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-rw-r--r--mm/slab.c117
1 files changed, 58 insertions, 59 deletions
diff --git a/mm/slab.c b/mm/slab.c
index 28a8f7d29d4a..e2b3907b7b0c 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -424,8 +424,8 @@ 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)
@@ -435,7 +435,7 @@ static int obj_offset(struct kmem_cache *cachep)
static int obj_size(struct kmem_cache *cachep)
{
- return cachep->obj_size;
+ return cachep->object_size;
}
static unsigned long long *dbg_redzone1(struct kmem_cache *cachep, void *objp)
@@ -449,23 +449,23 @@ 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 obj_size(cachep) (cachep->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 +475,7 @@ 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
@@ -513,13 +513,13 @@ static inline struct slab *virt_to_slab(const void *obj)
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,
@@ -565,7 +565,7 @@ 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",
};
@@ -1134,7 +1134,7 @@ 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, &cache_chain, list) {
/*
* Set up the size64 kmemlist for cpu before we can
* begin anything. Make sure some other cpu on this
@@ -1172,7 +1172,7 @@ 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, &cache_chain, list) {
struct array_cache *nc;
struct array_cache *shared;
struct array_cache **alien;
@@ -1222,7 +1222,7 @@ 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, &cache_chain, list) {
l3 = cachep->nodelists[node];
if (!l3)
continue;
@@ -1251,7 +1251,7 @@ 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, &cache_chain, list) {
struct array_cache *nc;
struct array_cache *shared = NULL;
struct array_cache **alien = NULL;
@@ -1383,7 +1383,7 @@ 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, &cache_chain, list) {
struct kmem_list3 *l3;
l3 = cachep->nodelists[node];
@@ -1526,7 +1526,7 @@ void __init kmem_cache_init(void)
/* 1) create the cache_cache */
INIT_LIST_HEAD(&cache_chain);
- list_add(&cache_cache.next, &cache_chain);
+ list_add(&cache_cache.list, &cache_chain);
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];
@@ -1534,18 +1534,16 @@ 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;
@@ -1671,7 +1669,7 @@ void __init kmem_cache_init_late(void)
/* 6) resize the head arrays to their final sizes */
mutex_lock(&cache_chain_mutex);
- list_for_each_entry(cachep, &cache_chain, next)
+ list_for_each_entry(cachep, &cache_chain, list)
if (enable_cpucache(cachep, GFP_NOWAIT))
BUG();
mutex_unlock(&cache_chain_mutex);
@@ -1724,7 +1722,7 @@ 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;
@@ -2028,10 +2026,10 @@ 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
@@ -2281,7 +2279,7 @@ kmem_cache_create (const char *name, size_t size, size_t align,
mutex_lock(&cache_chain_mutex);
}
- list_for_each_entry(pc, &cache_chain, next) {
+ list_for_each_entry(pc, &cache_chain, list) {
char tmp;
int res;
@@ -2294,7 +2292,7 @@ kmem_cache_create (const char *name, size_t size, size_t align,
if (res) {
printk(KERN_ERR
"SLAB: cache with size %d has lost its name\n",
- pc->buffer_size);
+ pc->size);
continue;
}
@@ -2399,8 +2397,9 @@ kmem_cache_create (const char *name, size_t size, size_t align,
goto oops;
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
@@ -2423,7 +2422,7 @@ 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;
}
@@ -2492,7 +2491,7 @@ kmem_cache_create (const char *name, size_t size, size_t align,
cachep->gfpflags = 0;
if (CONFIG_ZONE_DMA_FLAG && (flags & SLAB_CACHE_DMA))
cachep->gfpflags |= GFP_DMA;
- cachep->buffer_size = size;
+ cachep->size = size;
cachep->reciprocal_buffer_size = reciprocal_value(size);
if (flags & CFLGS_OFF_SLAB) {
@@ -2526,7 +2525,7 @@ 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);
+ list_add(&cachep->list, &cache_chain);
oops:
if (!cachep && (flags & SLAB_PANIC))
panic("kmem_cache_create(): failed to create slab `%s'\n",
@@ -2721,10 +2720,10 @@ void kmem_cache_destroy(struct kmem_cache *cachep)
/*
* 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);
+ list_add(&cachep->list, &cache_chain);
mutex_unlock(&cache_chain_mutex);
put_online_cpus();
return;
@@ -2821,10 +2820,10 @@ 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);
@@ -3058,10 +3057,10 @@ 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);
}
@@ -3211,9 +3210,9 @@ 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
@@ -3243,7 +3242,7 @@ static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep,
unsigned objnr;
slabp = virt_to_head_page(objp)->slab_page;
- objnr = (unsigned)(objp - slabp->s_mem) / cachep->buffer_size;
+ objnr = (unsigned)(objp - slabp->s_mem) / cachep->size;
slab_bufctl(slabp)[objnr] = BUFCTL_ACTIVE;
}
#endif
@@ -3747,7 +3746,7 @@ 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);
+ obj_size(cachep), cachep->size, flags);
return ret;
}
@@ -3775,7 +3774,7 @@ 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,
+ obj_size(cachep), cachep->size,
flags, nodeid);
return ret;
@@ -3857,7 +3856,7 @@ 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;
}
@@ -4011,7 +4010,7 @@ 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) {
@@ -4105,13 +4104,13 @@ 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;
@@ -4126,7 +4125,7 @@ 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
@@ -4196,7 +4195,7 @@ static void cache_reap(struct work_struct *w)
/* Give up. Setup the next iteration. */
goto out;
- list_for_each_entry(searchp, &cache_chain, next) {
+ list_for_each_entry(searchp, &cache_chain, list) {
check_irq_on();
/*
@@ -4289,7 +4288,7 @@ static void s_stop(struct seq_file *m, void *p)
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;
@@ -4345,7 +4344,7 @@ 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);
@@ -4437,7 +4436,7 @@ static ssize_t slabinfo_write(struct file *file, const char __user *buffer,
/* Find the cache in the chain of caches. */
mutex_lock(&cache_chain_mutex);
res = -EINVAL;
- list_for_each_entry(cachep, &cache_chain, next) {
+ list_for_each_entry(cachep, &cache_chain, list) {
if (!strcmp(cachep->name, kbuf)) {
if (limit < 1 || batchcount < 1 ||
batchcount > limit || shared < 0) {
@@ -4513,7 +4512,7 @@ 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)))
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-07 19:03:04 +0200