3 files changed, 169 insertions, 20 deletions

diff --git a/mm/slab.c b/mm/slab.c
index d7d1414a5285..4fc1761c6dc8 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -102,6 +102,7 @@
 #include        <linux/cpu.h>
 #include        <linux/sysctl.h>
 #include        <linux/module.h>
+#include        <trace/kmemtrace.h>
 #include        <linux/rcupdate.h>
 #include        <linux/string.h>
 #include        <linux/uaccess.h>
@@ -568,6 +569,14 @@ static void **dbg_userword(struct kmem_cache *cachep, void *objp)
 
 #endif
 
+#ifdef CONFIG_KMEMTRACE
+size_t slab_buffer_size(struct kmem_cache *cachep)
+{
+        return cachep->buffer_size;
+}
+EXPORT_SYMBOL(slab_buffer_size);
+#endif
+
 /*
  * Do not go above this order unless 0 objects fit into the slab.
  */
@@ -3554,10 +3563,23 @@ static inline void __cache_free(struct kmem_cache *cachep, void *objp)
  */
 void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags)
 {
-        return __cache_alloc(cachep, flags, __builtin_return_address(0));
+        void *ret = __cache_alloc(cachep, flags, __builtin_return_address(0));
+
+        kmemtrace_mark_alloc(KMEMTRACE_TYPE_CACHE, _RET_IP_, ret,
+                             obj_size(cachep), cachep->buffer_size, flags);
+
+        return ret;
 }
 EXPORT_SYMBOL(kmem_cache_alloc);
 
+#ifdef CONFIG_KMEMTRACE
+void *kmem_cache_alloc_notrace(struct kmem_cache *cachep, gfp_t flags)
+{
+        return __cache_alloc(cachep, flags, __builtin_return_address(0));
+}
+EXPORT_SYMBOL(kmem_cache_alloc_notrace);
+#endif
+
 /**
  * kmem_ptr_validate - check if an untrusted pointer might be a slab entry.
  * @cachep: the cache we're checking against
@@ -3602,23 +3624,47 @@ out:
 #ifdef CONFIG_NUMA
 void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid)
 {
-        return __cache_alloc_node(cachep, flags, nodeid,
-                        __builtin_return_address(0));
+        void *ret = __cache_alloc_node(cachep, flags, nodeid,
+                                       __builtin_return_address(0));
+
+        kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_CACHE, _RET_IP_, ret,
+                                  obj_size(cachep), cachep->buffer_size,
+                                  flags, nodeid);
+
+        return ret;
 }
 EXPORT_SYMBOL(kmem_cache_alloc_node);
 
+#ifdef CONFIG_KMEMTRACE
+void *kmem_cache_alloc_node_notrace(struct kmem_cache *cachep,
+                                    gfp_t flags,
+                                    int nodeid)
+{
+        return __cache_alloc_node(cachep, flags, nodeid,
+                                  __builtin_return_address(0));
+}
+EXPORT_SYMBOL(kmem_cache_alloc_node_notrace);
+#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;
-        return kmem_cache_alloc_node(cachep, flags, node);
+        ret = kmem_cache_alloc_node_notrace(cachep, flags, node);
+
+        kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KMALLOC,
+                                  (unsigned long) caller, ret,
+                                  size, cachep->buffer_size, flags, node);
+
+        return ret;
 }
 
-#ifdef CONFIG_DEBUG_SLAB
+#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_KMEMTRACE)
 void *__kmalloc_node(size_t size, gfp_t flags, int node)
 {
         return __do_kmalloc_node(size, flags, node,
@@ -3651,6 +3697,7 @@ static __always_inline void *__do_kmalloc(size_t size, gfp_t flags,
                                           void *caller)
 {
         struct kmem_cache *cachep;
+        void *ret;
 
         /* If you want to save a few bytes .text space: replace
          * __ with kmem_.
@@ -3660,11 +3707,17 @@ static __always_inline void *__do_kmalloc(size_t size, gfp_t flags,
         cachep = __find_general_cachep(size, flags);
         if (unlikely(ZERO_OR_NULL_PTR(cachep)))
                 return cachep;
-        return __cache_alloc(cachep, flags, caller);
+        ret = __cache_alloc(cachep, flags, caller);
+
+        kmemtrace_mark_alloc(KMEMTRACE_TYPE_KMALLOC,
+                             (unsigned long) caller, ret,
+                             size, cachep->buffer_size, flags);
+
+        return ret;
 }
 
 
-#ifdef CONFIG_DEBUG_SLAB
+#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_KMEMTRACE)
 void *__kmalloc(size_t size, gfp_t flags)
 {
         return __do_kmalloc(size, flags, __builtin_return_address(0));
@@ -3703,6 +3756,8 @@ void kmem_cache_free(struct kmem_cache *cachep, void *objp)
                 debug_check_no_obj_freed(objp, obj_size(cachep));
         __cache_free(cachep, objp);
         local_irq_restore(flags);
+
+        kmemtrace_mark_free(KMEMTRACE_TYPE_CACHE, _RET_IP_, objp);
 }
 EXPORT_SYMBOL(kmem_cache_free);
 
