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linux-sg2042
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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6 

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6:
  slub: Fix a crash during slabinfo -v
  tracing/slab: Move kmalloc tracepoint out of inline code
  slub: Fix slub_lock down/up imbalance
  slub: Fix build breakage in Documentation/vm
  slub tracing: move trace calls out of always inlined functions to reduce kernel code size
  slub: move slabinfo.c to tools/slub/slabinfo.c
This commit is contained in:
Linus Torvalds 2011-01-10 08:38:01 -08:00
parent e3166331a3 a45b0616e7
commit a1e8fad590
6 changed files with 89 additions and 75 deletions
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2
Documentation/vm/Makefile
View File

@ -2,7 +2,7 @@
obj- := dummy.o
# List of programs to build
hostprogs-y := slabinfo page-types hugepage-mmap hugepage-shm map_hugetlb
hostprogs-y := page-types hugepage-mmap hugepage-shm map_hugetlb
# Tell kbuild to always build the programs
always := $(hostprogs-y)

33
include/linux/slab_def.h
View File

@ -138,11 +138,12 @@ 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_notrace(struct kmem_cache *cachep, gfp_t flags);
extern void *kmem_cache_alloc_trace(size_t size,
struct kmem_cache *cachep, gfp_t flags);
extern size_t slab_buffer_size(struct kmem_cache *cachep);
#else
static __always_inline void *
kmem_cache_alloc_notrace(struct kmem_cache *cachep, gfp_t flags)
kmem_cache_alloc_trace(size_t size, struct kmem_cache *cachep, gfp_t flags)
{
return kmem_cache_alloc(cachep, flags);
}
@ -179,10 +180,7 @@ found:
#endif
cachep = malloc_sizes[i].cs_cachep;
ret = kmem_cache_alloc_notrace(cachep, flags);
trace_kmalloc(_THIS_IP_, ret,
size, slab_buffer_size(cachep), flags);
ret = kmem_cache_alloc_trace(size, cachep, flags);
return ret;
}
@ -194,14 +192,16 @@ 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_notrace(struct kmem_cache *cachep,
gfp_t flags,
int nodeid);
extern void *kmem_cache_alloc_node_trace(size_t size,
struct kmem_cache *cachep,
gfp_t flags,
int nodeid);
#else
static __always_inline void *
kmem_cache_alloc_node_notrace(struct kmem_cache *cachep,
gfp_t flags,
int nodeid)
kmem_cache_alloc_node_trace(size_t size,
struct kmem_cache *cachep,
gfp_t flags,
int nodeid)
{
return kmem_cache_alloc_node(cachep, flags, nodeid);
}
@ -210,7 +210,6 @@ kmem_cache_alloc_node_notrace(struct kmem_cache *cachep,
static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
{
struct kmem_cache *cachep;
void *ret;
if (__builtin_constant_p(size)) {
int i = 0;
@ -234,13 +233,7 @@ found:
#endif
cachep = malloc_sizes[i].cs_cachep;
ret = kmem_cache_alloc_node_notrace(cachep, flags, node);
trace_kmalloc_node(_THIS_IP_, ret,
size, slab_buffer_size(cachep),
flags, node);
return ret;
return kmem_cache_alloc_node_trace(size, cachep, flags, node);
}
return __kmalloc_node(size, flags, node);
}

