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authorChristoph Lameter <cl@linux.com>2012-07-06 15:25:11 -0500
committerPekka Enberg <penberg@kernel.org>2012-07-09 12:13:35 +0300
commit97d06609158e61f6bdf538c4a6788e2de492236f (patch)
treefa3f57ff3e2d3f4f866d84dd9d634ade43941be8 /mm/slab.c
parent039363f38bfe5f6281e9eae5e0518b11577d9d50 (diff)
mm, sl[aou]b: Common definition for boot state of the slab allocators
All allocators have some sort of support for the bootstrap status. Setup a common definition for the boot states and make all slab allocators use that definition. 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>
Diffstat (limited to 'mm/slab.c')
-rw-r--r--mm/slab.c45
1 files changed, 14 insertions, 31 deletions
diff --git a/mm/slab.c b/mm/slab.c
index 10c821e492b..59a466b85b0 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -87,6 +87,7 @@
*/
#include <linux/slab.h>
+#include "slab.h"
#include <linux/mm.h>
#include <linux/poison.h>
#include <linux/swap.h>
@@ -565,27 +566,6 @@ static struct kmem_cache cache_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
/*
@@ -651,7 +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++) {
@@ -1649,14 +1629,14 @@ 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();
@@ -1668,6 +1648,9 @@ void __init kmem_cache_init_late(void)
BUG();
mutex_unlock(&cache_chain_mutex);
+ /* Done! */
+ slab_state = FULL;
+
/*
* Register a cpu startup notifier callback that initializes
* cpu_cache_get for all new cpus
@@ -1699,7 +1682,7 @@ static int __init cpucache_init(void)
start_cpu_timer(cpu);
/* Done! */
- g_cpucache_up = FULL;
+ slab_state = FULL;
return 0;
}
__initcall(cpucache_init);
@@ -2167,10 +2150,10 @@ 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 >= LATE)
+ 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
@@ -2185,16 +2168,16 @@ 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) {