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mm, sl[au]b: create common functions for boot slab creation

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Use a special function to create kmalloc caches and use that function in
SLAB and SLUB.

Acked-by: Joonsoo Kim <js1304@gmail.com>
Reviewed-by: Glauber Costa <glommer@parallels.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Christoph Lameter
2012-11-28 16:23:07 +00:00
committed by Pekka Enberg
parent 3c58346525
commit 45530c4474
4 changed files with 59 additions and 65 deletions
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37
mm/slub.c
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@@ -3245,32 +3245,6 @@ static int __init setup_slub_nomerge(char *str)
__setup("slub_nomerge", setup_slub_nomerge);
static struct kmem_cache *__init create_kmalloc_cache(const char *name,
int size, unsigned int flags)
{
struct kmem_cache *s;
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, flags))
goto panic;
list_add(&s->list, &slab_caches);
return s;
panic:
panic("Creation of kmalloc slab %s size=%d failed.\n", name, size);
return NULL;
}
/*
* Conversion table for small slabs sizes / 8 to the index in the
* kmalloc array. This is necessary for slabs < 192 since we have non power
@@ -3948,6 +3922,10 @@ int __kmem_cache_create(struct kmem_cache *s, unsigned long flags)
if (err)
return err;
/* Mutex is not taken during early boot */
if (slab_state <= UP)
return 0;
mutex_unlock(&slab_mutex);
err = sysfs_slab_add(s);
mutex_lock(&slab_mutex);
@@ -5249,13 +5227,8 @@ static int sysfs_slab_add(struct kmem_cache *s)
{
int err;
const char *name;
int unmergeable;
int unmergeable = slab_unmergeable(s);
if (slab_state < FULL)
/* Defer until later */
return 0;
unmergeable = slab_unmergeable(s);
if (unmergeable) {
/*
* Slabcache can never be merged so we can use the name proper.