@@ -3729,6 +3784,8 @@ void kfree(const void *objp)
         debug_check_no_obj_freed(objp, obj_size(c));
         __cache_free(c, (void *)objp);
         local_irq_restore(flags);
+
+        kmemtrace_mark_free(KMEMTRACE_TYPE_KMALLOC, _RET_IP_, objp);
 }
 EXPORT_SYMBOL(kfree);
 
diff --git a/mm/slob.c b/mm/slob.c
index 7a3411524dac..4dd6516447f2 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -65,6 +65,7 @@
 #include <linux/module.h>
 #include <linux/rcupdate.h>
 #include <linux/list.h>
+#include <trace/kmemtrace.h>
 #include <asm/atomic.h>
 
 /*
@@ -474,6 +475,7 @@ void *__kmalloc_node(size_t size, gfp_t gfp, int node)
 {
         unsigned int *m;
         int align = max(ARCH_KMALLOC_MINALIGN, ARCH_SLAB_MINALIGN);
+        void *ret;
 
         lockdep_trace_alloc(gfp);
 
@@ -482,12 +484,17 @@ void *__kmalloc_node(size_t size, gfp_t gfp, int node)
                         return ZERO_SIZE_PTR;
 
                 m = slob_alloc(size + align, gfp, align, node);
+
                 if (!m)
                         return NULL;
                 *m = size;
-                return (void *)m + align;
+                ret = (void *)m + align;
+
+                kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KMALLOC,
+                                          _RET_IP_, ret,
+                                          size, size + align, gfp, node);
         } else {
-                void *ret;
+                unsigned int order = get_order(size);
 
                 ret = slob_new_pages(gfp | __GFP_COMP, get_order(size), node);
                 if (ret) {
@@ -495,8 +502,13 @@ void *__kmalloc_node(size_t size, gfp_t gfp, int node)
                         page = virt_to_page(ret);
                         page->private = size;
                 }
-                return ret;
+
+                kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KMALLOC,
+                                          _RET_IP_, ret,
+                                          size, PAGE_SIZE << order, gfp, node);
         }
+
+        return ret;
 }
 EXPORT_SYMBOL(__kmalloc_node);
 
@@ -514,6 +526,8 @@ void kfree(const void *block)
                 slob_free(m, *m + align);
         } else
                 put_page(&sp->page);
+
+        kmemtrace_mark_free(KMEMTRACE_TYPE_KMALLOC, _RET_IP_, block);
 }
 EXPORT_SYMBOL(kfree);
 
@@ -583,10 +597,19 @@ void *kmem_cache_alloc_node(struct kmem_cache *c, gfp_t flags, int node)
 {
         void *b;
 
-        if (c->size < PAGE_SIZE)
+        if (c->size < PAGE_SIZE) {
                 b = slob_alloc(c->size, flags, c->align, node);
-        else
+                kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_CACHE,
+                                          _RET_IP_, b, c->size,
+                                          SLOB_UNITS(c->size) * SLOB_UNIT,
+                                          flags, node);
+        } else {
                 b = slob_new_pages(flags, get_order(c->size), node);
+                kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_CACHE,
+                                          _RET_IP_, b, c->size,
+                                          PAGE_SIZE << get_order(c->size),
+                                          flags, node);
+        }
 
         if (c->ctor)
                 c->ctor(b);
@@ -622,6 +645,8 @@ void kmem_cache_free(struct kmem_cache *c, void *b)
         } else {
                 __kmem_cache_free(b, c->size);
         }
+
+        kmemtrace_mark_free(KMEMTRACE_TYPE_CACHE, _RET_IP_, b);
 }
 EXPORT_SYMBOL(kmem_cache_free);
 
diff --git a/mm/slub.c b/mm/slub.c
index c4ea9158c9fb..7aaa121d0ea9 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -16,6 +16,7 @@
 #include <linux/slab.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <trace/kmemtrace.h>
 #include <linux/cpu.h>
 #include <linux/cpuset.h>
 #include <linux/mempolicy.h>
@@ -1618,18 +1619,46 @@ static __always_inline void *slab_alloc(struct kmem_cache *s,
 
 void *kmem_cache_alloc(struct kmem_cache *s, gfp_t gfpflags)
 {
-        return slab_alloc(s, gfpflags, -1, _RET_IP_);
+        void *ret = slab_alloc(s, gfpflags, -1, _RET_IP_);
+
+        kmemtrace_mark_alloc(KMEMTRACE_TYPE_CACHE, _RET_IP_, ret,
+                             s->objsize, s->size, gfpflags);
+
+        return ret;
 }
 EXPORT_SYMBOL(kmem_cache_alloc);
 
