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authorEduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>2008-08-24 20:49:35 +0300
committerPekka Enberg <penberg@cs.helsinki.fi>2008-12-29 15:34:12 +0200
commit94b528d0564997d88e8bf166d8c9080536ad8bdc (patch)
tree257c157b40ce0384bff93640d2cfbb56d875d229
parent73cd6af0413225b0ada8b8881c3e0cfd26506dfa (diff)
downloadop-kernel-dev-94b528d0564997d88e8bf166d8c9080536ad8bdc.zip
op-kernel-dev-94b528d0564997d88e8bf166d8c9080536ad8bdc.tar.gz
kmemtrace: SLUB hooks for caller-tracking functions.
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>
-rw-r--r--mm/slub.c19
1 files changed, 17 insertions, 2 deletions
diff --git a/mm/slub.c b/mm/slub.c
index 4c48a01..4ce61c8 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -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
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