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kmemtrace: SLUB hooks for caller-tracking functions.

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This patch adds kmemtrace hooks for __kmalloc_track_caller() and
__kmalloc_node_track_caller(). Currently, they set the call site pointer
to the value recieved as a parameter. (This could change if we implement
stack trace exporting in kmemtrace.)

Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
This commit is contained in:
Eduard - Gabriel Munteanu 2008-08-24 20:49:35 +03:00 committed by Pekka Enberg
parent 73cd6af041
commit 94b528d056
1 changed files with 17 additions and 2 deletions
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19
mm/slub.c
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@ -3256,6 +3256,7 @@ static struct notifier_block __cpuinitdata slab_notifier = {
void *__kmalloc_track_caller(size_t size, gfp_t gfpflags, unsigned long caller)
{
struct kmem_cache *s;
void *ret;
if (unlikely(size > PAGE_SIZE))
return kmalloc_large(size, gfpflags);
@ -3265,13 +3266,20 @@ void *__kmalloc_track_caller(size_t size, gfp_t gfpflags, unsigned long caller)
if (unlikely(ZERO_OR_NULL_PTR(s)))
return s;
return slab_alloc(s, gfpflags, -1, caller);
ret = slab_alloc(s, gfpflags, -1, caller);
/* Honor the call site pointer we recieved. */
kmemtrace_mark_alloc(KMEMTRACE_TYPE_KMALLOC, (unsigned long) caller,
ret, size, s->size, gfpflags);
return ret;
}
void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
int node, unsigned long caller)
{
struct kmem_cache *s;
void *ret;
if (unlikely(size > PAGE_SIZE))
return kmalloc_large_node(size, gfpflags, node);
@ -3281,7 +3289,14 @@ void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
if (unlikely(ZERO_OR_NULL_PTR(s)))
return s;
return slab_alloc(s, gfpflags, node, caller);
ret = slab_alloc(s, gfpflags, node, caller);
/* Honor the call site pointer we recieved. */
kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KMALLOC,
(unsigned long) caller, ret,
size, s->size, gfpflags, node);
return ret;
}
#ifdef CONFIG_SLUB_DEBUG