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slab, slub, slob: add slab_flags_t 

Add sparse-checked slab_flags_t for struct kmem_cache::flags (SLAB_POISON,
etc).

SLAB is bloated temporarily by switching to "unsigned long", but only
temporarily.

Link: http://lkml.kernel.org/r/20171021100225.GA22428@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexey Dobriyan 2017-11-15 17:32:18 -08:00 committed by Linus Torvalds
parent a3ba074447
commit d50112edde
15 changed files with 97 additions and 81 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/ecryptfs/main.c
View File

@ -660,7 +660,7 @@ static struct ecryptfs_cache_info {
struct kmem_cache **cache;
const char *name;
size_t size;
unsigned long flags;
slab_flags_t flags;
void (*ctor)(void *obj);
} ecryptfs_cache_infos[] = {
{

2
fs/xfs/kmem.h
View File

@ -104,7 +104,7 @@ kmem_zone_init(int size, char *zone_name)
}
static inline kmem_zone_t *
kmem_zone_init_flags(int size, char *zone_name, unsigned long flags,
kmem_zone_init_flags(int size, char *zone_name, slab_flags_t flags,
void (*construct)(void *))
{
return kmem_cache_create(zone_name, size, 0, flags, construct);

4
include/linux/kasan.h
View File

@ -46,7 +46,7 @@ void kasan_alloc_pages(struct page *page, unsigned int order);
void kasan_free_pages(struct page *page, unsigned int order);
void kasan_cache_create(struct kmem_cache *cache, size_t *size,
unsigned long *flags);
slab_flags_t *flags);
void kasan_cache_shrink(struct kmem_cache *cache);
void kasan_cache_shutdown(struct kmem_cache *cache);
@ -95,7 +95,7 @@ static inline void kasan_free_pages(struct page *page, unsigned int order) {}
static inline void kasan_cache_create(struct kmem_cache *cache,
size_t *size,
unsigned long *flags) {}
slab_flags_t *flags) {}
static inline void kasan_cache_shrink(struct kmem_cache *cache) {}
static inline void kasan_cache_shutdown(struct kmem_cache *cache) {}

8
include/linux/kmemleak.h
View File

@ -48,14 +48,14 @@ extern void kmemleak_not_leak_phys(phys_addr_t phys) __ref;
extern void kmemleak_ignore_phys(phys_addr_t phys) __ref;
static inline void kmemleak_alloc_recursive(const void *ptr, size_t size,
int min_count, unsigned long flags,
int min_count, slab_flags_t flags,
gfp_t gfp)
{
if (!(flags & SLAB_NOLEAKTRACE))
kmemleak_alloc(ptr, size, min_count, gfp);
}
static inline void kmemleak_free_recursive(const void *ptr, unsigned long flags)
static inline void kmemleak_free_recursive(const void *ptr, slab_flags_t flags)
{
if (!(flags & SLAB_NOLEAKTRACE))
kmemleak_free(ptr);
@ -76,7 +76,7 @@ static inline void kmemleak_alloc(const void *ptr, size_t size, int min_count,
{
}
static inline void kmemleak_alloc_recursive(const void *ptr, size_t size,
int min_count, unsigned long flags,
int min_count, slab_flags_t flags,
gfp_t gfp)
{
}
@ -94,7 +94,7 @@ static inline void kmemleak_free(const void *ptr)
static inline void kmemleak_free_part(const void *ptr, size_t size)
{
}
static inline void kmemleak_free_recursive(const void *ptr, unsigned long flags)
static inline void kmemleak_free_recursive(const void *ptr, slab_flags_t flags)
{
}
static inline void kmemleak_free_percpu(const void __percpu *ptr)

