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mm/sl[aou]b: Shrink __kmem_cache_create() parameter lists 

Do the initial settings of the fields in common code. This will allow us
to push more processing into common code later and improve readability.

Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Christoph Lameter 2012-09-04 23:18:33 +00:00 committed by Pekka Enberg
parent 278b1bb131
commit 8a13a4cc80
5 changed files with 68 additions and 81 deletions
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73
mm/slab.c
View File

@ -1677,20 +1677,20 @@ void __init kmem_cache_init(void)
*/
sizes[INDEX_AC].cs_cachep = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT);
__kmem_cache_create(sizes[INDEX_AC].cs_cachep, names[INDEX_AC].name,
sizes[INDEX_AC].cs_size,
ARCH_KMALLOC_MINALIGN,
ARCH_KMALLOC_FLAGS|SLAB_PANIC,
NULL);
sizes[INDEX_AC].cs_cachep->name = names[INDEX_AC].name;
sizes[INDEX_AC].cs_cachep->size = sizes[INDEX_AC].cs_size;
sizes[INDEX_AC].cs_cachep->object_size = sizes[INDEX_AC].cs_size;
sizes[INDEX_AC].cs_cachep->align = ARCH_KMALLOC_MINALIGN;
__kmem_cache_create(sizes[INDEX_AC].cs_cachep, ARCH_KMALLOC_FLAGS|SLAB_PANIC);
list_add(&sizes[INDEX_AC].cs_cachep->list, &slab_caches);
if (INDEX_AC != INDEX_L3) {
sizes[INDEX_L3].cs_cachep = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT);
__kmem_cache_create(sizes[INDEX_L3].cs_cachep, names[INDEX_L3].name,
sizes[INDEX_L3].cs_size,
ARCH_KMALLOC_MINALIGN,
ARCH_KMALLOC_FLAGS|SLAB_PANIC,
NULL);
sizes[INDEX_L3].cs_cachep->name = names[INDEX_L3].name;
sizes[INDEX_L3].cs_cachep->size = sizes[INDEX_L3].cs_size;
sizes[INDEX_L3].cs_cachep->object_size = sizes[INDEX_L3].cs_size;
sizes[INDEX_L3].cs_cachep->align = ARCH_KMALLOC_MINALIGN;
__kmem_cache_create(sizes[INDEX_L3].cs_cachep, ARCH_KMALLOC_FLAGS|SLAB_PANIC);
list_add(&sizes[INDEX_L3].cs_cachep->list, &slab_caches);
}
@ -1706,22 +1706,21 @@ void __init kmem_cache_init(void)
*/
if (!sizes->cs_cachep) {
sizes->cs_cachep = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT);
__kmem_cache_create(sizes->cs_cachep, names->name,
sizes->cs_size,
ARCH_KMALLOC_MINALIGN,
ARCH_KMALLOC_FLAGS|SLAB_PANIC,
NULL);
sizes->cs_cachep->name = names->name;
sizes->cs_cachep->size = sizes->cs_size;
sizes->cs_cachep->object_size = sizes->cs_size;
sizes->cs_cachep->align = ARCH_KMALLOC_MINALIGN;
__kmem_cache_create(sizes->cs_cachep, ARCH_KMALLOC_FLAGS|SLAB_PANIC);
list_add(&sizes->cs_cachep->list, &slab_caches);
}
#ifdef CONFIG_ZONE_DMA
sizes->cs_dmacachep = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT);
sizes->cs_dmacachep->name = names->name_dma;
sizes->cs_dmacachep->size = sizes->cs_size;
sizes->cs_dmacachep->object_size = sizes->cs_size;
sizes->cs_dmacachep->align = ARCH_KMALLOC_MINALIGN;
__kmem_cache_create(sizes->cs_dmacachep,
names->name_dma,
sizes->cs_size,
ARCH_KMALLOC_MINALIGN,
ARCH_KMALLOC_FLAGS|SLAB_CACHE_DMA|
SLAB_PANIC,
NULL);
ARCH_KMALLOC_FLAGS|SLAB_CACHE_DMA| SLAB_PANIC);
list_add(&sizes->cs_dmacachep->list, &slab_caches);
#endif
sizes++;
@ -2360,12 +2359,12 @@ static int __init_refok setup_cpu_cache(struct kmem_cache *cachep, gfp_t gfp)
* as davem.
*/
int
__kmem_cache_create (struct kmem_cache *cachep, const char *name, size_t size, size_t align,
unsigned long flags, void (*ctor)(void *))
__kmem_cache_create (struct kmem_cache *cachep, unsigned long flags)
{
size_t left_over, slab_size, ralign;
gfp_t gfp;
int err;
size_t size = cachep->size;
#if DEBUG
#if FORCED_DEBUG
@ -2437,8 +2436,8 @@ __kmem_cache_create (struct kmem_cache *cachep, const char *name, size_t size, s
ralign = ARCH_SLAB_MINALIGN;
}
/* 3) caller mandated alignment */
if (ralign < align) {
ralign = align;
if (ralign < cachep->align) {
ralign = cachep->align;
}
/* disable debug if necessary */
if (ralign > __alignof__(unsigned long long))
@ -2446,7 +2445,7 @@ __kmem_cache_create (struct kmem_cache *cachep, const char *name, size_t size, s
/*
* 4) Store it.
*/
align = ralign;
cachep->align = ralign;
if (slab_is_available())
gfp = GFP_KERNEL;
@ -2454,8 +2453,6 @@ __kmem_cache_create (struct kmem_cache *cachep, const char *name, size_t size, s
gfp = GFP_NOWAIT;
cachep->nodelists = (struct kmem_list3 **)&cachep->array[nr_cpu_ids];
cachep->object_size = size;
cachep->align = align;
#if DEBUG
/*
@ -2500,17 +2497,15 @@ __kmem_cache_create (struct kmem_cache *cachep, const char *name, size_t size, s
*/
flags |= CFLGS_OFF_SLAB;
size = ALIGN(size, align);
size = ALIGN(size, cachep->align);
left_over = calculate_slab_order(cachep, size, align, flags);
left_over = calculate_slab_order(cachep, size, cachep->align, flags);
if (!cachep->num) {
printk(KERN_ERR
"kmem_cache_create: couldn't create cache %s.\n", name);
if (!cachep->num)
return -E2BIG;
}
slab_size = ALIGN(cachep->num * sizeof(kmem_bufctl_t)
+ sizeof(struct slab), align);
+ sizeof(struct slab), cachep->align);
/*
* If the slab has been placed off-slab, and we have enough space then
@ -2538,8 +2533,8 @@ __kmem_cache_create (struct kmem_cache *cachep, const char *name, size_t size, s
cachep->colour_off = cache_line_size();
/* Offset must be a multiple of the alignment. */
if (cachep->colour_off < align)
cachep->colour_off = align;
if (cachep->colour_off < cachep->align)
cachep->colour_off = cachep->align;
cachep->colour = left_over / cachep->colour_off;
cachep->slab_size = slab_size;
cachep->flags = flags;
@ -2560,8 +2555,6 @@ __kmem_cache_create (struct kmem_cache *cachep, const char *name, size_t size, s
*/
BUG_ON(ZERO_OR_NULL_PTR(cachep->slabp_cache));
}
cachep->ctor = ctor;
cachep->name = name;
cachep->refcount = 1;
err = setup_cpu_cache(cachep, gfp);