+#ifdef CONFIG_KMEMTRACE
+void *kmem_cache_alloc_notrace(struct kmem_cache *s, gfp_t gfpflags)
+{
+        return slab_alloc(s, gfpflags, -1, _RET_IP_);
+}
+EXPORT_SYMBOL(kmem_cache_alloc_notrace);
+#endif
+
 #ifdef CONFIG_NUMA
 void *kmem_cache_alloc_node(struct kmem_cache *s, gfp_t gfpflags, int node)
 {
-        return slab_alloc(s, gfpflags, node, _RET_IP_);
+        void *ret = slab_alloc(s, gfpflags, node, _RET_IP_);
+
+        kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_CACHE, _RET_IP_, ret,
+                                  s->objsize, s->size, gfpflags, node);
+
+        return ret;
 }
 EXPORT_SYMBOL(kmem_cache_alloc_node);
 #endif
 
+#ifdef CONFIG_KMEMTRACE
+void *kmem_cache_alloc_node_notrace(struct kmem_cache *s,
+                                    gfp_t gfpflags,
+                                    int node)
+{
+        return slab_alloc(s, gfpflags, node, _RET_IP_);
+}
+EXPORT_SYMBOL(kmem_cache_alloc_node_notrace);
+#endif
+
 /*
  * Slow patch handling. This may still be called frequently since objects
  * have a longer lifetime than the cpu slabs in most processing loads.
@@ -1737,6 +1766,8 @@ void kmem_cache_free(struct kmem_cache *s, void *x)
         page = virt_to_head_page(x);
 
         slab_free(s, page, x, _RET_IP_);
+
+        kmemtrace_mark_free(KMEMTRACE_TYPE_CACHE, _RET_IP_, x);
 }
 EXPORT_SYMBOL(kmem_cache_free);
 
@@ -2659,6 +2690,7 @@ static struct kmem_cache *get_slab(size_t size, gfp_t flags)
 void *__kmalloc(size_t size, gfp_t flags)
 {
         struct kmem_cache *s;
+        void *ret;
 
         if (unlikely(size > SLUB_MAX_SIZE))
                 return kmalloc_large(size, flags);
@@ -2668,7 +2700,12 @@ void *__kmalloc(size_t size, gfp_t flags)
         if (unlikely(ZERO_OR_NULL_PTR(s)))
                 return s;
 
-        return slab_alloc(s, flags, -1, _RET_IP_);
+        ret = slab_alloc(s, flags, -1, _RET_IP_);
+
+        kmemtrace_mark_alloc(KMEMTRACE_TYPE_KMALLOC, _RET_IP_, ret,
+                             size, s->size, flags);
+
+        return ret;
 }
 EXPORT_SYMBOL(__kmalloc);
 
@@ -2687,16 +2724,30 @@ static void *kmalloc_large_node(size_t size, gfp_t flags, int node)
 void *__kmalloc_node(size_t size, gfp_t flags, int node)
 {
         struct kmem_cache *s;
+        void *ret;
 
-        if (unlikely(size > SLUB_MAX_SIZE))
-                return kmalloc_large_node(size, flags, node);
+        if (unlikely(size > SLUB_MAX_SIZE)) {
+                ret = kmalloc_large_node(size, flags, node);
+
+                kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KMALLOC,
+                                          _RET_IP_, ret,
+                                          size, PAGE_SIZE << get_order(size),
+                                          flags, node);
+
+                return ret;
+        }
 
         s = get_slab(size, flags);
 
         if (unlikely(ZERO_OR_NULL_PTR(s)))
                 return s;
 
-        return slab_alloc(s, flags, node, _RET_IP_);
+        ret = slab_alloc(s, flags, node, _RET_IP_);
+
+        kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KMALLOC, _RET_IP_, ret,
+                                  size, s->size, flags, node);
+
+        return ret;
 }
 EXPORT_SYMBOL(__kmalloc_node);
 #endif
@@ -2755,6 +2806,8 @@ void kfree(const void *x)
                 return;
         }
         slab_free(page->slab, page, object, _RET_IP_);
+
+        kmemtrace_mark_free(KMEMTRACE_TYPE_KMALLOC, _RET_IP_, x);
 }
 EXPORT_SYMBOL(kfree);
 
@@ -3224,6 +3277,7 @@ 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 > SLUB_MAX_SIZE))
                 return kmalloc_large(size, gfpflags);
@@ -3233,13 +3287,20 @@ 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, 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 > SLUB_MAX_SIZE))
                 return kmalloc_large_node(size, gfpflags, node);
@@ -3249,7 +3310,13 @@ 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, caller, ret,
+                                  size, s->size, gfpflags, node);
+
+        return ret;
 }
 
 #ifdef CONFIG_SLUB_DEBUG