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mm/sl[aou]b: Move kmallocXXX functions to common code

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The kmalloc* functions of all slab allcoators are similar now so
lets move them into slab.h. This requires some function naming changes
in slob.

As a results of this patch there is a common set of functions for
all allocators. Also means that kmalloc_large() is now available
in general to perform large order allocations that go directly
via the page allocator. kmalloc_large() can be substituted if
kmalloc() throws warnings because of too large allocations.

kmalloc_large() has exactly the same semantics as kmalloc but
can only used for allocations > PAGE_SIZE.

Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Christoph Lameter 2013-09-04 16:35:34 +00:00 committed by Pekka Enberg
parent 9de1bc8752
commit f1b6eb6e6b
7 changed files with 158 additions and 278 deletions
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156
include/linux/slab.h
View File

@ -4,6 +4,8 @@
* (C) SGI 2006, Christoph Lameter
* Cleaned up and restructured to ease the addition of alternative
* implementations of SLAB allocators.
* (C) Linux Foundation 2008-2013
* Unified interface for all slab allocators
*/
#ifndef _LINUX_SLAB_H
@ -94,6 +96,7 @@
#define ZERO_OR_NULL_PTR(x) ((unsigned long)(x) <= \
(unsigned long)ZERO_SIZE_PTR)
#include <linux/kmemleak.h>
struct mem_cgroup;
/*
@ -289,6 +292,57 @@ static __always_inline int kmalloc_index(size_t size)
}
#endif /* !CONFIG_SLOB */
void *__kmalloc(size_t size, gfp_t flags);
void *kmem_cache_alloc(struct kmem_cache *, gfp_t flags);
#ifdef CONFIG_NUMA
void *__kmalloc_node(size_t size, gfp_t flags, int node);
void *kmem_cache_alloc_node(struct kmem_cache *, gfp_t flags, int node);
#else
static __always_inline void *__kmalloc_node(size_t size, gfp_t flags, int node)
{
return __kmalloc(size, flags);
}
static __always_inline void *kmem_cache_alloc_node(struct kmem_cache *s, gfp_t flags, int node)
{
return kmem_cache_alloc(s, flags);
}
#endif
#ifdef CONFIG_TRACING
extern void *kmem_cache_alloc_trace(struct kmem_cache *, gfp_t, size_t);
#ifdef CONFIG_NUMA
extern void *kmem_cache_alloc_node_trace(struct kmem_cache *s,
gfp_t gfpflags,
int node, size_t size);
#else
static __always_inline void *
kmem_cache_alloc_node_trace(struct kmem_cache *s,
gfp_t gfpflags,
int node, size_t size)
{
return kmem_cache_alloc_trace(s, gfpflags, size);
}
#endif /* CONFIG_NUMA */
#else /* CONFIG_TRACING */
static __always_inline void *kmem_cache_alloc_trace(struct kmem_cache *s,
gfp_t flags, size_t size)
{
return kmem_cache_alloc(s, flags);
}
static __always_inline void *
kmem_cache_alloc_node_trace(struct kmem_cache *s,
gfp_t gfpflags,
int node, size_t size)
{
return kmem_cache_alloc_node(s, gfpflags, node);
}
#endif /* CONFIG_TRACING */
#ifdef CONFIG_SLAB
#include <linux/slab_def.h>
#endif
@ -297,10 +351,61 @@ static __always_inline int kmalloc_index(size_t size)
#include <linux/slub_def.h>
#endif
#ifdef CONFIG_SLOB
#include <linux/slob_def.h>
static __always_inline void *
kmalloc_order(size_t size, gfp_t flags, unsigned int order)
{
void *ret;
flags |= (__GFP_COMP | __GFP_KMEMCG);
ret = (void *) __get_free_pages(flags, order);
kmemleak_alloc(ret, size, 1, flags);
return ret;
}
#ifdef CONFIG_TRACING
extern void *kmalloc_order_trace(size_t size, gfp_t flags, unsigned int order);
#else
static __always_inline void *
kmalloc_order_trace(size_t size, gfp_t flags, unsigned int order)
{
return kmalloc_order(size, flags, order);
}
#endif
static __always_inline void *kmalloc_large(size_t size, gfp_t flags)
{
unsigned int order = get_order(size);
return kmalloc_order_trace(size, flags, order);
}
/**
* kmalloc - allocate memory
* @size: how many bytes of memory are required.
* @flags: the type of memory to allocate (see kcalloc).
*
* kmalloc is the normal method of allocating memory
* for objects smaller than page size in the kernel.
*/
static __always_inline void *kmalloc(size_t size, gfp_t flags)
{
if (__builtin_constant_p(size)) {
if (size > KMALLOC_MAX_CACHE_SIZE)
return kmalloc_large(size, flags);
#ifndef CONFIG_SLOB
if (!(flags & GFP_DMA)) {
int index = kmalloc_index(size);
if (!index)
return ZERO_SIZE_PTR;
return kmem_cache_alloc_trace(kmalloc_caches[index],
flags, size);
}
#endif
}
return __kmalloc(size, flags);
}
/*
* Determine size used for the nth kmalloc cache.
* return size or 0 if a kmalloc cache for that
@ -321,6 +426,23 @@ static __always_inline int kmalloc_size(int n)
return 0;
}
static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
{
#ifndef CONFIG_SLOB
if (__builtin_constant_p(size) &&
size <= KMALLOC_MAX_CACHE_SIZE && !(flags & SLAB_CACHE_DMA)) {
int i = kmalloc_index(size);
if (!i)
return ZERO_SIZE_PTR;
return kmem_cache_alloc_node_trace(kmalloc_caches[i],
flags, node, size);
}
#endif
return __kmalloc_node(size, flags, node);
}
/*
* Setting ARCH_SLAB_MINALIGN in arch headers allows a different alignment.
* Intended for arches that get misalignment faults even for 64 bit integer
@ -451,36 +573,6 @@ static inline void *kcalloc(size_t n, size_t size, gfp_t flags)
return kmalloc_array(n, size, flags | __GFP_ZERO);
}
#if !defined(CONFIG_NUMA) && !defined(CONFIG_SLOB)
/**
* kmalloc_node - allocate memory from a specific node
* @size: how many bytes of memory are required.
* @flags: the type of memory to allocate (see kmalloc).
* @node: node to allocate from.
*
* kmalloc() for non-local nodes, used to allocate from a specific node
* if available. Equivalent to kmalloc() in the non-NUMA single-node
* case.
*/
static inline void *kmalloc_node(size_t size, gfp_t flags, int node)
{
return kmalloc(size, flags);
}
static inline void *__kmalloc_node(size_t size, gfp_t flags, int node)
{
return __kmalloc(size, flags);
}
void *kmem_cache_alloc(struct kmem_cache *, gfp_t);
static inline void *kmem_cache_alloc_node(struct kmem_cache *cachep,
gfp_t flags, int node)
{
return kmem_cache_alloc(cachep, flags);
}
#endif /* !CONFIG_NUMA && !CONFIG_SLOB */
/*
* kmalloc_track_caller is a special version of kmalloc that records the
* calling function of the routine calling it for slab leak tracking instead

