diff --git a/arch/sim/src/sim/sim_heap.c b/arch/sim/src/sim/sim_heap.c
index ba3c266035..b435f6c5e8 100644
--- a/arch/sim/src/sim/sim_heap.c
+++ b/arch/sim/src/sim/sim_heap.c
@@ -186,7 +186,7 @@ static void mm_delayfree(struct mm_heap_s *heap, void *mem, bool delay)
       int size = host_mallocsize(mem);
       atomic_fetch_sub(&heap->aordblks, 1);
       atomic_fetch_sub(&heap->uordblks, size);
-      sched_note_heap(false, heap, mem, size);
+      sched_note_heap(NOTE_HEAP_FREE, heap, mem, size);
       host_free(mem);
     }
 }
@@ -388,10 +388,10 @@ void *mm_realloc(struct mm_heap_s *heap, void *oldmem,
     {
       if (oldmem != NULL)
         {
-          sched_note_heap(false, heap, oldmem, oldsize);
+          sched_note_heap(NOTE_HEAP_FREE, heap, oldmem, oldsize);
         }
 
-      sched_note_heap(true, heap, mem, newsize);
+      sched_note_heap(NOTE_HEAP_ALLOC, heap, mem, newsize);
     }
 
   do
@@ -483,7 +483,7 @@ void *mm_memalign(struct mm_heap_s *heap, size_t alignment, size_t size)
     }
 
   size = host_mallocsize(mem);
-  sched_note_heap(true, heap, mem, size);
+  sched_note_heap(NOTE_HEAP_ALLOC, heap, mem, size);
   atomic_fetch_add(&heap->aordblks, 1);
   atomic_fetch_add(&heap->uordblks, size);
   usmblks = atomic_load(&heap->usmblks);
diff --git a/drivers/note/note_driver.c b/drivers/note/note_driver.c
index 96cac54ab7..232efde066 100644
--- a/drivers/note/note_driver.c
+++ b/drivers/note/note_driver.c
@@ -1355,7 +1355,8 @@ void sched_note_irqhandler(int irq, FAR void *handler, bool enter)
 #endif
 
 #ifdef CONFIG_SCHED_INSTRUMENTATION_HEAP
-void sched_note_heap(bool alloc, FAR void *heap, FAR void *mem, size_t size)
+void sched_note_heap(uint8_t event, FAR void *heap, FAR void *mem,
+                     size_t size)
 {
   FAR struct note_driver_s **driver;
   struct note_heap_s note;
@@ -1371,7 +1372,7 @@ void sched_note_heap(bool alloc, FAR void *heap, FAR void *mem, size_t size)
 
   for (driver = g_note_drivers; *driver; driver++)
     {
-      if (note_heap(*driver, alloc, heap, mem, size))
+      if (note_heap(*driver, event, heap, mem, size))
         {
           continue;
         }
@@ -1383,9 +1384,8 @@ void sched_note_heap(bool alloc, FAR void *heap, FAR void *mem, size_t size)
 
