From 97d06609158e61f6bdf538c4a6788e2de492236f Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Fri, 6 Jul 2012 15:25:11 -0500 Subject: 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 Reviewed-by: Joonsoo Kim Signed-off-by: Christoph Lameter Signed-off-by: Pekka Enberg --- mm/slab.h | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 mm/slab.h (limited to 'mm/slab.h') diff --git a/mm/slab.h b/mm/slab.h new file mode 100644 index 000000000000..f9a9815cdc82 --- /dev/null +++ b/mm/slab.h @@ -0,0 +1,29 @@ +#ifndef MM_SLAB_H +#define MM_SLAB_H +/* + * Internal slab definitions + */ + +/* + * State of the slab allocator. + * + * This is used to describe the states of the allocator during bootup. + * Allocators use this to gradually bootstrap themselves. Most allocators + * have the problem that the structures used for managing slab caches are + * allocated from slab caches themselves. + */ +enum slab_state { + DOWN, /* No slab functionality yet */ + PARTIAL, /* SLUB: kmem_cache_node available */ + PARTIAL_ARRAYCACHE, /* SLAB: kmalloc size for arraycache available */ + PARTIAL_L3, /* SLAB: kmalloc size for l3 struct available */ + UP, /* Slab caches usable but not all extras yet */ + FULL /* Everything is working */ +}; + +extern enum slab_state slab_state; + +struct kmem_cache *__kmem_cache_create(const char *name, size_t size, + size_t align, unsigned long flags, void (*ctor)(void *)); + +#endif -- cgit v1.2.3-55-g7522