106
include/linux/slab_def.h
View File

@ -3,20 +3,6 @@
/*
* Definitions unique to the original Linux SLAB allocator.
*
* What we provide here is a way to optimize the frequent kmalloc
* calls in the kernel by selecting the appropriate general cache
* if kmalloc was called with a size that can be established at
* compile time.
*/
#include <linux/init.h>
#include <linux/compiler.h>
/*
* struct kmem_cache
*
* manages a cache.
*/
struct kmem_cache {
@ -102,96 +88,4 @@ struct kmem_cache {
*/
};
void *kmem_cache_alloc(struct kmem_cache *, gfp_t);
void *__kmalloc(size_t size, gfp_t flags);
#ifdef CONFIG_TRACING
extern void *kmem_cache_alloc_trace(struct kmem_cache *, gfp_t, size_t);
#else
static __always_inline void *
kmem_cache_alloc_trace(struct kmem_cache *cachep, gfp_t flags, size_t size)
{
return kmem_cache_alloc(cachep, flags);
}
#endif
static __always_inline void *kmalloc(size_t size, gfp_t flags)
{
struct kmem_cache *cachep;
void *ret;
if (__builtin_constant_p(size)) {
int i;
if (!size)
return ZERO_SIZE_PTR;
if (WARN_ON_ONCE(size > KMALLOC_MAX_SIZE))
return NULL;
i = kmalloc_index(size);
#ifdef CONFIG_ZONE_DMA
if (flags & GFP_DMA)
cachep = kmalloc_dma_caches[i];
else
#endif
cachep = kmalloc_caches[i];
ret = kmem_cache_alloc_trace(cachep, flags, size);
return ret;
}
return __kmalloc(size, flags);
}
#ifdef CONFIG_NUMA
extern void *__kmalloc_node(size_t size, gfp_t flags, int node);
extern void *kmem_cache_alloc_node(struct kmem_cache *, gfp_t flags, int node);
#ifdef CONFIG_TRACING
extern void *kmem_cache_alloc_node_trace(struct kmem_cache *cachep,
gfp_t flags,
int nodeid,
size_t size);
#else
static __always_inline void *
kmem_cache_alloc_node_trace(struct kmem_cache *cachep,
gfp_t flags,
int nodeid,
size_t size)
{
return kmem_cache_alloc_node(cachep, flags, nodeid);
}
#endif
static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
{
struct kmem_cache *cachep;
if (__builtin_constant_p(size)) {
int i;
if (!size)
return ZERO_SIZE_PTR;
if (WARN_ON_ONCE(size > KMALLOC_MAX_SIZE))
return NULL;
i = kmalloc_index(size);
#ifdef CONFIG_ZONE_DMA
if (flags & GFP_DMA)
cachep = kmalloc_dma_caches[i];
else
#endif
cachep = kmalloc_caches[i];
return kmem_cache_alloc_node_trace(cachep, flags, node, size);
}
return __kmalloc_node(size, flags, node);
}
#endif /* CONFIG_NUMA */
#endif /* _LINUX_SLAB_DEF_H */