60
include/linux/slab.h
View File

@ -21,13 +21,20 @@
* Flags to pass to kmem_cache_create().
* The ones marked DEBUG are only valid if CONFIG_DEBUG_SLAB is set.
*/
#define SLAB_CONSISTENCY_CHECKS 0x00000100UL /* DEBUG: Perform (expensive) checks on alloc/free */
#define SLAB_RED_ZONE 0x00000400UL /* DEBUG: Red zone objs in a cache */
#define SLAB_POISON 0x00000800UL /* DEBUG: Poison objects */
#define SLAB_HWCACHE_ALIGN 0x00002000UL /* Align objs on cache lines */
#define SLAB_CACHE_DMA 0x00004000UL /* Use GFP_DMA memory */
#define SLAB_STORE_USER 0x00010000UL /* DEBUG: Store the last owner for bug hunting */
#define SLAB_PANIC 0x00040000UL /* Panic if kmem_cache_create() fails */
/* DEBUG: Perform (expensive) checks on alloc/free */
#define SLAB_CONSISTENCY_CHECKS ((slab_flags_t __force)0x00000100UL)
/* DEBUG: Red zone objs in a cache */
#define SLAB_RED_ZONE ((slab_flags_t __force)0x00000400UL)
/* DEBUG: Poison objects */
#define SLAB_POISON ((slab_flags_t __force)0x00000800UL)
/* Align objs on cache lines */
#define SLAB_HWCACHE_ALIGN ((slab_flags_t __force)0x00002000UL)
/* Use GFP_DMA memory */
#define SLAB_CACHE_DMA ((slab_flags_t __force)0x00004000UL)
/* DEBUG: Store the last owner for bug hunting */
#define SLAB_STORE_USER ((slab_flags_t __force)0x00010000UL)
/* Panic if kmem_cache_create() fails */
#define SLAB_PANIC ((slab_flags_t __force)0x00040000UL)
/*
* SLAB_TYPESAFE_BY_RCU - **WARNING** READ THIS!
*
@ -65,44 +72,51 @@
*
* Note that SLAB_TYPESAFE_BY_RCU was originally named SLAB_DESTROY_BY_RCU.
*/
#define SLAB_TYPESAFE_BY_RCU 0x00080000UL /* Defer freeing slabs to RCU */
#define SLAB_MEM_SPREAD 0x00100000UL /* Spread some memory over cpuset */
#define SLAB_TRACE 0x00200000UL /* Trace allocations and frees */
/* Defer freeing slabs to RCU */
#define SLAB_TYPESAFE_BY_RCU ((slab_flags_t __force)0x00080000UL)
/* Spread some memory over cpuset */
#define SLAB_MEM_SPREAD ((slab_flags_t __force)0x00100000UL)
/* Trace allocations and frees */
#define SLAB_TRACE ((slab_flags_t __force)0x00200000UL)
/* Flag to prevent checks on free */
#ifdef CONFIG_DEBUG_OBJECTS
# define SLAB_DEBUG_OBJECTS 0x00400000UL
# define SLAB_DEBUG_OBJECTS ((slab_flags_t __force)0x00400000UL)
#else
# define SLAB_DEBUG_OBJECTS 0x00000000UL
# define SLAB_DEBUG_OBJECTS ((slab_flags_t __force)0x00000000UL)
#endif
#define SLAB_NOLEAKTRACE 0x00800000UL /* Avoid kmemleak tracing */
/* Avoid kmemleak tracing */
#define SLAB_NOLEAKTRACE ((slab_flags_t __force)0x00800000UL)
/* Don't track use of uninitialized memory */
#ifdef CONFIG_KMEMCHECK
# define SLAB_NOTRACK 0x01000000UL
# define SLAB_NOTRACK ((slab_flags_t __force)0x01000000UL)
#else
# define SLAB_NOTRACK 0x00000000UL
# define SLAB_NOTRACK ((slab_flags_t __force)0x00000000UL)
#endif
/* Fault injection mark */
#ifdef CONFIG_FAILSLAB
# define SLAB_FAILSLAB 0x02000000UL /* Fault injection mark */
# define SLAB_FAILSLAB ((slab_flags_t __force)0x02000000UL)
#else
# define SLAB_FAILSLAB 0x00000000UL
# define SLAB_FAILSLAB ((slab_flags_t __force)0x00000000UL)
#endif
/* Account to memcg */
#if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
# define SLAB_ACCOUNT 0x04000000UL /* Account to memcg */
# define SLAB_ACCOUNT ((slab_flags_t __force)0x04000000UL)
#else
# define SLAB_ACCOUNT 0x00000000UL
# define SLAB_ACCOUNT ((slab_flags_t __force)0x00000000UL)
#endif
#ifdef CONFIG_KASAN
#define SLAB_KASAN 0x08000000UL
#define SLAB_KASAN ((slab_flags_t __force)0x08000000UL)
#else
#define SLAB_KASAN 0x00000000UL
#define SLAB_KASAN ((slab_flags_t __force)0x00000000UL)
#endif
/* The following flags affect the page allocator grouping pages by mobility */
#define SLAB_RECLAIM_ACCOUNT 0x00020000UL /* Objects are reclaimable */
/* Objects are reclaimable */
#define SLAB_RECLAIM_ACCOUNT ((slab_flags_t __force)0x00020000UL)
#define SLAB_TEMPORARY SLAB_RECLAIM_ACCOUNT /* Objects are short-lived */
/*
* ZERO_SIZE_PTR will be returned for zero sized kmalloc requests.
@ -128,7 +142,7 @@ void __init kmem_cache_init(void);
bool slab_is_available(void);
struct kmem_cache *kmem_cache_create(const char *, size_t, size_t,
unsigned long,
slab_flags_t,
void (*)(void *));
void kmem_cache_destroy(struct kmem_cache *);
int kmem_cache_shrink(struct kmem_cache *);

