The patch titled
add slab_is_available() routine for boot code
has been added to the -mm tree. Its filename is
add-slab_is_available-routine-for-boot-code.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
From: Mike Kravetz <kravetz@xxxxxxxxxx>
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@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
include/linux/slab.h | 1 +
mm/slab.c | 8 ++++++++
mm/sparse.c | 2 +-
3 files changed, 10 insertions(+), 1 deletion(-)
diff -puN include/linux/slab.h~add-slab_is_available-routine-for-boot-code include/linux/slab.h
--- devel/include/linux/slab.h~add-slab_is_available-routine-for-boot-code 2006-05-10 15:49:23.000000000 -0700
+++ devel-akpm/include/linux/slab.h 2006-05-10 15:49:23.000000000 -0700
@@ -150,6 +150,7 @@ static inline void *kcalloc(size_t n, si
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);
diff -puN mm/slab.c~add-slab_is_available-routine-for-boot-code mm/slab.c
--- devel/mm/slab.c~add-slab_is_available-routine-for-boot-code 2006-05-10 15:49:23.000000000 -0700
+++ devel-akpm/mm/slab.c 2006-05-10 15:49:23.000000000 -0700
@@ -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,
diff -puN mm/sparse.c~add-slab_is_available-routine-for-boot-code mm/sparse.c
--- devel/mm/sparse.c~add-slab_is_available-routine-for-boot-code 2006-05-10 15:49:23.000000000 -0700
+++ devel-akpm/mm/sparse.c 2006-05-10 15:49:23.000000000 -0700
@@ -32,7 +32,7 @@ static struct mem_section *sparse_index_
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);
_
Patches currently in -mm which might be from kravetz@xxxxxxxxxx are
origin.patch
add-slab_is_available-routine-for-boot-code.patch
-
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