Loading fs/proc/stat.c +1 −1 Original line number Diff line number Diff line Loading @@ -184,7 +184,7 @@ static int show_stat(struct seq_file *p, void *v) static int stat_open(struct inode *inode, struct file *file) { unsigned size = 1024 + 128 * num_possible_cpus(); size_t size = 1024 + 128 * num_possible_cpus(); char *buf; struct seq_file *m; int res; Loading include/linux/kmalloc_sizes.hdeleted 100644 → 0 +0 −45 Original line number Diff line number Diff line #if (PAGE_SIZE == 4096) CACHE(32) #endif CACHE(64) #if L1_CACHE_BYTES < 64 CACHE(96) #endif CACHE(128) #if L1_CACHE_BYTES < 128 CACHE(192) #endif CACHE(256) CACHE(512) CACHE(1024) CACHE(2048) CACHE(4096) CACHE(8192) CACHE(16384) CACHE(32768) CACHE(65536) CACHE(131072) #if KMALLOC_MAX_SIZE >= 262144 CACHE(262144) #endif #if KMALLOC_MAX_SIZE >= 524288 CACHE(524288) #endif #if KMALLOC_MAX_SIZE >= 1048576 CACHE(1048576) #endif #if KMALLOC_MAX_SIZE >= 2097152 CACHE(2097152) #endif #if KMALLOC_MAX_SIZE >= 4194304 CACHE(4194304) #endif #if KMALLOC_MAX_SIZE >= 8388608 CACHE(8388608) #endif #if KMALLOC_MAX_SIZE >= 16777216 CACHE(16777216) #endif #if KMALLOC_MAX_SIZE >= 33554432 CACHE(33554432) #endif include/linux/slab.h +163 −68 Original line number Diff line number Diff line Loading @@ -94,29 +94,6 @@ #define ZERO_OR_NULL_PTR(x) ((unsigned long)(x) <= \ (unsigned long)ZERO_SIZE_PTR) /* * Common fields provided in kmem_cache by all slab allocators * This struct is either used directly by the allocator (SLOB) * or the allocator must include definitions for all fields * provided in kmem_cache_common in their definition of kmem_cache. * * Once we can do anonymous structs (C11 standard) we could put a * anonymous struct definition in these allocators so that the * separate allocations in the kmem_cache structure of SLAB and * SLUB is no longer needed. */ #ifdef CONFIG_SLOB 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 */ const char *name; /* Slab name for sysfs */ int refcount; /* Use counter */ void (*ctor)(void *); /* Called on object slot creation */ struct list_head list; /* List of all slab caches on the system */ }; #endif struct mem_cgroup; /* Loading Loading @@ -148,7 +125,63 @@ void kmem_cache_free(struct kmem_cache *, void *); (__flags), NULL) /* * The largest kmalloc size supported by the slab allocators is * Common kmalloc functions provided by all allocators */ void * __must_check __krealloc(const void *, size_t, gfp_t); void * __must_check krealloc(const void *, size_t, gfp_t); void kfree(const void *); void kzfree(const void *); size_t ksize(const void *); /* * Some archs want to perform DMA into kmalloc caches and need a guaranteed * alignment larger than the alignment of a 64-bit integer. * Setting ARCH_KMALLOC_MINALIGN in arch headers allows that. */ #if defined(ARCH_DMA_MINALIGN) && ARCH_DMA_MINALIGN > 8 #define ARCH_KMALLOC_MINALIGN ARCH_DMA_MINALIGN #define KMALLOC_MIN_SIZE ARCH_DMA_MINALIGN #define KMALLOC_SHIFT_LOW ilog2(ARCH_DMA_MINALIGN) #else #define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long long) #endif #ifdef CONFIG_SLOB /* * Common fields provided in kmem_cache by all slab allocators * This struct is either used directly by the allocator (SLOB) * or the allocator must include definitions for all fields * provided in kmem_cache_common in their definition of kmem_cache. * * Once we can do anonymous structs (C11 standard) we could put a * anonymous struct definition in these allocators so that the * separate allocations in the kmem_cache structure of SLAB and * SLUB is no longer needed. */ 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 */ const char *name; /* Slab name for sysfs */ int refcount; /* Use counter */ void (*ctor)(void *); /* Called on object slot creation */ struct list_head list; /* List of all slab caches on the system */ }; #define KMALLOC_MAX_SIZE (1UL << 30) #include <linux/slob_def.h> #else /* CONFIG_SLOB */ /* * Kmalloc array related definitions */ #ifdef CONFIG_SLAB /* * The largest kmalloc size supported by the SLAB allocators is * 32 megabyte (2^25) or the maximum allocatable page order if that is * less than 32 MB. * Loading @@ -158,21 +191,119 @@ void kmem_cache_free(struct kmem_cache *, void *); */ #define KMALLOC_SHIFT_HIGH ((MAX_ORDER + PAGE_SHIFT - 1) <= 25 ? \ (MAX_ORDER + PAGE_SHIFT - 1) : 25) #define KMALLOC_SHIFT_MAX KMALLOC_SHIFT_HIGH #ifndef KMALLOC_SHIFT_LOW #define KMALLOC_SHIFT_LOW 5 #endif #else /* * SLUB allocates up to order 2 pages directly and otherwise * passes the request to the page allocator. */ #define KMALLOC_SHIFT_HIGH (PAGE_SHIFT + 1) #define KMALLOC_SHIFT_MAX (MAX_ORDER + PAGE_SHIFT) #ifndef KMALLOC_SHIFT_LOW #define KMALLOC_SHIFT_LOW 3 #endif #endif #define KMALLOC_MAX_SIZE (1UL << KMALLOC_SHIFT_HIGH) #define KMALLOC_MAX_ORDER (KMALLOC_SHIFT_HIGH - PAGE_SHIFT) /* Maximum allocatable size */ #define KMALLOC_MAX_SIZE (1UL << KMALLOC_SHIFT_MAX) /* Maximum size for which we actually use a slab cache */ #define KMALLOC_MAX_CACHE_SIZE (1UL << KMALLOC_SHIFT_HIGH) /* Maximum order allocatable via the slab allocagtor */ #define KMALLOC_MAX_ORDER (KMALLOC_SHIFT_MAX - PAGE_SHIFT) /* * Some archs want to perform DMA into kmalloc caches and need a guaranteed * alignment larger than the alignment of a 64-bit integer. * Setting ARCH_KMALLOC_MINALIGN in arch headers allows that. * Kmalloc subsystem. */ #ifdef ARCH_DMA_MINALIGN #define ARCH_KMALLOC_MINALIGN ARCH_DMA_MINALIGN #ifndef KMALLOC_MIN_SIZE #define KMALLOC_MIN_SIZE (1 << KMALLOC_SHIFT_LOW) #endif extern struct kmem_cache *kmalloc_caches[KMALLOC_SHIFT_HIGH + 1]; #ifdef CONFIG_ZONE_DMA extern struct kmem_cache *kmalloc_dma_caches[KMALLOC_SHIFT_HIGH + 1]; #endif /* * Figure out which kmalloc slab an allocation of a certain size * belongs to. * 0 = zero alloc * 1 = 65 .. 96 bytes * 2 = 120 .. 192 bytes * n = 2^(n-1) .. 2^n -1 */ static __always_inline int kmalloc_index(size_t size) { if (!size) return 0; if (size <= KMALLOC_MIN_SIZE) return KMALLOC_SHIFT_LOW; if (KMALLOC_MIN_SIZE <= 32 && size > 64 && size <= 96) return 1; if (KMALLOC_MIN_SIZE <= 64 && size > 128 && size <= 192) return 2; if (size <= 8) return 3; if (size <= 16) return 4; if (size <= 32) return 5; if (size <= 64) return 6; if (size <= 128) return 7; if (size <= 256) return 8; if (size <= 512) return 9; if (size <= 1024) return 10; if (size <= 2 * 1024) return 11; if (size <= 4 * 1024) return 12; if (size <= 8 * 1024) return 13; if (size <= 16 * 1024) return 14; if (size <= 32 * 1024) return 15; if (size <= 64 * 1024) return 16; if (size <= 128 * 1024) return 17; if (size <= 256 * 1024) return 18; if (size <= 512 * 1024) return 19; if (size <= 1024 * 1024) return 20; if (size <= 2 * 1024 * 1024) return 21; if (size <= 4 * 1024 * 1024) return 22; if (size <= 8 * 1024 * 1024) return 23; if (size <= 16 * 1024 * 1024) return 24; if (size <= 32 * 1024 * 1024) return 25; if (size <= 64 * 1024 * 1024) return 26; BUG(); /* Will never be reached. Needed because the compiler may complain */ return -1; } #ifdef CONFIG_SLAB #include <linux/slab_def.h> #elif defined(CONFIG_SLUB) #include <linux/slub_def.h> #else #define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long long) #error "Unknown slab allocator" #endif /* * Determine size used for the nth kmalloc cache. * return size or 0 if a kmalloc cache for that * size does not exist */ static __always_inline int kmalloc_size(int n) { if (n > 2) return 1 << n; if (n == 1 && KMALLOC_MIN_SIZE <= 32) return 96; if (n == 2 && KMALLOC_MIN_SIZE <= 64) return 192; return 0; } #endif /* !CONFIG_SLOB */ /* * Setting ARCH_SLAB_MINALIGN in arch headers allows a different alignment. * Intended for arches that get misalignment faults even for 64 bit integer Loading Loading @@ -224,42 +355,6 @@ struct seq_file; int cache_show(struct kmem_cache *s, struct seq_file *m); void print_slabinfo_header(struct seq_file *m); /* * Common kmalloc functions