2
include/linux/slab_def.h
View File

@ -20,7 +20,7 @@ struct kmem_cache {
struct reciprocal_value reciprocal_buffer_size;
/* 2) touched by every alloc & free from the backend */
unsigned int flags; /* constant flags */
slab_flags_t flags; /* constant flags */
unsigned int num; /* # of objs per slab */
/* 3) cache_grow/shrink */

2
include/linux/slub_def.h
View File

@ -82,7 +82,7 @@ struct kmem_cache_order_objects {
struct kmem_cache {
struct kmem_cache_cpu __percpu *cpu_slab;
/* Used for retriving partial slabs etc */
unsigned long flags;
slab_flags_t flags;
unsigned long min_partial;
int size; /* The size of an object including meta data */
int object_size; /* The size of an object without meta data */

1
include/linux/types.h
View File

@ -156,6 +156,7 @@ typedef u32 dma_addr_t;
#endif
typedef unsigned __bitwise gfp_t;
typedef unsigned long __bitwise slab_flags_t;
typedef unsigned __bitwise fmode_t;
#ifdef CONFIG_PHYS_ADDR_T_64BIT

2
include/net/sock.h
View File

@ -1105,7 +1105,7 @@ struct proto {
struct kmem_cache *slab;
unsigned int obj_size;
int slab_flags;
slab_flags_t slab_flags;
struct percpu_counter *orphan_count;

2
mm/kasan/kasan.c
View File

@ -337,7 +337,7 @@ static size_t optimal_redzone(size_t object_size)
}
void kasan_cache_create(struct kmem_cache *cache, size_t *size,
unsigned long *flags)
slab_flags_t *flags)
{
int redzone_adjust;
int orig_size = *size;

