFT) - 1)) /** |