provided by all allocators */ void * __must_check __krealloc(const void *, size_t, gfp_t); void * __must_check krealloc(const void *, size_t, gfp_t); void kfree(const void *); void kzfree(const void *); size_t ksize(const void *); /* * Allocator specific definitions. These are mainly used to establish optimized * ways to convert kmalloc() calls to kmem_cache_alloc() invocations by * selecting the appropriate general cache at compile time. * * Allocators must define at least: * * kmem_cache_alloc() * __kmalloc() * kmalloc() * * Those wishing to support NUMA must also define: * * kmem_cache_alloc_node() * kmalloc_node() * * See each allocator definition file for additional comments and * implementation notes. */ #ifdef CONFIG_SLUB #include <linux/slub_def.h> #elif defined(CONFIG_SLOB) #include <linux/slob_def.h> #else #include <linux/slab_def.h> #endif /** * kmalloc_array - allocate memory for an array. * @n: number of elements. Loading include/linux/slab_def.h +17 −37 Original line number Diff line number Diff line Loading @@ -11,8 +11,6 @@ */ #include <linux/init.h> #include <asm/page.h> /* kmalloc_sizes.h needs PAGE_SIZE */ #include <asm/cache.h> /* kmalloc_sizes.h needs L1_CACHE_BYTES */ #include <linux/compiler.h> /* Loading Loading @@ -97,23 +95,13 @@ struct kmem_cache { * pointer for each node since "nodelists" uses the remainder of * available pointers. */ struct kmem_list3 **nodelists; struct kmem_cache_node **node; struct array_cache *array[NR_CPUS + MAX_NUMNODES]; /* * Do not add fields after array[] */ }; /* Size description struct for general caches. */ struct cache_sizes { size_t cs_size; struct kmem_cache *cs_cachep; #ifdef CONFIG_ZONE_DMA struct kmem_cache *cs_dmacachep; #endif }; extern struct cache_sizes malloc_sizes[]; void *kmem_cache_alloc(struct kmem_cache *, gfp_t); void *__kmalloc(size_t size, gfp_t flags); Loading @@ -133,26 +121,22 @@ static __always_inline void *kmalloc(size_t size, gfp_t flags) void *ret; if (__builtin_constant_p(size)) { int i = 0; int i; if (!size) return ZERO_SIZE_PTR; #define CACHE(x) \ if (size <= x) \ goto found; \ else \ i++; #include <linux/kmalloc_sizes.h> #undef CACHE if (WARN_ON_ONCE(size > KMALLOC_MAX_SIZE)) return NULL; found: i = kmalloc_index(size); #ifdef CONFIG_ZONE_DMA if (flags & GFP_DMA) cachep = malloc_sizes[i].cs_dmacachep; cachep = kmalloc_dma_caches[i]; else #endif cachep = malloc_sizes[i].cs_cachep; cachep = kmalloc_caches[i]; ret = kmem_cache_alloc_trace(cachep, flags, size); Loading Loading @@ -186,26 +170,22 @@ static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node) struct kmem_cache *cachep; if (__builtin_constant_p(size)) { int i = 0; int i; if (!size) return ZERO_SIZE_PTR; #define CACHE(x) \ if (size <= x) \ goto found; \ else \ i++; #include <linux/kmalloc_sizes.h> #undef CACHE if (WARN_ON_ONCE(size > KMALLOC_MAX_SIZE)) return NULL; found: i = kmalloc_index(size); #ifdef CONFIG_ZONE_DMA if (flags & GFP_DMA) cachep = malloc_sizes[i].cs_dmacachep; cachep = kmalloc_dma_caches[i]; else #endif cachep = malloc_sizes[i].cs_cachep; cachep = kmalloc_caches[i]; return kmem_cache_alloc_node_trace(cachep, flags, node, size); } Loading include/linux/slub_def.h +11 −125 Original line number Diff line number Diff line Loading @@ -53,17 +53,6 @@ struct kmem_cache_cpu { #endif }; struct kmem_cache_node { spinlock_t list_lock; /* Protect partial list and nr_partial */ unsigned long nr_partial; struct list_head partial; #ifdef CONFIG_SLUB_DEBUG atomic_long_t nr_slabs; atomic_long_t total_objects; struct list_head full; #endif }; /* * Word size structure that can be atomically updated or read and that * contains both the order and the number of objects that a slab of the Loading Loading @@ -115,111 +104,6 @@ struct kmem_cache { struct kmem_cache_node *node[MAX_NUMNODES]; }; /* * Kmalloc subsystem. */ #if defined(ARCH_DMA_MINALIGN) && ARCH_DMA_MINALIGN > 8 #define KMALLOC_MIN_SIZE ARCH_DMA_MINALIGN #else #define