23
mm/slab.c
View File

@ -252,8 +252,8 @@ static void kmem_cache_node_init(struct kmem_cache_node *parent)
MAKE_LIST((cachep), (&(ptr)->slabs_free), slabs_free, nodeid); \
} while (0)
#define CFLGS_OBJFREELIST_SLAB (0x40000000UL)
#define CFLGS_OFF_SLAB (0x80000000UL)
#define CFLGS_OBJFREELIST_SLAB ((slab_flags_t __force)0x40000000UL)
#define CFLGS_OFF_SLAB ((slab_flags_t __force)0x80000000UL)
#define OBJFREELIST_SLAB(x) ((x)->flags & CFLGS_OBJFREELIST_SLAB)
#define OFF_SLAB(x) ((x)->flags & CFLGS_OFF_SLAB)
@ -441,7 +441,7 @@ static inline struct array_cache *cpu_cache_get(struct kmem_cache *cachep)
* Calculate the number of objects and left-over bytes for a given buffer size.
*/
static unsigned int cache_estimate(unsigned long gfporder, size_t buffer_size,
unsigned long flags, size_t *left_over)
slab_flags_t flags, size_t *left_over)
{
unsigned int num;
size_t slab_size = PAGE_SIZE << gfporder;
@ -1759,7 +1759,7 @@ static void slabs_destroy(struct kmem_cache *cachep, struct list_head *list)
* towards high-order requests, this should be changed.
*/
static size_t calculate_slab_order(struct kmem_cache *cachep,
size_t size, unsigned long flags)
size_t size, slab_flags_t flags)
{
size_t left_over = 0;
int gfporder;
@ -1886,8 +1886,8 @@ static int __ref setup_cpu_cache(struct kmem_cache *cachep, gfp_t gfp)
return 0;
}
unsigned long kmem_cache_flags(unsigned long object_size,
unsigned long flags, const char *name,
slab_flags_t kmem_cache_flags(unsigned long object_size,
slab_flags_t flags, const char *name,
void (*ctor)(void *))
{
return flags;
@ -1895,7 +1895,7 @@ unsigned long kmem_cache_flags(unsigned long object_size,
struct kmem_cache *
__kmem_cache_alias(const char *name, size_t size, size_t align,
unsigned long flags, void (*ctor)(void *))
slab_flags_t flags, void (*ctor)(void *))
{
struct kmem_cache *cachep;
@ -1913,7 +1913,7 @@ __kmem_cache_alias(const char *name, size_t size, size_t align,
}
static bool set_objfreelist_slab_cache(struct kmem_cache *cachep,
size_t size, unsigned long flags)
size_t size, slab_flags_t flags)
{
size_t left;
@ -1936,7 +1936,7 @@ static bool set_objfreelist_slab_cache(struct kmem_cache *cachep,
}
static bool set_off_slab_cache(struct kmem_cache *cachep,
size_t size, unsigned long flags)
size_t size, slab_flags_t flags)
{
size_t left;
@ -1970,7 +1970,7 @@ static bool set_off_slab_cache(struct kmem_cache *cachep,
}
static bool set_on_slab_cache(struct kmem_cache *cachep,
size_t size, unsigned long flags)
size_t size, slab_flags_t flags)
{
size_t left;
@ -2006,8 +2006,7 @@ static bool set_on_slab_cache(struct kmem_cache *cachep,
* cacheline. This can be beneficial if you're counting cycles as closely
* as davem.
*/
int
__kmem_cache_create (struct kmem_cache *cachep, unsigned long flags)
int __kmem_cache_create(struct kmem_cache *cachep, slab_flags_t flags)
{
size_t ralign = BYTES_PER_WORD;
gfp_t gfp;

