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mm/sl[aou]b: Use "kmem_cache" name for slab cache with kmem_cache struct 

Make all allocators use the "kmem_cache" slabname for the "kmem_cache"
structure.

Reviewed-by: Glauber Costa <glommer@parallels.com>
Reviewed-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Christoph Lameter 2012-09-05 00:20:33 +00:00 committed by Pekka Enberg
parent 945cf2b619
commit 9b030cb865
5 changed files with 52 additions and 37 deletions
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72
mm/slab.c
View File

@ -578,9 +578,9 @@ static struct arraycache_init initarray_generic =
{ {0, BOOT_CPUCACHE_ENTRIES, 1, 0} };
/* internal cache of cache description objs */
static struct kmem_list3 *cache_cache_nodelists[MAX_NUMNODES];
static struct kmem_cache cache_cache = {
.nodelists = cache_cache_nodelists,
static struct kmem_list3 *kmem_cache_nodelists[MAX_NUMNODES];
static struct kmem_cache kmem_cache_boot = {
.nodelists = kmem_cache_nodelists,
.batchcount = 1,
.limit = BOOT_CPUCACHE_ENTRIES,
.shared = 1,
@ -1594,15 +1594,17 @@ void __init kmem_cache_init(void)
int order;
int node;
kmem_cache = &kmem_cache_boot;
if (num_possible_nodes() == 1)
use_alien_caches = 0;
for (i = 0; i < NUM_INIT_LISTS; i++) {
kmem_list3_init(&initkmem_list3[i]);
if (i < MAX_NUMNODES)
cache_cache.nodelists[i] = NULL;
kmem_cache->nodelists[i] = NULL;
}
set_up_list3s(&cache_cache, CACHE_CACHE);
set_up_list3s(kmem_cache, CACHE_CACHE);
/*
* Fragmentation resistance on low memory - only use bigger
@ -1614,9 +1616,9 @@ void __init kmem_cache_init(void)
/* Bootstrap is tricky, because several objects are allocated
* from caches that do not exist yet:
* 1) initialize the cache_cache cache: it contains the struct
* kmem_cache structures of all caches, except cache_cache itself:
* cache_cache is statically allocated.
* 1) initialize the kmem_cache cache: it contains the struct
* kmem_cache structures of all caches, except kmem_cache itself:
* kmem_cache is statically allocated.
* Initially an __init data area is used for the head array and the
* kmem_list3 structures, it's replaced with a kmalloc allocated
* array at the end of the bootstrap.
@ -1625,43 +1627,43 @@ void __init kmem_cache_init(void)
* An __init data area is used for the head array.
* 3) Create the remaining kmalloc caches, with minimally sized
* head arrays.
* 4) Replace the __init data head arrays for cache_cache and the first
* 4) Replace the __init data head arrays for kmem_cache and the first
* kmalloc cache with kmalloc allocated arrays.
* 5) Replace the __init data for kmem_list3 for cache_cache and
* 5) Replace the __init data for kmem_list3 for kmem_cache and
* the other cache's with kmalloc allocated memory.
* 6) Resize the head arrays of the kmalloc caches to their final sizes.
*/
node = numa_mem_id();
/* 1) create the cache_cache */
/* 1) create the kmem_cache */
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];
list_add(&kmem_cache->list, &slab_caches);
kmem_cache->colour_off = cache_line_size();
kmem_cache->array[smp_processor_id()] = &initarray_cache.cache;
kmem_cache->nodelists[node] = &initkmem_list3[CACHE_CACHE + node];
/*
* struct kmem_cache size depends on nr_node_ids & nr_cpu_ids
*/
cache_cache.size = offsetof(struct kmem_cache, array[nr_cpu_ids]) +
kmem_cache->size = offsetof(struct kmem_cache, array[nr_cpu_ids]) +
nr_node_ids * sizeof(struct kmem_list3 *);
cache_cache.object_size = cache_cache.size;
cache_cache.size = ALIGN(cache_cache.size,
kmem_cache->object_size = kmem_cache->size;
kmem_cache->size = ALIGN(kmem_cache->object_size,
cache_line_size());
cache_cache.reciprocal_buffer_size =
reciprocal_value(cache_cache.size);
kmem_cache->reciprocal_buffer_size =
reciprocal_value(kmem_cache->size);
for (order = 0; order < MAX_ORDER; order++) {
cache_estimate(order, cache_cache.size,
cache_line_size(), 0, &left_over, &cache_cache.num);
if (cache_cache.num)
cache_estimate(order, kmem_cache->size,
cache_line_size(), 0, &left_over, &kmem_cache->num);
if (kmem_cache->num)
break;
}
BUG_ON(!cache_cache.num);
cache_cache.gfporder = order;
cache_cache.colour = left_over / cache_cache.colour_off;
cache_cache.slab_size = ALIGN(cache_cache.num * sizeof(kmem_bufctl_t) +
BUG_ON(!kmem_cache->num);
kmem_cache->gfporder = order;
kmem_cache->colour = left_over / kmem_cache->colour_off;
kmem_cache->slab_size = ALIGN(kmem_cache->num * sizeof(kmem_bufctl_t) +
sizeof(struct slab), cache_line_size());
/* 2+3) create the kmalloc caches */
@ -1728,15 +1730,15 @@ void __init kmem_cache_init(void)
ptr = kmalloc(sizeof(struct arraycache_init), GFP_NOWAIT);
BUG_ON(cpu_cache_get(&cache_cache) != &initarray_cache.cache);
memcpy(ptr, cpu_cache_get(&cache_cache),
BUG_ON(cpu_cache_get(kmem_cache) != &initarray_cache.cache);
memcpy(ptr, cpu_cache_get(kmem_cache),
sizeof(struct arraycache_init));
/*
* Do not assume that spinlocks can be initialized via memcpy:
*/
spin_lock_init(&ptr->lock);
cache_cache.array[smp_processor_id()] = ptr;
kmem_cache->array[smp_processor_id()] = ptr;
ptr = kmalloc(sizeof(struct arraycache_init), GFP_NOWAIT);
@ -1757,7 +1759,7 @@ void __init kmem_cache_init(void)
int nid;
for_each_online_node(nid) {
init_list(&cache_cache, &initkmem_list3[CACHE_CACHE + nid], nid);
init_list(kmem_cache, &initkmem_list3[CACHE_CACHE + nid], nid);
init_list(malloc_sizes[INDEX_AC].cs_cachep,
&initkmem_list3[SIZE_AC + nid], nid);
@ -2223,7 +2225,7 @@ void __kmem_cache_destroy(struct kmem_cache *cachep)
kfree(l3);
}
}
kmem_cache_free(&cache_cache, cachep);
kmem_cache_free(kmem_cache, cachep);
}
@ -2473,7 +2475,7 @@ __kmem_cache_create (const char *name, size_t size, size_t align,
gfp = GFP_NOWAIT;
/* Get cache's description obj. */
cachep = kmem_cache_zalloc(&cache_cache, gfp);
cachep = kmem_cache_zalloc(kmem_cache, gfp);
if (!cachep)
return NULL;
@ -2531,7 +2533,7 @@ __kmem_cache_create (const char *name, size_t size, size_t align,
if (!cachep->num) {
printk(KERN_ERR
"kmem_cache_create: couldn't create cache %s.\n", name);
kmem_cache_free(&cache_cache, cachep);
kmem_cache_free(kmem_cache, cachep);
return NULL;
}
slab_size = ALIGN(cachep->num * sizeof(kmem_bufctl_t)
@ -3299,7 +3301,7 @@ static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep,
static bool slab_should_failslab(struct kmem_cache *cachep, gfp_t flags)
{
if (cachep == &cache_cache)
if (cachep == kmem_cache)
return false;
return should_failslab(cachep->object_size, flags, cachep->flags);

