Commit 39d24e64 authored May 15, 2006 by Mike Kravetz Committed by Linus Torvalds May 15, 2006

[PATCH] add slab_is_available() routine for boot code



slab_is_available() indicates slab based allocators are available for use.
SPARSEMEM code needs to know this as it can be called at various times
during the boot process.

Signed-off-by: Mike Kravetz <kravetz@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent 48564e62

include/linux/slab.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -150,6 +150,7 @@ static inline void *kcalloc(size_t n, size_t size, gfp_t flags)

		extern void kfree(const void *);
		extern unsigned int ksize(const void *);
		extern int slab_is_available(void);

		#ifdef CONFIG_NUMA
		extern void kmem_cache_alloc_node(kmem_cache_t , gfp_t flags, int node);

mm/slab.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -700,6 +700,14 @@ static enum {
		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 == FULL;
		}

		static DEFINE_PER_CPU(struct work_struct, reap_work);

		static void free_block(struct kmem_cache cachep, void *objpp, int len,

mm/sparse.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -32,7 +32,7 @@ static struct mem_section *sparse_index_alloc(int nid)
		unsigned long array_size = SECTIONS_PER_ROOT *
		sizeof(struct mem_section);

		if (system_state == SYSTEM_RUNNING)
		if (slab_is_available())
		section = kmalloc_node(array_size, GFP_KERNEL, nid);
		else
		section = alloc_bootmem_node(NODE_DATA(nid), array_size);