diff --git a/ompi/mca/mpool/mpool.h b/ompi/mca/mpool/mpool.h
index 306c5cdffa..d73685a05f 100644
--- a/ompi/mca/mpool/mpool.h
+++ b/ompi/mca/mpool/mpool.h
@@ -22,7 +22,10 @@
 #include "mca/mca.h"
 #include "info/info.h"
 #include "opal/class/opal_list.h" 
+#include "ompi/class/ompi_pointer_array.h" 
 
+#define MCA_MPOOL_FLAGS_CACHE 0x1
+#define MCA_MPOOL_FLAGS_PERSIST 0x2 
 
 struct mca_mpool_base_resources_t;
 
@@ -33,7 +36,11 @@ struct mca_mpool_base_registration_t {
     unsigned char* base;
     unsigned char* bound; 
     unsigned char* alloc_base; 
+    void* user_data; 
+    uint32_t ref_count; 
+    uint32_t flags;
 };  
+
 typedef struct mca_mpool_base_registration_t mca_mpool_base_registration_t; 
 
 OMPI_DECLSPEC OBJ_CLASS_DECLARATION(mca_mpool_base_registration_t); 
@@ -88,6 +95,26 @@ typedef int (*mca_mpool_base_module_deregister_fn_t)(
     size_t size, 
     mca_mpool_base_registration_t* registration);
 
+/**
+ * find registrations in this memory pool
+ */ 
+
+typedef int (*mca_mpool_base_module_find_fn_t) (
+                                                struct mca_mpool_base_module_t* mpool, 
+                                                void* addr, 
+                                                size_t size, 
+                                                ompi_pointer_array_t* regs 
+                                                ); 
+
+/** 
+ * release registration
+ */ 
+
+typedef int (*mca_mpool_base_module_release_fn_t) ( 
+                                            struct mca_mpool_base_module_t* mpool, 
+                                            mca_mpool_base_registration_t* registration); 
+
+                                            
 /**
   * if appropriate - returns base address of memory pool
   */
@@ -131,6 +158,8 @@ struct mca_mpool_base_module_t {
     mca_mpool_base_module_free_fn_t mpool_free;          /**< free function */
     mca_mpool_base_module_register_fn_t mpool_register;  /**< register memory */
     mca_mpool_base_module_deregister_fn_t mpool_deregister; /**< deregister memory */
+    mca_mpool_base_module_find_fn_t mpool_find; /**< find regisrations in the cache */
+    mca_mpool_base_module_release_fn_t mpool_release; /**< release a regisrtation from the cache */ 
     mca_mpool_base_module_finalize_fn_t mpool_finalize;  /**< finalize */
 };
 /**
diff --git a/ompi/mca/mpool/mvapi/mpool_mvapi.h b/ompi/mca/mpool/mvapi/mpool_mvapi.h
index 240c9475d5..331f8db688 100644
--- a/ompi/mca/mpool/mvapi/mpool_mvapi.h
+++ b/ompi/mca/mpool/mvapi/mpool_mvapi.h
@@ -138,6 +138,20 @@ void mca_mpool_mvapi_free(mca_mpool_base_module_t* mpool,
                          void * addr, 
                          mca_mpool_base_registration_t* registration);
 
+
+int mca_mpool_mvapi_find(
+                         struct mca_mpool_base_module_t* mpool, 
+                         void* addr, 
+                         size_t size, 
+                         ompi_pointer_array_t *regs 
+                         );
+ 
+int mca_mpool_mvapi_release(
+                            struct mca_mpool_base_module_t* mpool, 
+                            mca_mpool_base_registration_t* registraion
+                            ); 
+
+
 #if defined(c_plusplus) || defined(__cplusplus)
 }
 #endif
diff --git a/ompi/mca/mpool/mvapi/mpool_mvapi_module.c b/ompi/mca/mpool/mvapi/mpool_mvapi_module.c
index 8434718bbb..fa2cf8a8e8 100644
--- a/ompi/mca/mpool/mvapi/mpool_mvapi_module.c
+++ b/ompi/mca/mpool/mvapi/mpool_mvapi_module.c
@@ -22,7 +22,7 @@
 #include <vapi_types.h> 
 #include <vapi_common.h> 
 
-/* 
+/*
  *  Initializes the mpool module.
  */ 
 void mca_mpool_mvapi_module_init(mca_mpool_mvapi_module_t* mpool)
@@ -34,6 +34,8 @@ void mca_mpool_mvapi_module_init(mca_mpool_mvapi_module_t* mpool)
     mpool->super.mpool_free = mca_mpool_mvapi_free; 
     mpool->super.mpool_register = mca_mpool_mvapi_register; 
     mpool->super.mpool_deregister = mca_mpool_mvapi_deregister; 
+    mpool->super.mpool_find = mca_mpool_mvapi_find; 
+    mpool->super.mpool_release = mca_mpool_mvapi_release; 
     mpool->super.mpool_finalize = NULL; 
 }
 
@@ -167,6 +169,26 @@ void mca_mpool_mvapi_free(mca_mpool_base_module_t* mpool, void * addr,
 }
 
 
+int mca_mpool_mvapi_find(
+                         struct mca_mpool_base_module_t* mpool, 
+                         void* addr, 
+                         size_t size, 
+                         ompi_pointer_array_t *regs 
+                         ){
+
+    return OMPI_SUCCESS; 
+}
+ 
+int mca_mpool_mvapi_release(
+                            struct mca_mpool_base_module_t* mpool, 
+                            mca_mpool_base_registration_t* registraion
+                            ){
+    return OMPI_SUCCESS; 
+}
+
+
+
+