31
include/linux/slob_def.h
View File

@ -1,31 +0,0 @@
#ifndef __LINUX_SLOB_DEF_H
#define __LINUX_SLOB_DEF_H
#include <linux/numa.h>
void *kmem_cache_alloc_node(struct kmem_cache *, gfp_t flags, int node);
static __always_inline void *kmem_cache_alloc(struct kmem_cache *cachep,
gfp_t flags)
{
return kmem_cache_alloc_node(cachep, flags, NUMA_NO_NODE);
}
void *__kmalloc_node(size_t size, gfp_t flags, int node);
static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
{
return __kmalloc_node(size, flags, node);
}
static __always_inline void *kmalloc(size_t size, gfp_t flags)
{
return __kmalloc_node(size, flags, NUMA_NO_NODE);
}
static __always_inline void *__kmalloc(size_t size, gfp_t flags)
{
return kmalloc(size, flags);
}
#endif /* __LINUX_SLOB_DEF_H */

97
include/linux/slub_def.h
View File

@ -6,14 +6,8 @@
*
* (C) 2007 SGI, Christoph Lameter
*/
#include <linux/types.h>
#include <linux/gfp.h>
#include <linux/bug.h>
#include <linux/workqueue.h>
#include <linux/kobject.h>
#include <linux/kmemleak.h>
enum stat_item {
ALLOC_FASTPATH, /* Allocation from cpu slab */
ALLOC_SLOWPATH, /* Allocation by getting a new cpu slab */
@ -104,20 +98,6 @@ struct kmem_cache {
struct kmem_cache_node *node[MAX_NUMNODES];
};
void *kmem_cache_alloc(struct kmem_cache *, gfp_t);
void *__kmalloc(size_t size, gfp_t flags);
static __always_inline void *
kmalloc_order(size_t size, gfp_t flags, unsigned int order)
{
void *ret;
flags |= (__GFP_COMP | __GFP_KMEMCG);
ret = (void *) __get_free_pages(flags, order);
kmemleak_alloc(ret, size, 1, flags);
return ret;
}
/**
* Calling this on allocated memory will check that the memory
* is expected to be in use, and print warnings if not.
@ -131,81 +111,4 @@ static inline bool verify_mem_not_deleted(const void *x)
}
#endif
#ifdef CONFIG_TRACING
extern void *
kmem_cache_alloc_trace(struct kmem_cache *s, gfp_t gfpflags, size_t size);
extern void *kmalloc_order_trace(size_t size, gfp_t flags, unsigned int order);
#else
static __always_inline void *
kmem_cache_alloc_trace(struct kmem_cache *s, gfp_t gfpflags, size_t size)
{
return kmem_cache_alloc(s, gfpflags);
}
static __always_inline void *
kmalloc_order_trace(size_t size, gfp_t flags, unsigned int order)
{
return kmalloc_order(size, flags, order);
}
#endif
static __always_inline void *kmalloc_large(size_t size, gfp_t flags)
{
unsigned int order = get_order(size);
return kmalloc_order_trace(size, flags, order);
}
static __always_inline void *kmalloc(size_t size, gfp_t flags)
{
if (__builtin_constant_p(size)) {
if (size > KMALLOC_MAX_CACHE_SIZE)
return kmalloc_large(size, flags);
if (!(flags & GFP_DMA)) {
int index = kmalloc_index(size);
if (!index)
return ZERO_SIZE_PTR;
return kmem_cache_alloc_trace(kmalloc_caches[index],
flags, size);
}
}
return __kmalloc(size, flags);
}
#ifdef CONFIG_NUMA
void *__kmalloc_node(size_t size, gfp_t flags, int node);
void *kmem_cache_alloc_node(struct kmem_cache *, gfp_t flags, int node);
#ifdef CONFIG_TRACING
extern void *kmem_cache_alloc_node_trace(struct kmem_cache *s,
gfp_t gfpflags,
int node, size_t size);
#else
static __always_inline void *
kmem_cache_alloc_node_trace(struct kmem_cache *s,
gfp_t gfpflags,
int node, size_t size)
{
return kmem_cache_alloc_node(s, gfpflags, node);
}
#endif
static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
{
if (__builtin_constant_p(size) &&
size <= KMALLOC_MAX_CACHE_SIZE && !(flags & GFP_DMA)) {
int index = kmalloc_index(size);
if (!index)
return ZERO_SIZE_PTR;
return kmem_cache_alloc_node_trace(kmalloc_caches[index],
flags, node, size);
}
return __kmalloc_node(size, flags, node);
}
#endif
#endif /* _LINUX_SLUB_DEF_H */