26
mm/slab.h
View File

@ -21,7 +21,7 @@ struct kmem_cache {
unsigned int object_size;/* The original size of the object */
unsigned int size; /* The aligned/padded/added on size */
unsigned int align; /* Alignment as calculated */
unsigned long flags; /* Active flags on the slab */
slab_flags_t flags; /* Active flags on the slab */
const char *name; /* Slab name for sysfs */
int refcount; /* Use counter */
void (*ctor)(void *); /* Called on object slot creation */
@ -79,13 +79,13 @@ extern const struct kmalloc_info_struct {
unsigned long size;
} kmalloc_info[];
unsigned long calculate_alignment(unsigned long flags,
unsigned long calculate_alignment(slab_flags_t flags,
unsigned long align, unsigned long size);
#ifndef CONFIG_SLOB
/* Kmalloc array related functions */
void setup_kmalloc_cache_index_table(void);
void create_kmalloc_caches(unsigned long);
void create_kmalloc_caches(slab_flags_t);
/* Find the kmalloc slab corresponding for a certain size */
struct kmem_cache *kmalloc_slab(size_t, gfp_t);
@ -93,32 +93,32 @@ struct kmem_cache *kmalloc_slab(size_t, gfp_t);
/* Functions provided by the slab allocators */
extern int __kmem_cache_create(struct kmem_cache *, unsigned long flags);
int __kmem_cache_create(struct kmem_cache *, slab_flags_t flags);
extern struct kmem_cache *create_kmalloc_cache(const char *name, size_t size,
unsigned long flags);
slab_flags_t flags);
extern void create_boot_cache(struct kmem_cache *, const char *name,
size_t size, unsigned long flags);
size_t size, slab_flags_t flags);
int slab_unmergeable(struct kmem_cache *s);
struct kmem_cache *find_mergeable(size_t size, size_t align,
unsigned long flags, const char *name, void (*ctor)(void *));
slab_flags_t flags, const char *name, void (*ctor)(void *));
#ifndef CONFIG_SLOB
struct kmem_cache *
__kmem_cache_alias(const char *name, size_t size, size_t align,
unsigned long flags, void (*ctor)(void *));
slab_flags_t flags, void (*ctor)(void *));
unsigned long kmem_cache_flags(unsigned long object_size,
unsigned long flags, const char *name,
slab_flags_t kmem_cache_flags(unsigned long object_size,
slab_flags_t flags, const char *name,
void (*ctor)(void *));
#else
static inline struct kmem_cache *
__kmem_cache_alias(const char *name, size_t size, size_t align,
unsigned long flags, void (*ctor)(void *))
slab_flags_t flags, void (*ctor)(void *))
{ return NULL; }
static inline unsigned long kmem_cache_flags(unsigned long object_size,
unsigned long flags, const char *name,
static inline slab_flags_t kmem_cache_flags(unsigned long object_size,
slab_flags_t flags, const char *name,
void (*ctor)(void *))
{
return flags;

16
mm/slab_common.c
View File

@ -291,7 +291,7 @@ int slab_unmergeable(struct kmem_cache *s)
}
struct kmem_cache *find_mergeable(size_t size, size_t align,
unsigned long flags, const char *name, void (*ctor)(void *))
slab_flags_t flags, const char *name, void (*ctor)(void *))
{
struct kmem_cache *s;
@ -341,7 +341,7 @@ struct kmem_cache *find_mergeable(size_t size, size_t align,
* Figure out what the alignment of the objects will be given a set of
* flags, a user specified alignment and the size of the objects.
*/
unsigned long calculate_alignment(unsigned long flags,
unsigned long calculate_alignment(slab_flags_t flags,
unsigned long align, unsigned long size)
{
/*
@ -366,7 +366,7 @@ unsigned long calculate_alignment(unsigned long flags,
static struct kmem_cache *create_cache(const char *name,
size_t object_size, size_t size, size_t align,
unsigned long flags, void (*ctor)(void *),
slab_flags_t flags, void (*ctor)(void *),
struct mem_cgroup *memcg, struct kmem_cache *root_cache)
{
struct kmem_cache *s;
@ -431,7 +431,7 @@ out_free_cache:
*/
struct kmem_cache *
kmem_cache_create(const char *name, size_t size, size_t align,
unsigned long flags, void (*ctor)(void *))
slab_flags_t flags, void (*ctor)(void *))
{
struct kmem_cache *s = NULL;
const char *cache_name;
@ -879,7 +879,7 @@ bool slab_is_available(void)
#ifndef CONFIG_SLOB
/* Create a cache during boot when no slab services are available yet */
void __init create_boot_cache(struct kmem_cache *s, const char *name, size_t size,
unsigned long flags)
slab_flags_t flags)
{
int err;
@ -899,7 +899,7 @@ void __init create_boot_cache(struct kmem_cache *s, const char *name, size_t siz
}
struct kmem_cache *__init create_kmalloc_cache(const char *name, size_t size,
unsigned long flags)
slab_flags_t flags)
{
struct kmem_cache *s = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT);
@ -1057,7 +1057,7 @@ void __init setup_kmalloc_cache_index_table(void)
}
}
static void __init new_kmalloc_cache(int idx, unsigned long flags)
static void __init new_kmalloc_cache(int idx, slab_flags_t flags)
{
kmalloc_caches[idx] = create_kmalloc_cache(kmalloc_info[idx].name,
kmalloc_info[idx].size, flags);
@ -1068,7 +1068,7 @@ static void __init new_kmalloc_cache(int idx, unsigned long flags)
* may already have been created because they were needed to
* enable allocations for slab creation.
*/
void __init create_kmalloc_caches(unsigned long flags)
void __init create_kmalloc_caches(slab_flags_t flags)
{
int i;

