X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=mm%2Fslab.c;h=1fcf3ac94b6ccd3e085c5a0c6ba35a59fe553e8e;hb=20cea9683ecc6dd75a80c0dd02dc69c64e95be75;hp=e901a36e2520c2b7aa5123ddcd0553415b764397;hpb=5ff5c3a4ab0d638fa63e939e75727c233b681e8d;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git diff --git a/mm/slab.c b/mm/slab.c index e901a36..1fcf3ac 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -68,7 +68,7 @@ * Further notes from the original documentation: * * 11 April '97. Started multi-threading - markhe - * The global cache-chain is protected by the mutex 'cache_chain_mutex'. + * The global cache-chain is protected by the mutex 'slab_mutex'. * The sem is only needed when accessing/extending the cache-chain, which * can never happen inside an interrupt (kmem_cache_create(), * kmem_cache_shrink() and kmem_cache_reap()). @@ -87,6 +87,7 @@ */ #include +#include "slab.h" #include #include #include @@ -424,8 +425,8 @@ static void kmem_list3_init(struct kmem_list3 *parent) * cachep->obj_offset - BYTES_PER_WORD .. cachep->obj_offset - 1: * redzone word. * cachep->obj_offset: The real object. - * cachep->buffer_size - 2* BYTES_PER_WORD: redzone word [BYTES_PER_WORD long] - * cachep->buffer_size - 1* BYTES_PER_WORD: last caller address + * cachep->size - 2* BYTES_PER_WORD: redzone word [BYTES_PER_WORD long] + * cachep->size - 1* BYTES_PER_WORD: last caller address * [BYTES_PER_WORD long] */ static int obj_offset(struct kmem_cache *cachep) @@ -433,11 +434,6 @@ static int obj_offset(struct kmem_cache *cachep) return cachep->obj_offset; } -static int obj_size(struct kmem_cache *cachep) -{ - return cachep->obj_size; -} - static unsigned long long *dbg_redzone1(struct kmem_cache *cachep, void *objp) { BUG_ON(!(cachep->flags & SLAB_RED_ZONE)); @@ -449,23 +445,22 @@ static unsigned long long *dbg_redzone2(struct kmem_cache *cachep, void *objp) { BUG_ON(!(cachep->flags & SLAB_RED_ZONE)); if (cachep->flags & SLAB_STORE_USER) - return (unsigned long long *)(objp + cachep->buffer_size - + return (unsigned long long *)(objp + cachep->size - sizeof(unsigned long long) - REDZONE_ALIGN); - return (unsigned long long *) (objp + cachep->buffer_size - + return (unsigned long long *) (objp + cachep->size - sizeof(unsigned long long)); } static void **dbg_userword(struct kmem_cache *cachep, void *objp) { BUG_ON(!(cachep->flags & SLAB_STORE_USER)); - return (void **)(objp + cachep->buffer_size - BYTES_PER_WORD); + return (void **)(objp + cachep->size - BYTES_PER_WORD); } #else #define obj_offset(x) 0 -#define obj_size(cachep) (cachep->buffer_size) #define dbg_redzone1(cachep, objp) ({BUG(); (unsigned long long *)NULL;}) #define dbg_redzone2(cachep, objp) ({BUG(); (unsigned long long *)NULL;}) #define dbg_userword(cachep, objp) ({BUG(); (void **)NULL;}) @@ -475,7 +470,7 @@ static void **dbg_userword(struct kmem_cache *cachep, void *objp) #ifdef CONFIG_TRACING size_t slab_buffer_size(struct kmem_cache *cachep) { - return cachep->buffer_size; + return cachep->size; } EXPORT_SYMBOL(slab_buffer_size); #endif @@ -489,56 +484,37 @@ EXPORT_SYMBOL(slab_buffer_size); static int slab_max_order = SLAB_MAX_ORDER_LO; static bool slab_max_order_set __initdata; -/* - * Functions for storing/retrieving the cachep and or slab from the page - * allocator. These are used to find the slab an obj belongs to. With kfree(), - * these are used to find the cache which an obj belongs to. - */ -static inline void page_set_cache(struct page *page, struct kmem_cache *cache) -{ - page->lru.next = (struct list_head *)cache; -} - static inline struct kmem_cache *page_get_cache(struct page *page) { page = compound_head(page); BUG_ON(!PageSlab(page)); - return (struct kmem_cache *)page->lru.next; -} - -static inline void page_set_slab(struct page *page, struct slab *slab) -{ - page->lru.prev = (struct list_head *)slab; -} - -static inline struct slab *page_get_slab(struct page *page) -{ - BUG_ON(!PageSlab(page)); - return (struct slab *)page->lru.prev; + return page->slab_cache; } static inline struct kmem_cache *virt_to_cache(const void *obj) { struct page *page = virt_to_head_page(obj); - return page_get_cache(page); + return page->slab_cache; } static inline struct slab *virt_to_slab(const void *obj) { struct page *page = virt_to_head_page(obj); - return page_get_slab(page); + + VM_BUG_ON(!PageSlab(page)); + return page->slab_page; } static inline void *index_to_obj(struct kmem_cache *cache, struct slab *slab, unsigned int idx) { - return slab->s_mem + cache->buffer_size * idx; + return slab->s_mem + cache->size * idx; } /* - * We want to avoid an expensive divide : (offset / cache->buffer_size) - * Using the fact that buffer_size is a constant for a particular cache, - * we can replace (offset / cache->buffer_size) by + * We want to avoid an expensive divide : (offset / cache->size) + * Using the fact that size is a constant for a particular cache, + * we can replace (offset / cache->size) by * reciprocal_divide(offset, cache->reciprocal_buffer_size) */ static inline unsigned int obj_to_index(const struct kmem_cache *cache, @@ -584,33 +560,12 @@ static struct kmem_cache cache_cache = { .batchcount = 1, .limit = BOOT_CPUCACHE_ENTRIES, .shared = 1, - .buffer_size = sizeof(struct kmem_cache), + .size = sizeof(struct kmem_cache), .name = "kmem_cache", }; #define BAD_ALIEN_MAGIC 0x01020304ul -/* - * chicken and egg problem: delay the per-cpu array allocation - * until the general caches are up. - */ -static enum { - NONE, - PARTIAL_AC, - PARTIAL_L3, - EARLY, - LATE, - FULL -} g_cpucache_up; - -/* - * used by boot code to determine if it can use slab based allocator - */ -int slab_is_available(void) -{ - return g_cpucache_up >= EARLY; -} - #ifdef CONFIG_LOCKDEP /* @@ -676,7 +631,7 @@ static void init_node_lock_keys(int q) { struct cache_sizes *s = malloc_sizes; - if (g_cpucache_up < LATE) + if (slab_state < UP) return; for (s = malloc_sizes; s->cs_size != ULONG_MAX; s++) { @@ -716,12 +671,6 @@ static void slab_set_debugobj_lock_classes(struct kmem_cache *cachep) } #endif -/* - * Guard access to the cache-chain. - */ -static DEFINE_MUTEX(cache_chain_mutex); -static struct list_head cache_chain; - static DEFINE_PER_CPU(struct delayed_work, slab_reap_work); static inline struct array_cache *cpu_cache_get(struct kmem_cache *cachep) @@ -1145,7 +1094,7 @@ static inline int cache_free_alien(struct kmem_cache *cachep, void *objp) * When hotplugging memory or a cpu, existing nodelists are not replaced if * already in use. * - * Must hold cache_chain_mutex. + * Must hold slab_mutex. */ static int init_cache_nodelists_node(int node) { @@ -1153,7 +1102,7 @@ static int init_cache_nodelists_node(int node) struct kmem_list3 *l3; const int memsize = sizeof(struct kmem_list3); - list_for_each_entry(cachep, &cache_chain, next) { + list_for_each_entry(cachep, &slab_caches, list) { /* * Set up the size64 kmemlist for cpu before we can * begin anything. Make sure some other cpu on this @@ -1169,7 +1118,7 @@ static int init_cache_nodelists_node(int node) /* * The l3s don't come and go as CPUs come and - * go. cache_chain_mutex is sufficient + * go. slab_mutex is sufficient * protection here. */ cachep->nodelists[node] = l3; @@ -1191,7 +1140,7 @@ static void __cpuinit cpuup_canceled(long cpu) int node = cpu_to_mem(cpu); const struct cpumask *mask = cpumask_of_node(node); - list_for_each_entry(cachep, &cache_chain, next) { + list_for_each_entry(cachep, &slab_caches, list) { struct array_cache *nc; struct array_cache *shared; struct array_cache **alien; @@ -1241,7 +1190,7 @@ free_array_cache: * the respective cache's slabs, now we can go ahead and * shrink each nodelist to its limit. */ - list_for_each_entry(cachep, &cache_chain, next) { + list_for_each_entry(cachep, &slab_caches, list) { l3 = cachep->nodelists[node]; if (!l3) continue; @@ -1270,7 +1219,7 @@ static int __cpuinit cpuup_prepare(long cpu) * Now we can go ahead with allocating the shared arrays and * array caches */ - list_for_each_entry(cachep, &cache_chain, next) { + list_for_each_entry(cachep, &slab_caches, list) { struct array_cache *nc; struct array_cache *shared = NULL; struct array_cache **alien = NULL; @@ -1338,9 +1287,9 @@ static int __cpuinit cpuup_callback(struct notifier_block *nfb, switch (action) { case CPU_UP_PREPARE: case CPU_UP_PREPARE_FROZEN: - mutex_lock(&cache_chain_mutex); + mutex_lock(&slab_mutex); err = cpuup_prepare(cpu); - mutex_unlock(&cache_chain_mutex); + mutex_unlock(&slab_mutex); break; case CPU_ONLINE: case CPU_ONLINE_FROZEN: @@ -1350,7 +1299,7 @@ static int __cpuinit cpuup_callback(struct notifier_block *nfb, case CPU_DOWN_PREPARE: case CPU_DOWN_PREPARE_FROZEN: /* - * Shutdown cache reaper. Note that the cache_chain_mutex is + * Shutdown cache reaper. Note that the slab_mutex is * held so that if cache_reap() is invoked it cannot do * anything expensive but will only modify reap_work * and reschedule the timer. @@ -1377,9 +1326,9 @@ static int __cpuinit cpuup_callback(struct notifier_block *nfb, #endif case CPU_UP_CANCELED: case CPU_UP_CANCELED_FROZEN: - mutex_lock(&cache_chain_mutex); + mutex_lock(&slab_mutex); cpuup_canceled(cpu); - mutex_unlock(&cache_chain_mutex); + mutex_unlock(&slab_mutex); break; } return notifier_from_errno(err); @@ -1395,14 +1344,14 @@ static struct notifier_block __cpuinitdata cpucache_notifier = { * Returns -EBUSY if all objects cannot be drained so that the node is not * removed. * - * Must hold cache_chain_mutex. + * Must hold slab_mutex. */ static int __meminit drain_cache_nodelists_node(int node) { struct kmem_cache *cachep; int ret = 0; - list_for_each_entry(cachep, &cache_chain, next) { + list_for_each_entry(cachep, &slab_caches, list) { struct kmem_list3 *l3; l3 = cachep->nodelists[node]; @@ -1433,14 +1382,14 @@ static int __meminit slab_memory_callback(struct notifier_block *self, switch (action) { case MEM_GOING_ONLINE: - mutex_lock(&cache_chain_mutex); + mutex_lock(&slab_mutex); ret = init_cache_nodelists_node(nid); - mutex_unlock(&cache_chain_mutex); + mutex_unlock(&slab_mutex); break; case MEM_GOING_OFFLINE: - mutex_lock(&cache_chain_mutex); + mutex_lock(&slab_mutex); ret = drain_cache_nodelists_node(nid); - mutex_unlock(&cache_chain_mutex); + mutex_unlock(&slab_mutex); break; case MEM_ONLINE: case MEM_OFFLINE: @@ -1544,8 +1493,8 @@ void __init kmem_cache_init(void) node = numa_mem_id(); /* 1) create the cache_cache */ - INIT_LIST_HEAD(&cache_chain); - list_add(&cache_cache.next, &cache_chain); + INIT_LIST_HEAD(&slab_caches); + list_add(&cache_cache.list, &slab_caches); cache_cache.colour_off = cache_line_size(); cache_cache.array[smp_processor_id()] = &initarray_cache.cache; cache_cache.nodelists[node] = &initkmem_list3[CACHE_CACHE + node]; @@ -1553,18 +1502,16 @@ void __init kmem_cache_init(void) /* * struct kmem_cache size depends on nr_node_ids & nr_cpu_ids */ - cache_cache.buffer_size = offsetof(struct kmem_cache, array[nr_cpu_ids]) + + cache_cache.size = offsetof(struct kmem_cache, array[nr_cpu_ids]) + nr_node_ids * sizeof(struct kmem_list3 *); -#if DEBUG - cache_cache.obj_size = cache_cache.buffer_size; -#endif - cache_cache.buffer_size = ALIGN(cache_cache.buffer_size, + cache_cache.object_size = cache_cache.size; + cache_cache.size = ALIGN(cache_cache.size, cache_line_size()); cache_cache.reciprocal_buffer_size = - reciprocal_value(cache_cache.buffer_size); + reciprocal_value(cache_cache.size); for (order = 0; order < MAX_ORDER; order++) { - cache_estimate(order, cache_cache.buffer_size, + cache_estimate(order, cache_cache.size, cache_line_size(), 0, &left_over, &cache_cache.num); if (cache_cache.num) break; @@ -1585,7 +1532,7 @@ void __init kmem_cache_init(void) * bug. */ - sizes[INDEX_AC].cs_cachep = kmem_cache_create(names[INDEX_AC].name, + sizes[INDEX_AC].cs_cachep = __kmem_cache_create(names[INDEX_AC].name, sizes[INDEX_AC].cs_size, ARCH_KMALLOC_MINALIGN, ARCH_KMALLOC_FLAGS|SLAB_PANIC, @@ -1593,7 +1540,7 @@ void __init kmem_cache_init(void) if (INDEX_AC != INDEX_L3) { sizes[INDEX_L3].cs_cachep = - kmem_cache_create(names[INDEX_L3].name, + __kmem_cache_create(names[INDEX_L3].name, sizes[INDEX_L3].cs_size, ARCH_KMALLOC_MINALIGN, ARCH_KMALLOC_FLAGS|SLAB_PANIC, @@ -1611,14 +1558,14 @@ void __init kmem_cache_init(void) * allow tighter packing of the smaller caches. */ if (!sizes->cs_cachep) { - sizes->cs_cachep = kmem_cache_create(names->name, + sizes->cs_cachep = __kmem_cache_create(names->name, sizes->cs_size, ARCH_KMALLOC_MINALIGN, ARCH_KMALLOC_FLAGS|SLAB_PANIC, NULL); } #ifdef CONFIG_ZONE_DMA - sizes->cs_dmacachep = kmem_cache_create( + sizes->cs_dmacachep = __kmem_cache_create( names->name_dma, sizes->cs_size, ARCH_KMALLOC_MINALIGN, @@ -1676,27 +1623,27 @@ void __init kmem_cache_init(void) } } - g_cpucache_up = EARLY; + slab_state = UP; } void __init kmem_cache_init_late(void) { struct kmem_cache *cachep; - g_cpucache_up = LATE; + slab_state = UP; /* Annotate slab for lockdep -- annotate the malloc caches */ init_lock_keys(); /* 6) resize the head arrays to their final sizes */ - mutex_lock(&cache_chain_mutex); - list_for_each_entry(cachep, &cache_chain, next) + mutex_lock(&slab_mutex); + list_for_each_entry(cachep, &slab_caches, list) if (enable_cpucache(cachep, GFP_NOWAIT)) BUG(); - mutex_unlock(&cache_chain_mutex); + mutex_unlock(&slab_mutex); /* Done! */ - g_cpucache_up = FULL; + slab_state = FULL; /* * Register a cpu startup notifier callback that initializes @@ -1727,6 +1674,9 @@ static int __init cpucache_init(void) */ for_each_online_cpu(cpu) start_cpu_timer(cpu); + + /* Done! */ + slab_state = FULL; return 0; } __initcall(cpucache_init); @@ -1743,7 +1693,7 @@ slab_out_of_memory(struct kmem_cache *cachep, gfp_t gfpflags, int nodeid) "SLAB: Unable to allocate memory on node %d (gfp=0x%x)\n", nodeid, gfpflags); printk(KERN_WARNING " cache: %s, object size: %d, order: %d\n", - cachep->name, cachep->buffer_size, cachep->gfporder); + cachep->name, cachep->size, cachep->gfporder); for_each_online_node(node) { unsigned long active_objs = 0, num_objs = 0, free_objects = 0; @@ -1798,7 +1748,7 @@ static void *kmem_getpages(struct kmem_cache *cachep, gfp_t flags, int nodeid) flags |= __GFP_COMP; #endif - flags |= cachep->gfpflags; + flags |= cachep->allocflags; if (cachep->flags & SLAB_RECLAIM_ACCOUNT) flags |= __GFP_RECLAIMABLE; @@ -1874,7 +1824,7 @@ static void kmem_rcu_free(struct rcu_head *head) static void store_stackinfo(struct kmem_cache *cachep, unsigned long *addr, unsigned long caller) { - int size = obj_size(cachep); + int size = cachep->object_size; addr = (unsigned long *)&((char *)addr)[obj_offset(cachep)]; @@ -1906,7 +1856,7 @@ static void store_stackinfo(struct kmem_cache *cachep, unsigned long *addr, static void poison_obj(struct kmem_cache *cachep, void *addr, unsigned char val) { - int size = obj_size(cachep); + int size = cachep->object_size; addr = &((char *)addr)[obj_offset(cachep)]; memset(addr, val, size); @@ -1966,7 +1916,7 @@ static void print_objinfo(struct kmem_cache *cachep, void *objp, int lines) printk("\n"); } realobj = (char *)objp + obj_offset(cachep); - size = obj_size(cachep); + size = cachep->object_size; for (i = 0; i < size && lines; i += 16, lines--) { int limit; limit = 16; @@ -1983,7 +1933,7 @@ static void check_poison_obj(struct kmem_cache *cachep, void *objp) int lines = 0; realobj = (char *)objp + obj_offset(cachep); - size = obj_size(cachep); + size = cachep->object_size; for (i = 0; i < size; i++) { char exp = POISON_FREE; @@ -2047,10 +1997,10 @@ static void slab_destroy_debugcheck(struct kmem_cache *cachep, struct slab *slab if (cachep->flags & SLAB_POISON) { #ifdef CONFIG_DEBUG_PAGEALLOC - if (cachep->buffer_size % PAGE_SIZE == 0 && + if (cachep->size % PAGE_SIZE == 0 && OFF_SLAB(cachep)) kernel_map_pages(virt_to_page(objp), - cachep->buffer_size / PAGE_SIZE, 1); + cachep->size / PAGE_SIZE, 1); else check_poison_obj(cachep, objp); #else @@ -2194,10 +2144,10 @@ static size_t calculate_slab_order(struct kmem_cache *cachep, static int __init_refok setup_cpu_cache(struct kmem_cache *cachep, gfp_t gfp) { - if (g_cpucache_up == FULL) + if (slab_state >= FULL) return enable_cpucache(cachep, gfp); - if (g_cpucache_up == NONE) { + if (slab_state == DOWN) { /* * Note: the first kmem_cache_create must create the cache * that's used by kmalloc(24), otherwise the creation of @@ -2212,16 +2162,16 @@ static int __init_refok setup_cpu_cache(struct kmem_cache *cachep, gfp_t gfp) */ set_up_list3s(cachep, SIZE_AC); if (INDEX_AC == INDEX_L3) - g_cpucache_up = PARTIAL_L3; + slab_state = PARTIAL_L3; else - g_cpucache_up = PARTIAL_AC; + slab_state = PARTIAL_ARRAYCACHE; } else { cachep->array[smp_processor_id()] = kmalloc(sizeof(struct arraycache_init), gfp); - if (g_cpucache_up == PARTIAL_AC) { + if (slab_state == PARTIAL_ARRAYCACHE) { set_up_list3s(cachep, SIZE_L3); - g_cpucache_up = PARTIAL_L3; + slab_state = PARTIAL_L3; } else { int node; for_each_online_node(node) { @@ -2247,7 +2197,7 @@ static int __init_refok setup_cpu_cache(struct kmem_cache *cachep, gfp_t gfp) } /** - * kmem_cache_create - Create a cache. + * __kmem_cache_create - Create a cache. * @name: A string which is used in /proc/slabinfo to identify this cache. * @size: The size of objects to be created in this cache. * @align: The required alignment for the objects. @@ -2274,59 +2224,14 @@ static int __init_refok setup_cpu_cache(struct kmem_cache *cachep, gfp_t gfp) * as davem. */ struct kmem_cache * -kmem_cache_create (const char *name, size_t size, size_t align, +__kmem_cache_create (const char *name, size_t size, size_t align, unsigned long flags, void (*ctor)(void *)) { size_t left_over, slab_size, ralign; - struct kmem_cache *cachep = NULL, *pc; + struct kmem_cache *cachep = NULL; gfp_t gfp; - /* - * Sanity checks... these are all serious usage bugs. - */ - if (!name || in_interrupt() || (size < BYTES_PER_WORD) || - size > KMALLOC_MAX_SIZE) { - printk(KERN_ERR "%s: Early error in slab %s\n", __func__, - name); - BUG(); - } - - /* - * We use