KMALLOC_MIN_SIZE 8 #endif #define KMALLOC_SHIFT_LOW ilog2(KMALLOC_MIN_SIZE) /* * Maximum kmalloc object size handled by SLUB. Larger object allocations * are passed through to the page allocator. The page allocator "fastpath" * is relatively slow so we need this value sufficiently high so that * performance critical objects are allocated through the SLUB fastpath. * * This should be dropped to PAGE_SIZE / 2 once the page allocator * "fastpath" becomes competitive with the slab allocator fastpaths. */ #define SLUB_MAX_SIZE (2 * PAGE_SIZE) #define SLUB_PAGE_SHIFT (PAGE_SHIFT + 2) #ifdef CONFIG_ZONE_DMA #define SLUB_DMA __GFP_DMA #else /* Disable DMA functionality */ #define SLUB_DMA (__force gfp_t)0 #endif /* * We keep the general caches in an array of slab caches that are used for * 2^x bytes of allocations. */ extern struct kmem_cache *kmalloc_caches[SLUB_PAGE_SHIFT]; /* * Sorry that the following has to be that ugly but some versions of GCC * have trouble with constant propagation and loops. */ static __always_inline int kmalloc_index(size_t size) { if (!size) return 0; if (size <= KMALLOC_MIN_SIZE) return KMALLOC_SHIFT_LOW; if (KMALLOC_MIN_SIZE <= 32 && size > 64 && size <= 96) return 1; if (KMALLOC_MIN_SIZE <= 64 && size > 128 && size <= 192) return 2; if (size <= 8) return 3; if (size <= 16) return 4; if (size <= 32) return 5; if (size <= 64) return 6; if (size <= 128) return 7; if (size <= 256) return 8; if (size <= 512) return 9; if (size <= 1024) return 10; if (size <= 2 * 1024) return 11; if (size <= 4 * 1024) return 12; /* * The following is only needed to support architectures with a larger page * size than 4k. We need to support 2 * PAGE_SIZE here. So for a 64k page * size we would have to go up to 128k. */ if (size <= 8 * 1024) return 13; if (size <= 16 * 1024) return 14; if (size <= 32 * 1024) return 15; if (size <= 64 * 1024) return 16; if (size <= 128 * 1024) return 17; if (size <= 256 * 1024) return 18; if (size <= 512 * 1024) return 19; if (size <= 1024 * 1024) return 20; if (size <= 2 * 1024 * 1024) return 21; BUG(); return -1; /* Will never be reached */ /* * What we really wanted to do and cannot do because of compiler issues is: * int i; * for (i = KMALLOC_SHIFT_LOW; i <= KMALLOC_SHIFT_HIGH; i++) * if (size <= (1 << i)) * return i; */ } /* * Find the slab cache for a given combination of allocation flags and size. * * This ought to end up with a global pointer to the right cache * in kmalloc_caches. */ static __always_inline struct kmem_cache *kmalloc_slab(size_t size) { int index = kmalloc_index(size); if (index == 0) return NULL; return kmalloc_caches[index]; } void *kmem_cache_alloc(struct kmem_cache *, gfp_t); void *__kmalloc(size_t size, gfp_t flags); Loading Loading @@ -274,16 +158,17 @@ static __always_inline void *kmalloc_large(size_t size, gfp_t flags) static __always_inline void *kmalloc(size_t size, gfp_t flags) { if (__builtin_constant_p(size)) { if (size > SLUB_MAX_SIZE) if (size > KMALLOC_MAX_CACHE_SIZE) return kmalloc_large(size, flags); if (!(flags & SLUB_DMA)) { struct kmem_cache *s = kmalloc_slab(size); if (!(flags & GFP_DMA)) { int index = kmalloc_index(size); if (!s) if (!index) return ZERO_SIZE_PTR; return kmem_cache_alloc_trace(s, flags, size); return kmem_cache_alloc_trace(kmalloc_caches[index], flags, size); } } return __kmalloc(size, flags); Loading @@ -310,13 +195,14 @@ kmem_cache_alloc_node_trace(struct kmem_cache *s, static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node) { if (__builtin_constant_p(size) && size <= SLUB_MAX_SIZE && !(flags & SLUB_DMA)) { struct kmem_cache *s = kmalloc_slab(size); size <= KMALLOC_MAX_CACHE_SIZE && !(flags & GFP_DMA)) { int index = kmalloc_index(size); if (!s) if (!index) return ZERO_SIZE_PTR; return kmem_cache_alloc_node_trace(s, flags, node, size); return kmem_cache_alloc_node_trace(kmalloc_caches[index], flags, node, size); } return __kmalloc_node(size, flags, node); } Loading Loading