2
mm/slob.c
View File

@ -524,7 +524,7 @@ size_t ksize(const void *block)
}
EXPORT_SYMBOL(ksize);
int __kmem_cache_create(struct kmem_cache *c, unsigned long flags)
int __kmem_cache_create(struct kmem_cache *c, slab_flags_t flags)
{
if (flags & SLAB_TYPESAFE_BY_RCU) {
/* leave room for rcu footer at the end of object */

26
mm/slub.c
View File

@ -193,8 +193,10 @@ static inline bool kmem_cache_has_cpu_partial(struct kmem_cache *s)
#define MAX_OBJS_PER_PAGE 32767 /* since page.objects is u15 */
/* Internal SLUB flags */
#define __OBJECT_POISON 0x80000000UL /* Poison object */
#define __CMPXCHG_DOUBLE 0x40000000UL /* Use cmpxchg_double */
/* Poison object */
#define __OBJECT_POISON ((slab_flags_t __force)0x80000000UL)
/* Use cmpxchg_double */
#define __CMPXCHG_DOUBLE ((slab_flags_t __force)0x40000000UL)
/*
* Tracking user of a slab.
@ -485,9 +487,9 @@ static inline void *restore_red_left(struct kmem_cache *s, void *p)
* Debug settings:
*/
#if defined(CONFIG_SLUB_DEBUG_ON)
static int slub_debug = DEBUG_DEFAULT_FLAGS;
static slab_flags_t slub_debug = DEBUG_DEFAULT_FLAGS;
#else
static int slub_debug;
static slab_flags_t slub_debug;
#endif
static char *slub_debug_slabs;
@ -1289,8 +1291,8 @@ out:
__setup("slub_debug", setup_slub_debug);
unsigned long kmem_cache_flags(unsigned long object_size,
unsigned long flags, const char *name,
slab_flags_t kmem_cache_flags(unsigned long object_size,
slab_flags_t flags, const char *name,
void (*ctor)(void *))
{
/*
@ -1322,8 +1324,8 @@ static inline void add_full(struct kmem_cache *s, struct kmem_cache_node *n,
struct page *page) {}
static inline void remove_full(struct kmem_cache *s, struct kmem_cache_node *n,
struct page *page) {}
unsigned long kmem_cache_flags(unsigned long object_size,
unsigned long flags, const char *name,
slab_flags_t kmem_cache_flags(unsigned long object_size,
slab_flags_t flags, const char *name,
void (*ctor)(void *))
{
return flags;
@ -3477,7 +3479,7 @@ static void set_cpu_partial(struct kmem_cache *s)
*/
static int calculate_sizes(struct kmem_cache *s, int forced_order)
{
unsigned long flags = s->flags;
slab_flags_t flags = s->flags;
size_t size = s->object_size;
int order;
@ -3593,7 +3595,7 @@ static int calculate_sizes(struct kmem_cache *s, int forced_order)
return !!oo_objects(s->oo);
}
static int kmem_cache_open(struct kmem_cache *s, unsigned long flags)
static int kmem_cache_open(struct kmem_cache *s, slab_flags_t flags)
{
s->flags = kmem_cache_flags(s->size, flags, s->name, s->ctor);
s->reserved = 0;
@ -4245,7 +4247,7 @@ void __init kmem_cache_init_late(void)
struct kmem_cache *
__kmem_cache_alias(const char *name, size_t size, size_t align,
unsigned long flags, void (*ctor)(void *))
slab_flags_t flags, void (*ctor)(void *))
{
struct kmem_cache *s, *c;
@ -4275,7 +4277,7 @@ __kmem_cache_alias(const char *name, size_t size, size_t align,
return s;
}
int __kmem_cache_create(struct kmem_cache *s, unsigned long flags)
int __kmem_cache_create(struct kmem_cache *s, slab_flags_t flags)
{
int err;