55
include/linux/slub_def.h
View File

@ -10,9 +10,8 @@
#include <linux/gfp.h>
#include <linux/workqueue.h>
#include <linux/kobject.h>
#include <linux/kmemleak.h>
#include <trace/events/kmem.h>
#include <linux/kmemleak.h>
enum stat_item {
ALLOC_FASTPATH, /* Allocation from cpu slab */
@ -216,31 +215,40 @@ static __always_inline struct kmem_cache *kmalloc_slab(size_t size)
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 = (void *) __get_free_pages(flags | __GFP_COMP, order);
kmemleak_alloc(ret, size, 1, flags);
return ret;
}
#ifdef CONFIG_TRACING
extern void *kmem_cache_alloc_notrace(struct kmem_cache *s, gfp_t gfpflags);
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_notrace(struct kmem_cache *s, gfp_t gfpflags)
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);
void *ret = (void *) __get_free_pages(flags | __GFP_COMP, order);
kmemleak_alloc(ret, size, 1, flags);
trace_kmalloc(_THIS_IP_, ret, size, PAGE_SIZE << order, flags);
return ret;
return kmalloc_order_trace(size, flags, order);
}
static __always_inline void *kmalloc(size_t size, gfp_t flags)
{
void *ret;
if (__builtin_constant_p(size)) {
if (size > SLUB_MAX_SIZE)
return kmalloc_large(size, flags);
@ -251,11 +259,7 @@ static __always_inline void *kmalloc(size_t size, gfp_t flags)
if (!s)
return ZERO_SIZE_PTR;
ret = kmem_cache_alloc_notrace(s, flags);
trace_kmalloc(_THIS_IP_, ret, size, s->size, flags);
return ret;
return kmem_cache_alloc_trace(s, flags, size);
}
}
return __kmalloc(size, flags);
@ -266,14 +270,14 @@ 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_notrace(struct kmem_cache *s,
extern void *kmem_cache_alloc_node_trace(struct kmem_cache *s,
gfp_t gfpflags,
int node);
int node, size_t size);
#else
static __always_inline void *
kmem_cache_alloc_node_notrace(struct kmem_cache *s,
kmem_cache_alloc_node_trace(struct kmem_cache *s,
gfp_t gfpflags,
int node)
int node, size_t size)
{
return kmem_cache_alloc_node(s, gfpflags, node);
}
@ -281,8 +285,6 @@ kmem_cache_alloc_node_notrace(struct kmem_cache *s,
static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
{
void *ret;
if (__builtin_constant_p(size) &&
size <= SLUB_MAX_SIZE && !(flags & SLUB_DMA)) {
struct kmem_cache *s = kmalloc_slab(size);
@ -290,12 +292,7 @@ static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
if (!s)
return ZERO_SIZE_PTR;
ret = kmem_cache_alloc_node_notrace(s, flags, node);
trace_kmalloc_node(_THIS_IP_, ret,
size, s->size, flags, node);
return ret;
return kmem_cache_alloc_node_trace(s, flags, node, size);
}
return __kmalloc_node(size, flags, node);
}

38
mm/slab.c
View File

@ -3653,11 +3653,18 @@ void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags)
EXPORT_SYMBOL(kmem_cache_alloc);
#ifdef CONFIG_TRACING
void *kmem_cache_alloc_notrace(struct kmem_cache *cachep, gfp_t flags)
void *
kmem_cache_alloc_trace(size_t size, struct kmem_cache *cachep, gfp_t flags)
{
return __cache_alloc(cachep, flags, __builtin_return_address(0));
void *ret;
ret = __cache_alloc(cachep, flags, __builtin_return_address(0));
trace_kmalloc(_RET_IP_, ret,
size, slab_buffer_size(cachep), flags);
return ret;
}
EXPORT_SYMBOL(kmem_cache_alloc_notrace);
EXPORT_SYMBOL(kmem_cache_alloc_trace);
#endif
#ifdef CONFIG_NUMA
@ -3675,31 +3682,32 @@ void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid)
EXPORT_SYMBOL(kmem_cache_alloc_node);
#ifdef CONFIG_TRACING
void *kmem_cache_alloc_node_notrace(struct kmem_cache *cachep,
gfp_t flags,
int nodeid)
void *kmem_cache_alloc_node_trace(size_t size,
struct kmem_cache *cachep,
gfp_t flags,
int nodeid)
{
return __cache_alloc_node(cachep, flags, nodeid,
void *ret;
ret = __cache_alloc_node(cachep, flags, nodeid,
__builtin_return_address(0));
trace_kmalloc_node(_RET_IP_, ret,
size, slab_buffer_size(cachep),
flags, nodeid);
return ret;
}
EXPORT_SYMBOL(kmem_cache_alloc_node_notrace);
EXPORT_SYMBOL(kmem_cache_alloc_node_trace);
#endif
static __always_inline void *
__do_kmalloc_node(size_t size, gfp_t flags, int node, void *caller)
{
struct kmem_cache *cachep;
void *ret;
cachep = kmem_find_general_cachep(size, flags);
if (unlikely(ZERO_OR_NULL_PTR(cachep)))
return cachep;
ret = kmem_cache_alloc_node_notrace(cachep, flags, node);
trace_kmalloc_node((unsigned long) caller, ret,
size, cachep->buffer_size, flags, node);
return ret;
return kmem_cache_alloc_node_trace(size, cachep, flags, node);
}
#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_TRACING)