fs/proc/stat.c +1 −1 Original line number Diff line number Diff line Loading @@ -184,7 +184,7 @@ static int show_stat(struct seq_file *p, void *v) static int stat_open(struct inode *inode, struct file *file) { unsigned size = 1024 + 128 * num_possible_cpus(); size_t size = 1024 + 128 * num_possible_cpus(); char *buf; struct seq_file *m; int res; Loading
include/linux/kmalloc_sizes.hdeleted 100644 → 0 +0 −45 Original line number Diff line number Diff line #if (PAGE_SIZE == 4096) CACHE(32) #endif CACHE(64) #if L1_CACHE_BYTES < 64 CACHE(96) #endif CACHE(128) #if L1_CACHE_BYTES < 128 CACHE(192) #endif CACHE(256) CACHE(512) CACHE(1024) CACHE(2048) CACHE(4096) CACHE(8192) CACHE(16384) CACHE(32768) CACHE(65536) CACHE(131072) #if KMALLOC_MAX_SIZE >= 262144 CACHE(262144) #endif #if KMALLOC_MAX_SIZE >= 524288 CACHE(524288) #endif #if KMALLOC_MAX_SIZE >= 1048576 CACHE(1048576) #endif #if KMALLOC_MAX_SIZE >= 2097152 CACHE(2097152) #endif #if KMALLOC_MAX_SIZE >= 4194304 CACHE(4194304) #endif #if KMALLOC_MAX_SIZE >= 8388608 CACHE(8388608) #endif #if KMALLOC_MAX_SIZE >= 16777216 CACHE(16777216) #endif #if KMALLOC_MAX_SIZE >= 33554432 CACHE(33554432) #endif
include/linux/slab.h +163 −68 Original line number Diff line number Diff line Loading @@ -94,29 +94,6 @@ #define ZERO_OR_NULL_PTR(x) ((unsigned long)(x) <= \ (unsigned long)ZERO_SIZE_PTR) /* * Common fields provided in kmem_cache by all slab allocators * This struct is either used directly by the allocator (SLOB) * or the allocator must include definitions for all fields * provided in kmem_cache_common in their definition of kmem_cache. * * Once we can do anonymous structs (C11 standard) we could put a * anonymous struct definition in these allocators so that the * separate allocations in the kmem_cache structure of SLAB and * SLUB is no longer needed. */ #ifdef CONFIG_SLOB 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 */ const char *name; /* Slab name for sysfs */ int refcount; /* Use counter */ void (*ctor)(void *); /* Called on object slot creation */ struct list_head list; /* List of all slab caches on the system */ }; #endif struct mem_cgroup; /* Loading Loading @@ -148,7 +125,63 @@ void kmem_cache_free(struct kmem_cache *, void *); (__flags), NULL) /* * The largest kmalloc size supported by the slab allocators is * Common kmalloc functions provided by all allocators */ void * __must_check __krealloc(const void *, size_t, gfp_t); void * __must_check krealloc(const void *, size_t, gfp_t); void kfree(const void *); void kzfree(const void *); size_t ksize(const void *); /* * Some archs want to perform DMA into kmalloc caches and need a guaranteed * alignment larger than the alignment of a 64-bit integer. * Setting ARCH_KMALLOC_MINALIGN in arch headers allows that. */ #if defined(ARCH_DMA_MINALIGN) && ARCH_DMA_MINALIGN > 8 #define ARCH_KMALLOC_MINALIGN ARCH_DMA_MINALIGN #define KMALLOC_MIN_SIZE ARCH_DMA_MINALIGN #define KMALLOC_SHIFT_LOW ilog2(ARCH_DMA_MINALIGN) #else #define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long long) #endif #ifdef CONFIG_SLOB /* * Common fields provided in kmem_cache by all slab allocators * This struct is either used directly by the allocator (SLOB) * or the allocator must include definitions for all fields * provided in kmem_cache_common in their definition of kmem_cache. * * Once we can do anonymous structs (C11 standard) we could put a * anonymous struct definition in these allocators so that the * separate allocations in the kmem_cache structure of SLAB and * SLUB is no longer needed. */ 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 */ const char *name; /* Slab name for sysfs */ int refcount; /* Use counter */ void (*ctor)(void *); /* Called on object slot creation */ struct list_head list; /* List of all slab caches on the system */ }; #define KMALLOC_MAX_SIZE (1UL << 30) #include <linux/slob_def.h> #else /* CONFIG_SLOB */ /* * Kmalloc array related definitions */ #ifdef CONFIG_SLAB /* * The largest kmalloc size supported by the SLAB allocators is * 32 megabyte (2^25) or the maximum allocatable page order if that is * less than 32 MB. * Loading @@ -158,21 +191,119 @@ void kmem_cache_free(struct kmem_cache *, void *); */ #define KMALLOC_SHIFT_HIGH ((MAX_ORDER + PAGE_SHIFT - 1) <= 25 ? \ (MAX_ORDER + PAGE_SHIFT - 1) : 25) #define KMALLOC_SHIFT_MAX KMALLOC_SHIFT_HIGH #ifndef KMALLOC_SHIFT_LOW #define KMALLOC_SHIFT_LOW 5 #endif #else /* * SLUB allocates up to order 2 pages directly and otherwise * passes the request to the page allocator. */ #define KMALLOC_SHIFT_HIGH (PAGE_SHIFT + 1) #define KMALLOC_SHIFT_MAX (MAX_ORDER + PAGE_SHIFT) #ifndef KMALLOC_SHIFT_LOW #define KMALLOC_SHIFT_LOW 3 #endif #endif #define KMALLOC_MAX_SIZE (1UL << KMALLOC_SHIFT_HIGH) #define KMALLOC_MAX_ORDER (KMALLOC_SHIFT_HIGH - PAGE_SHIFT) /* Maximum allocatable size */ #define KMALLOC_MAX_SIZE (1UL << KMALLOC_SHIFT_MAX) /* Maximum size for which we actually use a slab cache */ #define KMALLOC_MAX_CACHE_SIZE (1UL << KMALLOC_SHIFT_HIGH) /* Maximum order allocatable via the slab allocagtor */ #define KMALLOC_MAX_ORDER (KMALLOC_SHIFT_MAX - PAGE_SHIFT) /* * Some archs want to perform DMA into kmalloc caches and need a guaranteed * alignment larger than the alignment of a 64-bit integer. * Setting ARCH_KMALLOC_MINALIGN in arch headers allows that. * Kmalloc subsystem. */ #ifdef ARCH_DMA_MINALIGN #define ARCH_KMALLOC_MINALIGN ARCH_DMA_MINALIGN #ifndef KMALLOC_MIN_SIZE #define KMALLOC_MIN_SIZE (1 << KMALLOC_SHIFT_LOW) #endif extern struct kmem_cache *kmalloc_caches[KMALLOC_SHIFT_HIGH + 1]; #ifdef CONFIG_ZONE_DMA extern struct kmem_cache *kmalloc_dma_caches[KMALLOC_SHIFT_HIGH + 1]; #endif /* * Figure out which kmalloc slab an allocation of a certain size * belongs to. * 0 = zero alloc * 1 = 65 .. 96 bytes * 2 = 120 .. 192 bytes * n = 2^(n-1) .. 2^n -1 */ static __always_inline int kmalloc_index(size_t size) { if (!size) return 0; if (size <= KMALLOC_MIN_SIZE) return KMALLOC_SHIFT_LOW; if (KMALLOC_MIN_SIZE <= 32 && size > 64 && size <= 96) return 1; if (KMALLOC_MIN_SIZE <= 64 && size > 128 && size <= 192) return 2; if (size <= 8) return 3; if (size <= 16) return 4; if (size <= 32) return 5; if (size <= 64) return 6; if (size <= 128) return 7; if (size <= 256) return 8; if (size <= 512) return 9; if (size <= 1024) return 10; if (size <= 2 * 1024) return 11; if (size <= 4 * 1024) return 12; if (size <= 8 * 1024) return 13; if (size <= 16 * 1024) return 14; if (size <= 32 * 1024) return 15; if (size <= 64 * 1024) return 16; if (size <= 128 * 1024) return 17; if (size <= 256 * 1024) return 18; if (size <= 512 * 1024) return 19; if (size <= 1024 * 1024) return 20; if (size <= 2 * 1024 * 1024) return 21; if (size <= 4 * 1024 * 1024) return 22; if (size <= 8 * 1024 * 1024) return 23; if (size <= 16 * 1024 * 1024) return 24; if (size <= 32 * 1024 * 1024) return 25; if (size <= 64 * 1024 * 1024) return 26; BUG(); /* Will never be reached. Needed because the compiler may complain */ return -1; } #ifdef CONFIG_SLAB #include <linux/slab_def.h> #elif defined(CONFIG_SLUB) #include <linux/slub_def.h> #else #define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long long) #error "Unknown slab allocator" #endif /* * Determine size used for the nth kmalloc cache. * return size or 0 if a kmalloc cache for that * size does not exist */ static __always_inline int kmalloc_size(int n) { if (n > 2) return 1 << n; if (n == 1 && KMALLOC_MIN_SIZE <= 32) return 96; if (n == 2 && KMALLOC_MIN_SIZE <= 64) return 192; return 0; } #endif /* !CONFIG_SLOB */ /* * Setting ARCH_SLAB_MINALIGN in arch headers allows a different alignment. * Intended for arches that get misalignment faults even for 64 bit integer Loading Loading @@ -224,42 +355,6 @@ struct seq_file; int cache_show(struct kmem_cache *s, struct seq_file *m); void print_slabinfo_header(struct seq_file *m); /* * Common kmalloc functions