3
mm/slab.h
View File

@ -33,8 +33,7 @@ extern struct list_head slab_caches;
extern struct kmem_cache *kmem_cache;
/* Functions provided by the slab allocators */
extern int __kmem_cache_create(struct kmem_cache *, const char *name,
size_t size, size_t align, unsigned long flags, void (*ctor)(void *));
extern int __kmem_cache_create(struct kmem_cache *, unsigned long flags);
#ifdef CONFIG_SLUB
struct kmem_cache *__kmem_cache_alias(const char *name, size_t size,

26
mm/slab_common.c
View File

@ -100,7 +100,6 @@ struct kmem_cache *kmem_cache_create(const char *name, size_t size, size_t align
{
struct kmem_cache *s = NULL;
int err = 0;
char *n;
get_online_cpus();
mutex_lock(&slab_mutex);
@ -109,32 +108,33 @@ struct kmem_cache *kmem_cache_create(const char *name, size_t size, size_t align
goto out_locked;
n = kstrdup(name, GFP_KERNEL);
if (!n) {
err = -ENOMEM;
goto out_locked;
}
s = __kmem_cache_alias(name, size, align, flags, ctor);
if (s)
goto out_locked;
s = kmem_cache_zalloc(kmem_cache, GFP_KERNEL);
if (s) {
err = __kmem_cache_create(s, n, size, align, flags, ctor);
s->object_size = s->size = size;
s->align = align;
s->ctor = ctor;
s->name = kstrdup(name, GFP_KERNEL);
if (!s->name) {
kmem_cache_free(kmem_cache, s);
err = -ENOMEM;
goto out_locked;
}
err = __kmem_cache_create(s, flags);
if (!err)
list_add(&s->list, &slab_caches);
else {
kfree(n);
kfree(s->name);
kmem_cache_free(kmem_cache, s);
}
} else {
kfree(n);
} else
err = -ENOMEM;
}
out_locked:
mutex_unlock(&slab_mutex);