30
mm/slub.c
View File

@ -28,6 +28,8 @@
#include <linux/math64.h>
#include <linux/fault-inject.h>
#include <trace/events/kmem.h>
/*
* Lock order:
* 1. slab_lock(page)
@ -1774,11 +1776,21 @@ void *kmem_cache_alloc(struct kmem_cache *s, gfp_t gfpflags)
EXPORT_SYMBOL(kmem_cache_alloc);
#ifdef CONFIG_TRACING
void *kmem_cache_alloc_notrace(struct kmem_cache *s, gfp_t gfpflags)
void *kmem_cache_alloc_trace(struct kmem_cache *s, gfp_t gfpflags, size_t size)
{
return slab_alloc(s, gfpflags, NUMA_NO_NODE, _RET_IP_);
void *ret = slab_alloc(s, gfpflags, NUMA_NO_NODE, _RET_IP_);
trace_kmalloc(_RET_IP_, ret, size, s->size, gfpflags);
return ret;
}
EXPORT_SYMBOL(kmem_cache_alloc_notrace);
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
@ -1794,13 +1806,17 @@ void *kmem_cache_alloc_node(struct kmem_cache *s, gfp_t gfpflags, int node)
EXPORT_SYMBOL(kmem_cache_alloc_node);
#ifdef CONFIG_TRACING
void *kmem_cache_alloc_node_notrace(struct kmem_cache *s,
void *kmem_cache_alloc_node_trace(struct kmem_cache *s,
gfp_t gfpflags,
int node)
int node, size_t size)
{
return slab_alloc(s, gfpflags, node, _RET_IP_);
void *ret = slab_alloc(s, gfpflags, node, _RET_IP_);
trace_kmalloc_node(_RET_IP_, ret,
size, s->size, gfpflags, node);
return ret;
}
EXPORT_SYMBOL(kmem_cache_alloc_node_notrace);
EXPORT_SYMBOL(kmem_cache_alloc_node_trace);
#endif
#endif

6
Documentation/vm/slabinfo.c → tools/slub/slabinfo.c
View File

@ -607,7 +607,7 @@ static int debug_opt_scan(char *opt)
}
for ( ; *opt; opt++)
switch (*opt) {
switch (*opt) {
case 'F' : case 'f':
if (sanity)
return 0;
@ -1127,7 +1127,7 @@ static void read_slab_dir(void)
continue;
switch (de->d_type) {
case DT_LNK:
alias->name = strdup(de->d_name);
alias->name = strdup(de->d_name);
count = readlink(de->d_name, buffer, sizeof(buffer));
if (count < 0)
@ -1143,7 +1143,7 @@ static void read_slab_dir(void)
case DT_DIR:
if (chdir(de->d_name))
fatal("Unable to access slab %s\n", slab->name);
slab->name = strdup(de->d_name);
slab->name = strdup(de->d_name);
slab->alias = 0;
slab->refs = 0;
slab->aliases = get_obj("aliases");