cache_chain_mutex to ensure a consistent view of - * cpu_online_mask as well. Please see cpuup_callback - */ - if (slab_is_available()) { - get_online_cpus(); - mutex_lock(&cache_chain_mutex); - } - - list_for_each_entry(pc, &cache_chain, next) { - char tmp; - int res; - - /* - * This happens when the module gets unloaded and doesn't - * destroy its slab cache and no-one else reuses the vmalloc - * area of the module. Print a warning. - */ - res = probe_kernel_address(pc->name, tmp); - if (res) { - printk(KERN_ERR - "SLAB: cache with size %d has lost its name\n", - pc->buffer_size); - continue; - } - - if (!strcmp(pc->name, name)) { - printk(KERN_ERR - "kmem_cache_create: duplicate cache %s\n", name); - dump_stack(); - goto oops; - } - } - #if DEBUG - WARN_ON(strchr(name, ' ')); /* It confuses parsers */ #if FORCED_DEBUG /* * Enable redzoning and last user accounting, except for caches with @@ -2415,11 +2320,12 @@ kmem_cache_create (const char *name, size_t size, size_t align, /* Get cache's description obj. */ cachep = kmem_cache_zalloc(&cache_cache, gfp); if (!cachep) - goto oops; + return NULL; cachep->nodelists = (struct kmem_list3 **)&cachep->array[nr_cpu_ids]; + cachep->object_size = size; + cachep->align = align; #if DEBUG - cachep->obj_size = size; /* * Both debugging options require word-alignment which is calculated @@ -2442,7 +2348,7 @@ kmem_cache_create (const char *name, size_t size, size_t align, } #if FORCED_DEBUG && defined(CONFIG_DEBUG_PAGEALLOC) if (size >= malloc_sizes[INDEX_L3 + 1].cs_size - && cachep->obj_size > cache_line_size() && ALIGN(size, align) < PAGE_SIZE) { + && cachep->object_size > cache_line_size() && ALIGN(size, align) < PAGE_SIZE) { cachep->obj_offset += PAGE_SIZE - ALIGN(size, align); size = PAGE_SIZE; } @@ -2471,8 +2377,7 @@ kmem_cache_create (const char *name, size_t size, size_t align, printk(KERN_ERR "kmem_cache_create: couldn't create cache %s.\n", name); kmem_cache_free(&cache_cache, cachep); - cachep = NULL; - goto oops; + return NULL; } slab_size = ALIGN(cachep->num * sizeof(kmem_bufctl_t) + sizeof(struct slab), align); @@ -2508,10 +2413,10 @@ kmem_cache_create (const char *name, size_t size, size_t align, cachep->colour = left_over / cachep->colour_off; cachep->slab_size = slab_size; cachep->flags = flags; - cachep->gfpflags = 0; + cachep->allocflags = 0; if (CONFIG_ZONE_DMA_FLAG && (flags & SLAB_CACHE_DMA)) - cachep->gfpflags |= GFP_DMA; - cachep->buffer_size = size; + cachep->allocflags |= GFP_DMA; + cachep->size = size; cachep->reciprocal_buffer_size = reciprocal_value(size); if (flags & CFLGS_OFF_SLAB) { @@ -2530,8 +2435,7 @@ kmem_cache_create (const char *name, size_t size, size_t align, if (setup_cpu_cache(cachep, gfp)) { __kmem_cache_destroy(cachep); - cachep = NULL; - goto oops; + return NULL; } if (flags & SLAB_DEBUG_OBJECTS) { @@ -2545,18 +2449,9 @@ kmem_cache_create (const char *name, size_t size, size_t align, } /* cache setup completed, link it into the list */ - list_add(&cachep->next, &cache_chain); -oops: - if (!cachep && (flags & SLAB_PANIC)) - panic("kmem_cache_create(): failed to create slab `%s'\n", - name); - if (slab_is_available()) { - mutex_unlock(&cache_chain_mutex); - put_online_cpus(); - } + list_add(&cachep->list, &slab_caches); return cachep; } -EXPORT_SYMBOL(kmem_cache_create); #if DEBUG static void check_irq_off(void) @@ -2671,7 +2566,7 @@ out: return nr_freed; } -/* Called with cache_chain_mutex held to protect against cpu hotplug */ +/* Called with slab_mutex held to protect against cpu hotplug */ static int __cache_shrink(struct kmem_cache *cachep) { int ret = 0, i = 0; @@ -2706,9 +2601,9 @@ int kmem_cache_shrink(struct kmem_cache *cachep) BUG_ON(!cachep || in_interrupt()); get_online_cpus(); - mutex_lock(&cache_chain_mutex); + mutex_lock(&slab_mutex); ret = __cache_shrink(cachep); - mutex_unlock(&cache_chain_mutex); + mutex_unlock(&slab_mutex); put_online_cpus(); return ret; } @@ -2736,15 +2631,15 @@ void kmem_cache_destroy(struct kmem_cache *cachep) /* Find the cache in the chain of caches. */ get_online_cpus(); - mutex_lock(&cache_chain_mutex); + mutex_lock(&slab_mutex); /* * the chain is never empty, cache_cache is never destroyed */ - list_del(&cachep->next); + list_del(&cachep->list); if (__cache_shrink(cachep)) { slab_error(cachep, "Can't free all objects"); - list_add(&cachep->next, &cache_chain); - mutex_unlock(&cache_chain_mutex); + list_add(&cachep->list, &slab_caches); + mutex_unlock(&slab_mutex); put_online_cpus(); return; } @@ -2753,7 +2648,7 @@ void kmem_cache_destroy(struct kmem_cache *cachep) rcu_barrier(); __kmem_cache_destroy(cachep); - mutex_unlock(&cache_chain_mutex); + mutex_unlock(&slab_mutex); put_online_cpus(); } EXPORT_SYMBOL(kmem_cache_destroy); @@ -2840,10 +2735,10 @@ static void cache_init_objs(struct kmem_cache *cachep, slab_error(cachep, "constructor overwrote the" " start of an object"); } - if ((cachep->buffer_size % PAGE_SIZE) == 0 && + if ((cachep->size % PAGE_SIZE) == 0 && OFF_SLAB(cachep) && cachep->flags & SLAB_POISON) kernel_map_pages(virt_to_page(objp), - cachep->buffer_size / PAGE_SIZE, 0); + cachep->size / PAGE_SIZE, 0); #else if (cachep->ctor) cachep->ctor(objp); @@ -2857,9 +2752,9 @@ static void kmem_flagcheck(struct kmem_cache *cachep, gfp_t flags) { if (CONFIG_ZONE_DMA_FLAG) { if (flags & GFP_DMA) - BUG_ON(!(cachep->gfpflags & GFP_DMA)); + BUG_ON(!(cachep->allocflags & GFP_DMA)); else - BUG_ON(cachep->gfpflags & GFP_DMA); + BUG_ON(cachep->allocflags & GFP_DMA); } } @@ -2918,8 +2813,8 @@ static void slab_map_pages(struct kmem_cache *cache, struct slab *slab, nr_pages <<= cache->gfporder; do { - page_set_cache(page, cache); - page_set_slab(page, slab); + page->slab_cache = cache; + page->slab_page = slab; page++; } while (--nr_pages); } @@ -3057,7 +2952,7 @@ static void *cache_free_debugcheck(struct kmem_cache *cachep, void *objp, kfree_debugcheck(objp); page = virt_to_head_page(objp); - slabp = page_get_slab(page); + slabp = page->slab_page; if (cachep->flags & SLAB_RED_ZONE) { verify_redzone_free(cachep, objp); @@ -3077,10 +2972,10 @@ static void *cache_free_debugcheck(struct kmem_cache *cachep, void *objp, #endif if (cachep->flags & SLAB_POISON) { #ifdef CONFIG_DEBUG_PAGEALLOC - if ((cachep->buffer_size % PAGE_SIZE)==0 && OFF_SLAB(cachep)) { + if ((cachep->size % PAGE_SIZE)==0 && OFF_SLAB(cachep)) { store_stackinfo(cachep, objp, (unsigned long)caller); kernel_map_pages(virt_to_page(objp), - cachep->buffer_size / PAGE_SIZE, 0); + cachep->size / PAGE_SIZE, 0); } else { poison_obj(cachep, objp, POISON_FREE); } @@ -3230,9 +3125,9 @@ static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep, return objp; if (cachep->flags & SLAB_POISON) { #ifdef CONFIG_DEBUG_PAGEALLOC - if ((cachep->buffer_size % PAGE_SIZE) == 0 && OFF_SLAB(cachep)) + if ((cachep->size % PAGE_SIZE) == 0 && OFF_SLAB(cachep)) kernel_map_pages(virt_to_page(objp), - cachep->buffer_size / PAGE_SIZE, 1); + cachep->size / PAGE_SIZE, 1); else check_poison_obj(cachep, objp); #else @@ -3261,8 +3156,8 @@ static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep, struct slab *slabp; unsigned objnr; - slabp = page_get_slab(virt_to_head_page(objp)); - objnr = (unsigned)(objp - slabp->s_mem) / cachep->buffer_size; + slabp = virt_to_head_page(objp)->slab_page; + objnr = (unsigned)(objp - slabp->s_mem) / cachep->size; slab_bufctl(slabp)[objnr] = BUFCTL_ACTIVE; } #endif @@ -3285,7 +3180,7 @@ static bool slab_should_failslab(struct kmem_cache *cachep, gfp_t flags) if (cachep == &cache_cache) return false; - return should_failslab(obj_size(cachep), flags, cachep->flags); + return should_failslab(cachep->object_size, flags, cachep->flags); } static inline void *____cache_alloc(struct kmem_cache *cachep, gfp_t flags) @@ -3336,7 +3231,7 @@ static void *alternate_node_alloc(struct kmem_cache *cachep, gfp_t flags) if (cpuset_do_slab_mem_spread() && (cachep->flags & SLAB_MEM_SPREAD)) nid_alloc = cpuset_slab_spread_node(); else if (current->mempolicy) - nid_alloc = slab_node(current->mempolicy); + nid_alloc = slab_node(); if (nid_alloc != nid_here) return ____cache_alloc_node(cachep, flags, nid_alloc); return NULL; @@ -3368,7 +3263,7 @@ static void *fallback_alloc(struct kmem_cache *cache, gfp_t flags) retry_cpuset: cpuset_mems_cookie = get_mems_allowed(); - zonelist = node_zonelist(slab_node(current->mempolicy), flags); + zonelist = node_zonelist(slab_node(), flags); retry: /* @@ -3545,14 +3440,14 @@ __cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid, out: local_irq_restore(save_flags); ptr = cache_alloc_debugcheck_after(cachep, flags, ptr, caller); - kmemleak_alloc_recursive(ptr, obj_size(cachep), 1, cachep->flags, + kmemleak_alloc_recursive(ptr, cachep->object_size, 1, cachep->flags, flags); if (likely(ptr)) - kmemcheck_slab_alloc(cachep, flags, ptr, obj_size(cachep)); + kmemcheck_slab_alloc(cachep, flags, ptr, cachep->object_size); if (unlikely((flags & __GFP_ZERO) && ptr)) - memset(ptr, 0, obj_size(cachep)); + memset(ptr, 