10
mm/slab_common.c
View File

@ -19,6 +19,7 @@
#include <asm/tlbflush.h>
#include <asm/page.h>
#include <linux/memcontrol.h>
#include <trace/events/kmem.h>
#include "slab.h"
@ -495,6 +496,15 @@ void __init create_kmalloc_caches(unsigned long flags)
}
#endif /* !CONFIG_SLOB */
#ifdef CONFIG_TRACING
void *kmalloc_order_trace(size_t size, gfp_t flags, unsigned int order)
{
void *ret = kmalloc_order(size, flags, order);
trace_kmalloc(_RET_IP_, ret, size, PAGE_SIZE << order, flags);
return ret;
}
EXPORT_SYMBOL(kmalloc_order_trace);
#endif
#ifdef CONFIG_SLABINFO

28
mm/slob.c
View File

@ -462,11 +462,11 @@ __do_kmalloc_node(size_t size, gfp_t gfp, int node, unsigned long caller)
return ret;
}
void *__kmalloc_node(size_t size, gfp_t gfp, int node)
void *__kmalloc(size_t size, gfp_t gfp)
{
return __do_kmalloc_node(size, gfp, node, _RET_IP_);
return __do_kmalloc_node(size, gfp, NUMA_NO_NODE, _RET_IP_);
}
EXPORT_SYMBOL(__kmalloc_node);
EXPORT_SYMBOL(__kmalloc);
#ifdef CONFIG_TRACING
void *__kmalloc_track_caller(size_t size, gfp_t gfp, unsigned long caller)
@ -534,7 +534,7 @@ int __kmem_cache_create(struct kmem_cache *c, unsigned long flags)
return 0;
}
void *kmem_cache_alloc_node(struct kmem_cache *c, gfp_t flags, int node)
void *slob_alloc_node(struct kmem_cache *c, gfp_t flags, int node)
{
void *b;
@ -560,7 +560,27 @@ void *kmem_cache_alloc_node(struct kmem_cache *c, gfp_t flags, int node)
kmemleak_alloc_recursive(b, c->size, 1, c->flags, flags);
return b;
}
EXPORT_SYMBOL(slob_alloc_node);
void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags)
{
return slob_alloc_node(cachep, flags, NUMA_NO_NODE);
}
EXPORT_SYMBOL(kmem_cache_alloc);
#ifdef CONFIG_NUMA
void *__kmalloc_node(size_t size, gfp_t gfp, int node)
{
return __do_kmalloc_node(size, gfp, node, _RET_IP_);
}
EXPORT_SYMBOL(__kmalloc_node);
void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t gfp, int node)
{
return slob_alloc_node(cachep, gfp, node);
}
EXPORT_SYMBOL(kmem_cache_alloc_node);
#endif
static void __kmem_cache_free(void *b, int size)
{

8
mm/slub.c
View File

@ -2450,14 +2450,6 @@ void *kmem_cache_alloc_trace(struct kmem_cache *s, gfp_t gfpflags, size_t size)
return ret;
}
EXPORT_SYMBOL(kmem_cache_alloc_trace);
void *kmalloc_order_trace(size_t size, gfp_t flags, unsigned int order)
{
void *ret = kmalloc_order(size, flags, order);
trace_kmalloc(_RET_IP_, ret, size, PAGE_SIZE << order, flags);
return ret;
}
EXPORT_SYMBOL(kmalloc_order_trace);
#endif
#ifdef CONFIG_NUMA