       if (!formatted)
         {
-          enum note_type_e type = alloc ? NOTE_ALLOC : NOTE_FREE;
           formatted = true;
-          note_common(tcb, &note.nmm_cmn, sizeof(note), type);
+          note_common(tcb, &note.nmm_cmn, sizeof(note), event);
           note.heap = heap;
           note.mem = mem;
           note.size = size;
diff --git a/drivers/note/noteram_driver.c b/drivers/note/noteram_driver.c
index f6ba276e3f..754f804486 100644
--- a/drivers/note/noteram_driver.c
+++ b/drivers/note/noteram_driver.c
@@ -1086,8 +1086,8 @@ static int noteram_dump_one(FAR uint8_t *p, FAR struct lib_outstream_s *s,
       break;
 #endif
 #ifdef CONFIG_SCHED_INSTRUMENTATION_HEAP
-    case NOTE_ALLOC:
-    case NOTE_FREE:
+    case NOTE_HEAP_ALLOC:
+    case NOTE_HEAP_FREE:
       {
         FAR struct note_heap_s *nmm = (FAR struct note_heap_s *)p;
         FAR struct noteram_dump_task_context_s *tctx;
@@ -1100,7 +1100,7 @@ static int noteram_dump_one(FAR uint8_t *p, FAR struct lib_outstream_s *s,
         tctx = noteram_dump_find_task_context(ctx, pid);
         if (tctx != NULL)
           {
-            tctx->mm_used += note->nc_type == NOTE_FREE ?
+            tctx->mm_used += note->nc_type == NOTE_HEAP_FREE ?
                              -nmm->size : nmm->size;
             used = tctx->mm_used;
           }
@@ -1108,7 +1108,7 @@ static int noteram_dump_one(FAR uint8_t *p, FAR struct lib_outstream_s *s,
         ret += noteram_dump_header(s, &nmm->nmm_cmn, ctx);
         ret += lib_sprintf(s, "tracing_mark_write: C|%d|Heap Usage|%d|%s"
                            ": heap: %p size:%" PRIiPTR ", address: %p\n",
-                           pid, used, name[note->nc_type - NOTE_ALLOC],
+                           pid, used, name[note->nc_type - NOTE_HEAP_ALLOC],
                            nmm->heap, nmm->size, nmm->mem);
       }
       break;
diff --git a/include/nuttx/note/note_driver.h b/include/nuttx/note/note_driver.h
index a36da233b4..5372e14643 100644
--- a/include/nuttx/note/note_driver.h
+++ b/include/nuttx/note/note_driver.h
@@ -90,7 +90,7 @@ struct note_driver_ops_s
                           FAR void *handler, bool enter);
 #endif
 #ifdef CONFIG_SCHED_INSTRUMENTATION_HEAP
-  CODE void (*heap)(FAR struct note_driver_s *drv, bool alloc,
+  CODE void (*heap)(FAR struct note_driver_s *drv, uint8_t event,
                     FAR void *heap, FAR void *mem, size_t size);
 #endif
 #ifdef CONFIG_SCHED_INSTRUMENTATION_DUMP
diff --git a/include/nuttx/sched_note.h b/include/nuttx/sched_note.h
index cdc0145b22..44947751dd 100644
--- a/include/nuttx/sched_note.h
+++ b/include/nuttx/sched_note.h
@@ -186,9 +186,8 @@ enum note_type_e
   NOTE_SYSCALL_LEAVE,
   NOTE_IRQ_ENTER,
   NOTE_IRQ_LEAVE,
-  NOTE_ALLOC,
-  NOTE_FREE,
-  NOTE_REALLOC,
+  NOTE_HEAP_ALLOC,
+  NOTE_HEAP_FREE,
   NOTE_DUMP_STRING,
   NOTE_DUMP_BINARY,
   NOTE_DUMP_BEGIN,
@@ -383,6 +382,14 @@ struct note_irqhandler_s
   uint8_t nih_irq;              /* IRQ number */
 };
 
+struct note_heap_s
+{
+  struct note_common_s nmm_cmn;      /* Common note parameters */
+  FAR void *heap;
+  FAR void *mem;
+  size_t size;
+};
+
 struct note_string_s
 {
   struct note_common_s nst_cmn;      /* Common note parameters */
@@ -403,14 +410,6 @@ struct note_binary_s
 #define SIZEOF_NOTE_BINARY(n) (sizeof(struct note_binary_s) + \
                                ((n) - 1) * sizeof(uint8_t))
 
-struct note_heap_s
-{
-  struct note_common_s nmm_cmn;      /* Common note parameters */
-  FAR void *heap;
-  FAR void *mem;
-  size_t size;
-};
-
 struct note_counter_s
 {
   long int value;
@@ -554,9 +553,10 @@ void sched_note_irqhandler(int irq, FAR void *handler, bool enter);
 #endif
 
 #ifdef CONFIG_SCHED_INSTRUMENTATION_HEAP
-void sched_note_heap(bool alloc, FAR void *heap, FAR void *mem, size_t size);
+void sched_note_heap(uint8_t event, FAR void *heap, FAR void *mem,
+                     size_t size);
 #else
-#  define sched_note_heap(a,h,m,s)
+#  define sched_note_heap(e,h,m,s)
 #endif
 
 #ifdef CONFIG_SCHED_INSTRUMENTATION_DUMP
diff --git a/mm/mm_heap/mm_free.c b/mm/mm_heap/mm_free.c
index 7afac84668..5a1dcb7989 100644
--- a/mm/mm_heap/mm_free.c
+++ b/mm/mm_heap/mm_free.c
@@ -128,7 +128,7 @@ void mm_delayfree(FAR struct mm_heap_s *heap, FAR void *mem, bool delay)
   /* Update heap statistics */
 
   heap->mm_curused -= nodesize;
-  sched_note_heap(false, heap, mem, nodesize);
+  sched_note_heap(NOTE_HEAP_FREE, heap, mem, nodesize);
 
   /* Check if the following node is free and, if so, merge it */
 
diff --git a/mm/mm_heap/mm_malloc.c b/mm/mm_heap/mm_malloc.c
index fd72eeb007..4345fc1f4b 100644
--- a/mm/mm_heap/mm_malloc.c
+++ b/mm/mm_heap/mm_malloc.c
@@ -327,7 +327,7 @@ FAR void *mm_malloc(FAR struct mm_heap_s *heap, size_t size)
     {
       MM_ADD_BACKTRACE(heap, node);
       ret = kasan_unpoison(ret, nodesize - MM_ALLOCNODE_OVERHEAD);
-      sched_note_heap(true, heap, ret, nodesize);
+      sched_note_heap(NOTE_HEAP_ALLOC, heap, ret, nodesize);
 #ifdef CONFIG_MM_FILL_ALLOCATIONS
       memset(ret, MM_ALLOC_MAGIC, alignsize - MM_ALLOCNODE_OVERHEAD);
 #endif
diff --git a/mm/mm_heap/mm_memalign.c b/mm/mm_heap/mm_memalign.c
index 1d963055b2..d446c600bc 100644
--- a/mm/mm_heap/mm_memalign.c
+++ b/mm/mm_heap/mm_memalign.c
@@ -281,7 +281,8 @@ FAR void *mm_memalign(FAR struct mm_heap_s *heap, size_t alignment,
 