8
mm/slob.c
View File

@ -508,17 +508,15 @@ size_t ksize(const void *block)
}
EXPORT_SYMBOL(ksize);
int __kmem_cache_create(struct kmem_cache *c, const char *name, size_t size,
size_t align, unsigned long flags, void (*ctor)(void *))
int __kmem_cache_create(struct kmem_cache *c, unsigned long flags)
{
c->name = name;
c->size = size;
size_t align = c->size;
if (flags & SLAB_DESTROY_BY_RCU) {
/* leave room for rcu footer at the end of object */
c->size += sizeof(struct slob_rcu);
}
c->flags = flags;
c->ctor = ctor;
/* ignore alignment unless it's forced */
c->align = (flags & SLAB_HWCACHE_ALIGN) ? SLOB_ALIGN : 0;
if (c->align < ARCH_SLAB_MINALIGN)

39
mm/slub.c
View File

@ -3029,16 +3029,9 @@ static int calculate_sizes(struct kmem_cache *s, int forced_order)
}
static int kmem_cache_open(struct kmem_cache *s,
const char *name, size_t size,
size_t align, unsigned long flags,
void (*ctor)(void *))
static int kmem_cache_open(struct kmem_cache *s, unsigned long flags)
{
s->name = name;
s->ctor = ctor;
s->object_size = size;
s->align = align;
s->flags = kmem_cache_flags(size, flags, name, ctor);
s->flags = kmem_cache_flags(s->size, flags, s->name, s->ctor);
s->reserved = 0;
if (need_reserve_slab_rcu && (s->flags & SLAB_DESTROY_BY_RCU))
@ -3115,7 +3108,7 @@ error:
if (flags & SLAB_PANIC)
panic("Cannot create slab %s size=%lu realsize=%u "
"order=%u offset=%u flags=%lx\n",
s->name, (unsigned long)size, s->size, oo_order(s->oo),
s->name, (unsigned long)s->size, s->size, oo_order(s->oo),
s->offset, flags);
return -EINVAL;
}
@ -3261,12 +3254,15 @@ static struct kmem_cache *__init create_kmalloc_cache(const char *name,
s = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT);
s->name = name;
s->size = s->object_size = size;
s->align = ARCH_KMALLOC_MINALIGN;
/*
* This function is called with IRQs disabled during early-boot on
* single CPU so there's no need to take slab_mutex here.
*/
if (kmem_cache_open(s, name, size, ARCH_KMALLOC_MINALIGN,
flags, NULL))
if (kmem_cache_open(s, flags))
goto panic;
list_add(&s->list, &slab_caches);
@ -3719,9 +3715,10 @@ void __init kmem_cache_init(void)
*/
kmem_cache_node = (void *)kmem_cache + kmalloc_size;
kmem_cache_open(kmem_cache_node, "kmem_cache_node",
sizeof(struct kmem_cache_node),
0, SLAB_HWCACHE_ALIGN | SLAB_PANIC, NULL);
kmem_cache_node->name = "kmem_cache_node";
kmem_cache_node->size = kmem_cache_node->object_size =
sizeof(struct kmem_cache_node);
kmem_cache_open(kmem_cache_node, SLAB_HWCACHE_ALIGN | SLAB_PANIC);
hotplug_memory_notifier(slab_memory_callback, SLAB_CALLBACK_PRI);
@ -3729,8 +3726,10 @@ void __init kmem_cache_init(void)
slab_state = PARTIAL;
temp_kmem_cache = kmem_cache;
kmem_cache_open(kmem_cache, "kmem_cache", kmem_size,
0, SLAB_HWCACHE_ALIGN | SLAB_PANIC, NULL);
kmem_cache->name = "kmem_cache";
kmem_cache->size = kmem_cache->object_size = kmem_size;
kmem_cache_open(kmem_cache, SLAB_HWCACHE_ALIGN | SLAB_PANIC);
kmem_cache = kmem_cache_alloc(kmem_cache, GFP_NOWAIT);
memcpy(kmem_cache, temp_kmem_cache, kmem_size);
@ -3943,11 +3942,9 @@ struct kmem_cache *__kmem_cache_alias(const char *name, size_t size,
return s;
}
int __kmem_cache_create(struct kmem_cache *s,
const char *name, size_t size,
size_t align, unsigned long flags, void (*ctor)(void *))
int __kmem_cache_create(struct kmem_cache *s, unsigned long flags)
{
return kmem_cache_open(s, name, size, align, flags, ctor);
return kmem_cache_open(s, flags);
}
#ifdef CONFIG_SMP