diff --git a/src/sf_nio.c b/src/sf_nio.c
index b307ed4..1ea93a8 100644
--- a/src/sf_nio.c
+++ b/src/sf_nio.c
@@ -41,8 +41,6 @@
 #include "sf_service.h"
 #include "sf_nio.h"
 
-#define SF_CTX  ((SFContext *)(task->ctx))
-
 void sf_set_parameters_ex(SFContext *sf_context, const int header_size,
         sf_set_body_length_callback set_body_length_func,
         sf_alloc_recv_buffer_callback alloc_recv_buffer_func,
@@ -480,6 +478,7 @@ int sf_client_sock_read(int sock, short event, void *arg)
     int bytes;
     int recv_bytes;
     int total_read;
+    bool new_alloc;
     struct fast_task_info *task;
 
     task = (struct fast_task_info *)arg;
@@ -530,8 +529,12 @@ int sf_client_sock_read(int sock, short event, void *arg)
             bytes = read(sock, task->data + task->offset, recv_bytes);
         } else {
             recv_bytes = task->length - task->offset;
-            bytes = read(sock, task->recv_body + (task->offset -
-                        SF_CTX->header_size), recv_bytes);
+            if (task->recv_body == NULL) {
+                bytes = read(sock, task->data + task->offset, recv_bytes);
+            } else {
+                bytes = read(sock, task->recv_body + (task->offset -
+                            SF_CTX->header_size), recv_bytes);
+            }
         }
 
         if (bytes < 0) {
@@ -614,11 +617,18 @@ int sf_client_sock_read(int sock, short event, void *arg)
             }
 
             if (SF_CTX->alloc_recv_buffer != NULL) {
-                if ((task->recv_body=SF_CTX->alloc_recv_buffer(task)) == NULL) {
+                task->recv_body = SF_CTX->alloc_recv_buffer(task,
+                        task->length - SF_CTX->header_size, &new_alloc);
+                if (new_alloc && task->recv_body == NULL) {
+                    logInfo("recv_body is NULL!!!!!!!!!!!!!!!!!");
                     ioevent_add_to_deleted_list(task);
                     return -1;
                 }
             } else {
+                new_alloc = false;
+            }
+
+            if (!new_alloc) {
                 if (task->length > task->size) {
                     int old_size;
 
@@ -649,8 +659,6 @@ int sf_client_sock_read(int sock, short event, void *arg)
                             "size from %d to %d", __LINE__, task->client_ip,
                             task->length, old_size, task->size);
                 }
-
-                task->recv_body = task->data + SF_CTX->header_size;
             }
         }
 
diff --git a/src/sf_nio.h b/src/sf_nio.h
index 9863e38..fb4b06e 100644
--- a/src/sf_nio.h
+++ b/src/sf_nio.h
@@ -26,6 +26,8 @@
 #include "sf_define.h"
 #include "sf_types.h"
 
+#define SF_CTX  ((SFContext *)(task->ctx))
+
 #ifdef __cplusplus
 extern "C" {
 #endif
diff --git a/src/sf_proto.h b/src/sf_proto.h
index ac0dcb4..4bb93dc 100644
--- a/src/sf_proto.h
+++ b/src/sf_proto.h
@@ -293,7 +293,11 @@ static inline void sf_proto_init_task_context(struct fast_task_info *task,
     ctx->request.header.body_len = task->length - sizeof(SFCommonProtoHeader);
     ctx->request.header.status = buff2short(((SFCommonProtoHeader *)
                 task->data)->status);
-    ctx->request.body = task->data + sizeof(SFCommonProtoHeader);
+    if (task->recv_body != NULL) {
+        ctx->request.body = task->recv_body;
+    } else {
+        ctx->request.body = task->data + sizeof(SFCommonProtoHeader);
+    }
 }
 
 static inline void sf_log_network_error_ex1(SFResponseInfo *response,
diff --git a/src/sf_shared_mbuffer.c b/src/sf_shared_mbuffer.c
index 2e6e691..e5b74ce 100644
--- a/src/sf_shared_mbuffer.c
+++ b/src/sf_shared_mbuffer.c
@@ -19,7 +19,8 @@ static int sf_shared_mbuffer_alloc_init(void *element, void *args)
 {
     SFSharedMBuffer *buffer;
 
-    buffer = (SFSharedMBuffer *)element;
+    buffer = (SFSharedMBuffer *)((char *)element +
+            sizeof(struct fast_allocator_wrapper));
     buffer->buff = (char *)(buffer + 1);
     buffer->ctx = (SFSharedMBufferContext *)args;
     return 0;
diff --git a/src/sf_shared_mbuffer.h b/src/sf_shared_mbuffer.h
index 7ed06bb..abc3f34 100644
--- a/src/sf_shared_mbuffer.h
+++ b/src/sf_shared_mbuffer.h
@@ -16,9 +16,11 @@
 #ifndef _SF_SHARED_MBUFFER_H__
 #define _SF_SHARED_MBUFFER_H__
 
-#include "fastcommon/fast_allocator.h"
+#include "fastcommon/fc_list.h"
+#include "fastcommon/fast_task_queue.h"
 #include "fastcommon/shared_func.h"
 #include "fastcommon/logger.h"
+#include "fastcommon/fast_allocator.h"
 
 typedef struct sf_shared_mbuffer_context {
     struct fast_allocator_context allocator;
@@ -68,6 +70,10 @@ static inline SFSharedMBuffer *sf_shared_mbuffer_alloc_ex(
         fc_sleep_ms(sleep_ms);
     }
 
+    logInfo("file: "__FILE__", line: %d, "
+            "alloc shared buffer: %p, buff: %p",
+            __LINE__, buffer, buffer->buff);
+
     if (init_reffer_count > 0) {
         __sync_add_and_fetch(&buffer->reffer_count, init_reffer_count);
     }
@@ -82,14 +88,20 @@ static inline void sf_shared_mbuffer_hold(SFSharedMBuffer *buffer)
 static inline void sf_shared_mbuffer_release(SFSharedMBuffer *buffer)
 {
     if (__sync_sub_and_fetch(&buffer->reffer_count, 1) == 0) {
-        /*
-        logDebug("file: "__FILE__", line: %d, "
+        logInfo("file: "__FILE__", line: %d, "
                 "free shared buffer: %p", __LINE__, buffer);
-                */
         fast_allocator_free(&buffer->ctx->allocator, buffer);
     }
 }
 
+static inline void sf_release_task_shared_mbuffer(struct fast_task_info *task)
+{
+    SFSharedMBuffer *mbuffer;
+    mbuffer = fc_list_entry(task->recv_body, SFSharedMBuffer, buff);
+    sf_shared_mbuffer_release(mbuffer);
+    task->recv_body = NULL;
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/sf_types.h b/src/sf_types.h
index a7ddfdf..cbaa06b 100644
--- a/src/sf_types.h
+++ b/src/sf_types.h
@@ -37,7 +37,8 @@
 typedef void (*sf_accept_done_callback)(struct fast_task_info *task,
         const bool bInnerPort);
 typedef int (*sf_set_body_length_callback)(struct fast_task_info *task);
-typedef char *(*sf_alloc_recv_buffer_callback)(struct fast_task_info *task);
+typedef char *(*sf_alloc_recv_buffer_callback)(struct fast_task_info *task,
+        const int buff_size, bool *new_alloc);
 typedef int (*sf_deal_task_func)(struct fast_task_info *task, const int stage);
 typedef int (*sf_recv_timeout_callback)(struct fast_task_info *task);