6
mm/slab.h
View File

@ -25,8 +25,14 @@ extern enum slab_state slab_state;
/* The slab cache mutex protects the management structures during changes */
extern struct mutex slab_mutex;
/* The list of all slab caches on the system */
extern struct list_head slab_caches;
/* The slab cache that manages slab cache information */
extern struct kmem_cache *kmem_cache;
/* Functions provided by the slab allocators */
struct kmem_cache *__kmem_cache_create(const char *name, size_t size,
size_t align, unsigned long flags, void (*ctor)(void *));

1
mm/slab_common.c
View File

@ -22,6 +22,7 @@
enum slab_state slab_state;
LIST_HEAD(slab_caches);
DEFINE_MUTEX(slab_mutex);
struct kmem_cache *kmem_cache;
#ifdef CONFIG_DEBUG_VM
static int kmem_cache_sanity_check(const char *name, size_t size)

8
mm/slob.c
View File

@ -622,8 +622,16 @@ int kmem_cache_shrink(struct kmem_cache *d)
}
EXPORT_SYMBOL(kmem_cache_shrink);
struct kmem_cache kmem_cache_boot = {
.name = "kmem_cache",
.size = sizeof(struct kmem_cache),
.flags = SLAB_PANIC,
.align = ARCH_KMALLOC_MINALIGN,
};
void __init kmem_cache_init(void)
{
kmem_cache = &kmem_cache_boot;
slab_state = UP;
}

2
mm/slub.c
View File

@ -3221,8 +3221,6 @@ void __kmem_cache_destroy(struct kmem_cache *s)
struct kmem_cache *kmalloc_caches[SLUB_PAGE_SHIFT];
EXPORT_SYMBOL(kmalloc_caches);
static struct kmem_cache *kmem_cache;
#ifdef CONFIG_ZONE_DMA
static struct kmem_cache *kmalloc_dma_caches[SLUB_PAGE_SHIFT];
#endif