   alignedchunk = (uintptr_t)kasan_unpoison((FAR const void *)alignedchunk,
                                            size - MM_ALLOCNODE_OVERHEAD);
-  sched_note_heap(true, heap, (FAR void *)alignedchunk, size);
+  sched_note_heap(NOTE_HEAP_ALLOC, heap, (FAR void *)alignedchunk, size);
+
   DEBUGASSERT(alignedchunk % alignment == 0);
   return (FAR void *)alignedchunk;
 }
diff --git a/mm/mm_heap/mm_realloc.c b/mm/mm_heap/mm_realloc.c
index f1f1284b55..a6e67d8ce2 100644
--- a/mm/mm_heap/mm_realloc.c
+++ b/mm/mm_heap/mm_realloc.c
@@ -383,8 +383,8 @@ FAR void *mm_realloc(FAR struct mm_heap_s *heap, FAR void *oldmem,
           heap->mm_maxused = heap->mm_curused;
         }
 
-      sched_note_heap(false, heap, oldmem, oldsize);
-      sched_note_heap(true, heap, newmem, newsize);
+      sched_note_heap(NOTE_HEAP_FREE, heap, oldmem, oldsize);
+      sched_note_heap(NOTE_HEAP_ALLOC, heap, newmem, newsize);
       mm_unlock(heap);
       MM_ADD_BACKTRACE(heap, (FAR char *)newmem - MM_SIZEOF_ALLOCNODE);
 
diff --git a/mm/tlsf/mm_tlsf.c b/mm/tlsf/mm_tlsf.c
index 6962eed550..51d351651e 100644
--- a/mm/tlsf/mm_tlsf.c
+++ b/mm/tlsf/mm_tlsf.c
@@ -510,8 +510,8 @@ static void mm_delayfree(FAR struct mm_heap_s *heap, FAR void *mem,
         {
           /* Update heap statistics */
 
-          heap->mm_curused -= mm_malloc_size(heap, mem);
-          sched_note_heap(false, heap, mem, size);
+          heap->mm_curused -= size;
+          sched_note_heap(NOTE_HEAP_FREE, heap, mem, size);
           tlsf_free(heap->mm_tlsf, mem);
         }
 
@@ -1189,7 +1189,7 @@ FAR void *mm_malloc(FAR struct mm_heap_s *heap, size_t size)
 #endif
 
       ret = kasan_unpoison(ret, nodesize);
-      sched_note_heap(true, heap, ret, nodesize);
+      sched_note_heap(NOTE_HEAP_ALLOC, heap, ret, nodesize);
 
 #ifdef CONFIG_MM_FILL_ALLOCATIONS
       memset(ret, 0xaa, nodesize);
@@ -1269,7 +1269,7 @@ FAR void *mm_memalign(FAR struct mm_heap_s *heap, size_t alignment,
       memdump_backtrace(heap, buf);
 #endif
       ret = kasan_unpoison(ret, nodesize);
-      sched_note_heap(true, heap, ret, nodesize);
+      sched_note_heap(NOTE_HEAP_ALLOC, heap, ret, nodesize);
     }
 
 #if CONFIG_MM_FREE_DELAYCOUNT_MAX > 0
@@ -1397,8 +1397,8 @@ FAR void *mm_realloc(FAR struct mm_heap_s *heap, FAR void *oldmem,
       memdump_backtrace(heap, buf);
 #endif
 
-      sched_note_heap(false, heap, oldmem, oldsize);
-      sched_note_heap(true, heap, newmem, newsize);
+      sched_note_heap(NOTE_HEAP_FREE, heap, oldmem, oldsize);
+      sched_note_heap(NOTE_HEAP_ALLOC, heap, newmem, newsize);
     }
 
 #if CONFIG_MM_FREE_DELAYCOUNT_MAX > 0
diff --git a/sched/Kconfig b/sched/Kconfig
index 06fd953df0..63b27f3752 100644
--- a/sched/Kconfig
+++ b/sched/Kconfig
@@ -1290,7 +1290,7 @@ config SCHED_INSTRUMENTATION_HEAP
 	---help---
 		Enables additional hooks for heap allocation.
 
-			void sched_note_heap(bool alloc, FAR void* heap, FAR void *mem, size_t size)
+			void sched_note_heap(uint8_t event, FAR void* heap, FAR void *mem, size_t size);
 
 config SCHED_INSTRUMENTATION_DUMP
 	bool "Use note dump for instrumentation"