0, cachep->object_size); return ptr; } @@ -3607,15 +3502,15 @@ __cache_alloc(struct kmem_cache *cachep, gfp_t flags, void *caller) objp = __do_cache_alloc(cachep, flags); local_irq_restore(save_flags); objp = cache_alloc_debugcheck_after(cachep, flags, objp, caller); - kmemleak_alloc_recursive(objp, obj_size(cachep), 1, cachep->flags, + kmemleak_alloc_recursive(objp, cachep->object_size, 1, cachep->flags, flags); prefetchw(objp); if (likely(objp)) - kmemcheck_slab_alloc(cachep, flags, objp, obj_size(cachep)); + kmemcheck_slab_alloc(cachep, flags, objp, cachep->object_size); if (unlikely((flags & __GFP_ZERO) && objp)) - memset(objp, 0, obj_size(cachep)); + memset(objp, 0, cachep->object_size); return objp; } @@ -3731,7 +3626,7 @@ static inline void __cache_free(struct kmem_cache *cachep, void *objp, kmemleak_free_recursive(objp, cachep->flags); objp = cache_free_debugcheck(cachep, objp, caller); - kmemcheck_slab_free(cachep, objp, obj_size(cachep)); + kmemcheck_slab_free(cachep, objp, cachep->object_size); /* * Skip calling cache_free_alien() when the platform is not numa. @@ -3766,7 +3661,7 @@ void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags) void *ret = __cache_alloc(cachep, flags, __builtin_return_address(0)); trace_kmem_cache_alloc(_RET_IP_, ret, - obj_size(cachep), cachep->buffer_size, flags); + cachep->object_size, cachep->size, flags); return ret; } @@ -3794,7 +3689,7 @@ void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid) __builtin_return_address(0)); trace_kmem_cache_alloc_node(_RET_IP_, ret, - obj_size(cachep), cachep->buffer_size, + cachep->object_size, cachep->size, flags, nodeid); return ret; @@ -3876,7 +3771,7 @@ static __always_inline void *__do_kmalloc(size_t size, gfp_t flags, ret = __cache_alloc(cachep, flags, caller); trace_kmalloc((unsigned long) caller, ret, - size, cachep->buffer_size, flags); + size, cachep->size, flags); return ret; } @@ -3916,9 +3811,9 @@ void kmem_cache_free(struct kmem_cache *cachep, void *objp) unsigned long flags; local_irq_save(flags); - debug_check_no_locks_freed(objp, obj_size(cachep)); + debug_check_no_locks_freed(objp, cachep->object_size); if (!(cachep->flags & SLAB_DEBUG_OBJECTS)) - debug_check_no_obj_freed(objp, obj_size(cachep)); + debug_check_no_obj_freed(objp, cachep->object_size); __cache_free(cachep, objp, __builtin_return_address(0)); local_irq_restore(flags); @@ -3947,8 +3842,9 @@ void kfree(const void *objp) local_irq_save(flags); kfree_debugcheck(objp); c = virt_to_cache(objp); - debug_check_no_locks_freed(objp, obj_size(c)); - debug_check_no_obj_freed(objp, obj_size(c)); + debug_check_no_locks_freed(objp, c->object_size); + + debug_check_no_obj_freed(objp, c->object_size); __cache_free(c, (void *)objp, __builtin_return_address(0)); local_irq_restore(flags); } @@ -3956,7 +3852,7 @@ EXPORT_SYMBOL(kfree); unsigned int kmem_cache_size(struct kmem_cache *cachep) { - return obj_size(cachep); + return cachep->object_size; } EXPORT_SYMBOL(kmem_cache_size); @@ -4030,7 +3926,7 @@ static int alloc_kmemlist(struct kmem_cache *cachep, gfp_t gfp) return 0; fail: - if (!cachep->next.next) { + if (!cachep->list.next) { /* Cache is not active yet. Roll back what we did */ node--; while (node >= 0) { @@ -4065,7 +3961,7 @@ static void do_ccupdate_local(void *info) new->new[smp_processor_id()] = old; } -/* Always called with the cache_chain_mutex held */ +/* Always called with the slab_mutex held */ static int do_tune_cpucache(struct kmem_cache *cachep, int limit, int batchcount, int shared, gfp_t gfp) { @@ -4109,7 +4005,7 @@ static int do_tune_cpucache(struct kmem_cache *cachep, int limit, return alloc_kmemlist(cachep, gfp); } -/* Called with cache_chain_mutex held always */ +/* Called with slab_mutex held always */ static int enable_cpucache(struct kmem_cache *cachep, gfp_t gfp) { int err; @@ -4124,13 +4020,13 @@ static int enable_cpucache(struct kmem_cache *cachep, gfp_t gfp) * The numbers are guessed, we should auto-tune as described by * Bonwick. */ - if (cachep->buffer_size > 131072) + if (cachep->size > 131072) limit = 1; - else if (cachep->buffer_size > PAGE_SIZE) + else if (cachep->size > PAGE_SIZE) limit = 8; - else if (cachep->buffer_size > 1024) + else if (cachep->size > 1024) limit = 24; - else if (cachep->buffer_size > 256) + else if (cachep->size > 256) limit = 54; else limit = 120; @@ -4145,7 +4041,7 @@ static int enable_cpucache(struct kmem_cache *cachep, gfp_t gfp) * to a larger limit. Thus disabled by default. */ shared = 0; - if (cachep->buffer_size <= PAGE_SIZE && num_possible_cpus() > 1) + if (cachep->size <= PAGE_SIZE && num_possible_cpus() > 1) shared = 8; #if DEBUG @@ -4211,11 +4107,11 @@ static void cache_reap(struct work_struct *w) int node = numa_mem_id(); struct delayed_work *work = to_delayed_work(w); - if (!mutex_trylock(&cache_chain_mutex)) + if (!mutex_trylock(&slab_mutex)) /* Give up. Setup the next iteration. */ goto out; - list_for_each_entry(searchp, &cache_chain, next) { + list_for_each_entry(searchp, &slab_caches, list) { check_irq_on(); /* @@ -4253,7 +4149,7 @@ next: cond_resched(); } check_irq_on(); - mutex_unlock(&cache_chain_mutex); + mutex_unlock(&slab_mutex); next_reap_node(); out: /* Set up the next iteration */ @@ -4289,26 +4185,26 @@ static void *s_start(struct seq_file *m, loff_t *pos) { loff_t n = *pos; - mutex_lock(&cache_chain_mutex); + mutex_lock(&slab_mutex); if (!n) print_slabinfo_header(m); - return seq_list_start(&cache_chain, *pos); + return seq_list_start(&slab_caches, *pos); } static void *s_next(struct seq_file *m, void *p, loff_t *pos) { - return seq_list_next(p, &cache_chain, pos); + return seq_list_next(p, &slab_caches, pos); } static void s_stop(struct seq_file *m, void *p) { - mutex_unlock(&cache_chain_mutex); + mutex_unlock(&slab_mutex); } static int s_show(struct seq_file *m, void *p) { - struct kmem_cache *cachep = list_entry(p, struct kmem_cache, next); + struct kmem_cache *cachep = list_entry(p, struct kmem_cache, list); struct slab *slabp; unsigned long active_objs; unsigned long num_objs; @@ -4364,7 +4260,7 @@ static int s_show(struct seq_file *m, void *p) printk(KERN_ERR "slab: cache %s error: %s\n", name, error); seq_printf(m, "%-17s %6lu %6lu %6u %4u %4d", - name, active_objs, num_objs, cachep->buffer_size, + name, active_objs, num_objs, cachep->size, cachep->num, (1 << cachep->gfporder)); seq_printf(m, " : tunables %4u %4u %4u", cachep->limit, cachep->batchcount, cachep->shared); @@ -4454,9 +4350,9 @@ static ssize_t slabinfo_write(struct file *file, const char __user *buffer, return -EINVAL; /* Find the cache in the chain of caches. */ - mutex_lock(&cache_chain_mutex); + mutex_lock(&slab_mutex); res = -EINVAL; - list_for_each_entry(cachep, &cache_chain, next) { + list_for_each_entry(cachep, &slab_caches, list) { if (!strcmp(cachep->name, kbuf)) { if (limit < 1 || batchcount < 1 || batchcount > limit || shared < 0) { @@ -4469,7 +4365,7 @@ static ssize_t slabinfo_write(struct file *file, const char __user *buffer, break; } } - mutex_unlock(&cache_chain_mutex); + mutex_unlock(&slab_mutex); if (res >= 0) res = count; return res; @@ -4492,8 +4388,8 @@ static const struct file_operations proc_slabinfo_operations = { static void *leaks_start(struct seq_file *m, loff_t *pos) { - mutex_lock(&cache_chain_mutex); - return seq_list_start(&cache_chain, *pos); + mutex_lock(&slab_mutex); + return seq_list_start(&slab_caches, *pos); } static inline int add_caller(unsigned long *n, unsigned long v) @@ -4532,7 +4428,7 @@ static void handle_slab(unsigned long *n, struct kmem_cache *c, struct slab *s) int i; if (n[0] == n[1]) return; - for (i = 0, p = s->s_mem; i < c->num; i++, p += c->buffer_size) { + for (i = 0, p = s->s_mem; i < c->num; i++, p += c->size) { if (slab_bufctl(s)[i] != BUFCTL_ACTIVE) continue; if (!add_caller(n, (unsigned long)*dbg_userword(c, p))) @@ -4558,7 +4454,7 @@ static void show_symbol(struct seq_file *m, unsigned long address) static int leaks_show(struct seq_file *m, void *p) { - struct kmem_cache *cachep = list_entry(p, struct kmem_cache, next); + struct kmem_cache *cachep = list_entry(p, struct kmem_cache, list); struct slab *slabp; struct kmem_list3 *l3; const char *name; @@ -4592,17 +4488,17 @@ static int leaks_show(struct seq_file *m, void *p) name = cachep->name; if (n[0] == n[1]) { /* Increase the buffer size */ - mutex_unlock(&cache_chain_mutex); + mutex_unlock(&slab_mutex); m->private = kzalloc(n[0] * 4 * sizeof(unsigned long), GFP_KERNEL); if (!m->private) { /* Too bad, we are really out */ m->private = n; - mutex_lock(&cache_chain_mutex); + mutex_lock(&slab_mutex); return -ENOMEM; } *(unsigned long *)m->private = n[0] * 2; kfree(n); - mutex_lock(&cache_chain_mutex); + mutex_lock(&slab_mutex); /* Now make sure this entry will be retried */ m->count = m->size; return 0; @@ -4677,6 +4573,6 @@ size_t ksize(const void *objp) if (unlikely(objp == ZERO_SIZE_PTR)) return 0; - return obj_size(virt_to_cache(objp)); + return virt_to_cache(objp)->object_size; } EXPORT_SYMBOL(ksize);