From: Christoph Lameter <cl@linux.com>
To: Pekka Enberg <penberg@kernel.org>
Cc: Joonsoo Kim <js1304@gmail.com>,
Glauber Costa <glommer@parallels.com>,
linux-mm@kvack.org, David Rientjes <rientjes@google.com>
Subject: CK1 [02/13] create common functions for boot slab creation
Date: Wed, 26 Sep 2012 20:01:37 +0000 [thread overview]
Message-ID: <0000013a042b9869-e49d65b2-0216-4010-8c8c-b12654aa219e-000000@email.amazonses.com> (raw)
In-Reply-To: <20120926200005.911809821@linux.com>
Use a special function to create kmalloc caches and use that function in
SLAB and SLUB.
Signed-off-by: Christoph Lameter <cl@linux.com>
---
mm/slab.c | 48 ++++++++++++++----------------------------------
mm/slab.h | 5 +++++
mm/slab_common.c | 32 ++++++++++++++++++++++++++++++++
mm/slub.c | 36 +++---------------------------------
4 files changed, 54 insertions(+), 67 deletions(-)
Index: linux/mm/slab.c
===================================================================
--- linux.orig/mm/slab.c 2012-09-19 09:21:13.022941932 -0500
+++ linux/mm/slab.c 2012-09-19 09:21:14.422971030 -0500
@@ -1686,23 +1686,13 @@ void __init kmem_cache_init(void)
* bug.
*/
- sizes[INDEX_AC].cs_cachep = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT);
- sizes[INDEX_AC].cs_cachep->name = names[INDEX_AC].name;
- sizes[INDEX_AC].cs_cachep->size = sizes[INDEX_AC].cs_size;
- sizes[INDEX_AC].cs_cachep->object_size = sizes[INDEX_AC].cs_size;
- sizes[INDEX_AC].cs_cachep->align = ARCH_KMALLOC_MINALIGN;
- __kmem_cache_create(sizes[INDEX_AC].cs_cachep, ARCH_KMALLOC_FLAGS|SLAB_PANIC);
- list_add(&sizes[INDEX_AC].cs_cachep->list, &slab_caches);
+ sizes[INDEX_AC].cs_cachep = create_kmalloc_cache(names[INDEX_AC].name,
+ sizes[INDEX_AC].cs_size, ARCH_KMALLOC_FLAGS);
- if (INDEX_AC != INDEX_L3) {
- sizes[INDEX_L3].cs_cachep = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT);
- sizes[INDEX_L3].cs_cachep->name = names[INDEX_L3].name;
- sizes[INDEX_L3].cs_cachep->size = sizes[INDEX_L3].cs_size;
- sizes[INDEX_L3].cs_cachep->object_size = sizes[INDEX_L3].cs_size;
- sizes[INDEX_L3].cs_cachep->align = ARCH_KMALLOC_MINALIGN;
- __kmem_cache_create(sizes[INDEX_L3].cs_cachep, ARCH_KMALLOC_FLAGS|SLAB_PANIC);
- list_add(&sizes[INDEX_L3].cs_cachep->list, &slab_caches);
- }
+ if (INDEX_AC != INDEX_L3)
+ sizes[INDEX_L3].cs_cachep =
+ create_kmalloc_cache(names[INDEX_L3].name,
+ sizes[INDEX_L3].cs_size, ARCH_KMALLOC_FLAGS);
slab_early_init = 0;
@@ -1714,24 +1704,14 @@ void __init kmem_cache_init(void)
* Note for systems short on memory removing the alignment will
* allow tighter packing of the smaller caches.