provided by all allocators */ void * __must_check __krealloc(const void *, size_t, gfp_t); void * __must_check krealloc(const void *, size_t, gfp_t); void kfree(const void *); void kzfree(const void *); size_t ksize(const void *); /* * Allocator specific definitions. These are mainly used to establish optimized * ways to convert kmalloc() calls to kmem_cache_alloc() invocations by * selecting the appropriate general cache at compile time. * * Allocators must define at least: * * kmem_cache_alloc() * __kmalloc() * kmalloc() * * Those wishing to support NUMA must also define: * * kmem_cache_alloc_node() * kmalloc_node() * * See each allocator definition file for additional comments and * implementation notes. */ #ifdef CONFIG_SLUB #include <linux/slub_def.h> #elif defined(CONFIG_SLOB) #include <linux/slob_def.h> #else #include <linux/slab_def.h> #endif /** * kmalloc_array - allocate memory for an array. * @n: number of elements. Loading
include/linux/slab_def.h +17 −37 Original line number Diff line number Diff line Loading @@ -11,8 +11,6 @@ */ #include <linux/init.h> #include <asm/page.h> /* kmalloc_sizes.h needs PAGE_SIZE */ #include <asm/cache.h> /* kmalloc_sizes.h needs L1_CACHE_BYTES */ #include <linux/compiler.h> /* Loading Loading @@ -97,23 +95,13 @@ struct kmem_cache { * pointer for each node since "nodelists" uses the remainder of * available pointers. */ struct kmem_list3 **nodelists; struct kmem_cache_node **node; struct array_cache *array[NR_CPUS + MAX_NUMNODES]; /* * Do not add fields after array[] */ }; /* Size description struct for general caches. */ struct cache_sizes { size_t cs_size; struct kmem_cache *cs_cachep; #ifdef CONFIG_ZONE_DMA struct kmem_cache *cs_dmacachep; #endif }; extern struct cache_sizes malloc_sizes[]; void *kmem_cache_alloc(struct kmem_cache *, gfp_t); void *__kmalloc(size_t size, gfp_t flags); Loading @@ -133,26 +121,22 @@ static __always_inline void *kmalloc(size_t size, gfp_t flags) void *ret; if (__builtin_constant_p(size)) { int i = 0; int i; if (!size) return ZERO_SIZE_PTR; #define CACHE(x) \ if (size <= x) \ goto found; \ else \ i++; #include <linux/kmalloc_sizes.h> #undef CACHE if (WARN_ON_ONCE(size > KMALLOC_MAX_SIZE)) return NULL; found: i = kmalloc_index(size); #ifdef CONFIG_ZONE_DMA if (flags & GFP_DMA) cachep = malloc_sizes[i].cs_dmacachep; cachep = kmalloc_dma_caches[i]; else #endif cachep = malloc_sizes[i].cs_cachep; cachep = kmalloc_caches[i]; ret = kmem_cache_alloc_trace(cachep, flags, size); Loading Loading @@ -186,26 +170,22 @@ static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node) struct kmem_cache *cachep; if (__builtin_constant_p(size)) { int i = 0; int i; if (!size) return ZERO_SIZE_PTR; #define CACHE(x) \ if (size <= x) \ goto found; \ else \ i++; #include <linux/kmalloc_sizes.h> #undef CACHE if (WARN_ON_ONCE(size > KMALLOC_MAX_SIZE)) return NULL; found: i = kmalloc_index(size); #ifdef CONFIG_ZONE_DMA if (flags & GFP_DMA) cachep = malloc_sizes[i].cs_dmacachep; cachep = kmalloc_dma_caches[i]; else #endif cachep = malloc_sizes[i].cs_cachep; cachep = kmalloc_caches[i]; return kmem_cache_alloc_node_trace(cachep, flags, node, size); } Loading
include/linux/slub_def.h +11 −125 Original line number Diff line number Diff line Loading @@ -53,17 +53,6 @@ struct kmem_cache_cpu { #endif }; struct kmem_cache_node { spinlock_t list_lock; /* Protect partial list and nr_partial */ unsigned long nr_partial; struct list_head partial; #ifdef CONFIG_SLUB_DEBUG atomic_long_t nr_slabs; atomic_long_t total_objects; struct list_head full; #endif }; /* * Word size structure that can be atomically updated or read and that * contains both the order and the number of objects that a slab of the Loading Loading @@ -115,111 +104,6 @@ struct kmem_cache { struct kmem_cache_node *node[MAX_NUMNODES]; }; /* * Kmalloc subsystem. */ #if defined(ARCH_DMA_MINALIGN) && ARCH_DMA_MINALIGN > 8 #define KMALLOC_MIN_SIZE ARCH_DMA_MINALIGN #else #define