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authorChristoph Lameter <cl@linux.com>2012-11-28 16:23:07 +0000
committerPekka Enberg <penberg@kernel.org>2012-12-11 12:14:27 +0200
commit45530c4474d258b822e2639c786606d8257aad8b (patch)
tree87b6569f777987037c490b9660826a02e17e228d /mm/slab_common.c
parent3c58346525d82625e68e24f071804c2dc057b6f4 (diff)
mm, sl[au]b: create common functions for boot slab creation
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>
Diffstat (limited to 'mm/slab_common.c')
-rw-r--r--mm/slab_common.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/mm/slab_common.c b/mm/slab_common.c
index b705be7faa48..497b45c25bae 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -202,6 +202,42 @@ int slab_is_available(void)
return slab_state >= UP;
}
+#ifndef CONFIG_SLOB
+/* Create a cache during boot when no slab services are available yet */
+void __init create_boot_cache(struct kmem_cache *s, const char *name, size_t size,
+ unsigned long flags)
+{
+ int err;
+
+ s->name = name;
+ s->size = s->object_size = size;
+ s->align = ARCH_KMALLOC_MINALIGN;
+ err = __kmem_cache_create(s, flags);
+
+ if (err)
+ panic("Creation of kmalloc slab %s size=%zd failed. Reason %d\n",
+ name, size, err);
+
+ s->refcount = -1; /* Exempt from merging for now */
+}
+
+struct kmem_cache *__init create_kmalloc_cache(const char *name, size_t size,
+ unsigned long flags)
+{
+ struct kmem_cache *s = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT);
+
+ if (!s)
+ panic("Out of memory when creating slab %s\n", name);
+
+ create_boot_cache(s, name, size, flags);
+ list_add(&s->list, &slab_caches);
+ s->refcount = 1;
+ return s;
+}
+
+#endif /* !CONFIG_SLOB */
+
+
#ifdef CONFIG_SLABINFO
static void print_slabinfo_header(struct seq_file *m)
{