*/
- if (!sizes->cs_cachep) {
- sizes->cs_cachep = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT);
- sizes->cs_cachep->name = names->name;
- sizes->cs_cachep->size = sizes->cs_size;
- sizes->cs_cachep->object_size = sizes->cs_size;
- sizes->cs_cachep->align = ARCH_KMALLOC_MINALIGN;
- __kmem_cache_create(sizes->cs_cachep, ARCH_KMALLOC_FLAGS|SLAB_PANIC);
- list_add(&sizes->cs_cachep->list, &slab_caches);
- }
+ if (!sizes->cs_cachep)
+ sizes->cs_cachep = create_kmalloc_cache(names->name,
+ sizes->cs_size, ARCH_KMALLOC_FLAGS);
+
#ifdef CONFIG_ZONE_DMA
- sizes->cs_dmacachep = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT);
- sizes->cs_dmacachep->name = names->name_dma;
- sizes->cs_dmacachep->size = sizes->cs_size;
- sizes->cs_dmacachep->object_size = sizes->cs_size;
- sizes->cs_dmacachep->align = ARCH_KMALLOC_MINALIGN;
- __kmem_cache_create(sizes->cs_dmacachep,
- ARCH_KMALLOC_FLAGS|SLAB_CACHE_DMA| SLAB_PANIC);
- list_add(&sizes->cs_dmacachep->list, &slab_caches);
+ sizes->cs_dmacachep = create_kmalloc_cache(
+ names->name_dma, sizes->cs_size,
+ SLAB_CACHE_DMA|ARCH_KMALLOC_FLAGS);
#endif
sizes++;
names++;
Index: linux/mm/slab.h
===================================================================
--- linux.orig/mm/slab.h 2012-09-19 09:21:13.014941777 -0500
+++ linux/mm/slab.h 2012-09-19 09:21:14.422971030 -0500
@@ -35,6 +35,11 @@ extern struct kmem_cache *kmem_cache;
/* Functions provided by the slab allocators */
extern int __kmem_cache_create(struct kmem_cache *, unsigned long flags);
+extern struct kmem_cache *create_kmalloc_cache(const char *name, size_t size,
+ unsigned long flags);
+extern void create_boot_cache(struct kmem_cache *, const char *name,
+ size_t size, unsigned long flags);
+
#ifdef CONFIG_SLUB
struct kmem_cache *__kmem_cache_alias(const char *name, size_t size,
size_t align, unsigned long flags, void (*ctor)(void *));
Index: linux/mm/slab_common.c
===================================================================
--- linux.orig/mm/slab_common.c 2012-09-19 09:21:13.034942193 -0500
+++ linux/mm/slab_common.c 2012-09-19 09:21:14.422971030 -0500
@@ -189,3 +189,35 @@ int slab_is_available(void)
{
return slab_state >= UP;
}
+
+/* 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=%ld failed. Reason %d\n",
+ name, size, err);
+
+ list_add(&s->list, &slab_caches);
+ 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);
+ s->refcount = 1;
+ return s;
+}
Index: linux/mm/slub.c
===================================================================
--- linux.orig/mm/slub.c 2012-09-19 09:21:13.046942444 -0500
+++ linux/mm/slub.c 2012-09-19 09:21:14.422971030 -0500
@@ -3253,32 +3253,6 @@ static int __init setup_slub_nomerge(cha
__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
--
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next parent reply other threads:[~2012-09-26 20:01 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20120926200005.911809821@linux.com>
2012-09-26 20:01 ` Christoph Lameter [this message]
2012-09-27 13:22 ` Glauber Costa
2012-09-26 20:01 ` CK1 [01/13] slab: Simplify bootstrap Christoph Lameter
2012-09-26 20:07 ` CK1 [09/13] slab: rename nodelists to node Christoph Lameter
2012-09-28 8:42 ` Glauber Costa
2012-09-28 14:45 ` Christoph Lameter
2012-09-26 20:07 ` CK1 [08/13] slab: Common name for the per node structures Christoph Lameter
2012-09-28 8:38 ` Glauber Costa
2012-09-28 14:21 ` Christoph Lameter
2012-09-26 20:18 ` CK1 [10/13] Do not define KMALLOC array definitions for SLOB Christoph Lameter
2012-09-28 8:44 ` Glauber Costa
2012-09-28 17:11 ` Christoph Lameter
2012-09-26 20:18 ` CK1 [07/13] slab: Use common kmalloc_index/kmalloc_size functions Christoph Lameter
2012-09-28 8:36 ` Glauber Costa
2012-09-28 14:20 ` Christoph Lameter
2012-09-26 20:18 ` CK1 [04/13] slab: Use the new create_boot_cache function to simplify bootstrap Christoph Lameter
2012-09-27 13:24 ` Glauber Costa
2012-09-27 14:32 ` Christoph Lameter
2012-09-27 14:33 ` Glauber Costa
2012-09-26 20:20 ` CK1 [03/13] slub: Use a statically allocated kmem_cache boot structure for bootstrap Christoph Lameter
2012-09-27 13:25 ` Glauber Costa
2012-09-26 20:20 ` CK1 [11/13] Common constants for kmalloc boundaries Christoph Lameter
2012-09-26 20:20 ` CK1 [06/13] Common kmalloc slab index determination Christoph Lameter
2012-09-28 8:27 ` Glauber Costa
2012-09-28 14:16 ` Christoph Lameter
2012-09-26 20:20 ` CK1 [05/13] Common alignment code Christoph Lameter
2012-09-26 20:20 ` CK1 [12/13] Common names for the array of kmalloc caches Christoph Lameter
2012-09-26 20:29 ` CK1 [13/13] Common function to create the kmalloc array Christoph Lameter
2012-09-28 8:51 ` Glauber Costa
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