KMALLOC_MIN_SIZE 8 #endif #define KMALLOC_SHIFT_LOW ilog2(KMALLOC_MIN_SIZE) /* * Maximum kmalloc object size handled by SLUB. Larger object allocations * are passed through to the page allocator. The page allocator "fastpath" * is relatively slow so we need this value sufficiently high so that * performance critical objects are allocated through the SLUB fastpath. * * This should be dropped to PAGE_SIZE / 2 once the page allocator * "fastpath" becomes competitive with the slab allocator fastpaths. */ #define SLUB_MAX_SIZE (2 * PAGE_SIZE) #define SLUB_PAGE_SHIFT (PAGE_SHIFT + 2) #ifdef CONFIG_ZONE_DMA #define SLUB_DMA __GFP_DMA #else /* Disable DMA functionality */ #define SLUB_DMA (__force gfp_t)0 #endif /* * We keep the general caches in an array of slab caches that are used for * 2^x bytes of allocations. */ extern struct kmem_cache *kmalloc_caches[SLUB_PAGE_SHIFT]; /* * Sorry that the following has to be that ugly but some versions of GCC * have trouble with constant propagation and loops. */ static __always_inline int kmalloc_index(size_t size) { if (!size) return 0; if (size <= KMALLOC_MIN_SIZE) return KMALLOC_SHIFT_LOW; if (KMALLOC_MIN_SIZE <= 32 && size > 64 && size <= 96) return 1; if (KMALLOC_MIN_SIZE <= 64 && size > 128 && size <= 192) return 2; if (size <= 8) return 3; if (size <= 16) return 4; if (size <= 32) return 5; if (size <= 64) return 6; if (size <= 128) return 7; if (size <= 256) return 8; if (size <= 512) return 9; if (size <= 1024) return 10; if (size <= 2 * 1024) return 11; if (size <= 4 * 1024) return 12; /* * The following is only needed to support architectures with a larger page * size than 4k. We need to support 2 * PAGE_SIZE here. So for a 64k page * size we would have to go up to 128k. */ if (size <= 8 * 1024) return 13; if (size <= 16 * 1024) return 14; if (size <= 32 * 1024) return 15; if (size <= 64 * 1024) return 16; if (size <= 128 * 1024) return 17; if (size <= 256 * 1024) return 18; if (size <= 512 * 1024) return 19; if (size <= 1024 * 1024) return 20; if (size <= 2 * 1024 * 1024) return 21; BUG(); return -1; /* Will never be reached */ /* * What we really wanted to do and cannot do because of compiler issues is: * int i; * for (i = KMALLOC_SHIFT_LOW; i <= KMALLOC_SHIFT_HIGH; i++) * if (size <= (1 << i)) * return i; */ } /* * Find the slab cache for a given combination of allocation flags and size. * * This ought to end up with a global pointer to the right cache * in kmalloc_caches. */ static __always_inline struct kmem_cache *kmalloc_slab(size_t size) { int index = kmalloc_index(size); if (index == 0) return NULL; return kmalloc_caches[index]; } void *kmem_cache_alloc(struct kmem_cache *, gfp_t); void *__kmalloc(size_t size, gfp_t flags); Loading Loading @@ -274,16 +158,17 @@ static __always_inline void *kmalloc_large(size_t size, gfp_t flags) static __always_inline void *kmalloc(size_t size, gfp_t flags) { if (__builtin_constant_p(size)) { if (size > SLUB_MAX_SIZE) if (size > KMALLOC_MAX_CACHE_SIZE) return kmalloc_large(size, flags); if (!(flags & SLUB_DMA)) { struct kmem_cache *s = kmalloc_slab(size); if (!(flags & GFP_DMA)) { int index = kmalloc_index(size); if (!s) if (!index) return ZERO_SIZE_PTR; return kmem_cache_alloc_trace(s, flags, size); return kmem_cache_alloc_trace(kmalloc_caches[index], flags, size); } } return __kmalloc(size, flags); Loading @@ -310,13 +195,14 @@ kmem_cache_alloc_node_trace(struct kmem_cache *s, static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node) { if (__builtin_constant_p(size) && size <= SLUB_MAX_SIZE && !(flags & SLUB_DMA)) { struct kmem_cache *s = kmalloc_slab(size); size <= KMALLOC_MAX_CACHE_SIZE && !(flags & GFP_DMA)) { int index = kmalloc_index(size); if (!s) if (!index) return ZERO_SIZE_PTR; return kmem_cache_alloc_node_trace(s, flags, node, size); return kmem_cache_alloc_node_trace(kmalloc_caches[index], flags, node, size); } return __kmalloc_node(size, flags, node); } Loading
