diff --git a/dnn/include/megdnn/oprs/base.h b/dnn/include/megdnn/oprs/base.h
index d111a0c2..21e34794 100644
--- a/dnn/include/megdnn/oprs/base.h
+++ b/dnn/include/megdnn/oprs/base.h
@@ -172,7 +172,10 @@ public:
 
     template <typename T>
     static void serialize_write_pod(const T& val, std::string& result) {
-        static_assert(std::is_standard_layout<T>::value, "invalid type");
+        static_assert(std::is_trivially_copyable<T>::value,
+                      "type should be trivially copyable");
+        static_assert(!std::is_pointer<T>::value,
+                      "serialize pointer is unsafe in eager execution mode");
         result.append(reinterpret_cast<const char*>(&val), sizeof(T));
     }
 
@@ -182,7 +185,7 @@ public:
 
     template <typename T>
     static T deserialize_read_pod(const std::string& data, size_t offset = 0) {
-        static_assert(std::is_standard_layout<T>::value, "invalid type");
+        static_assert(std::is_trivially_copyable<T>::value, "invalid type");
         T ret;
         //! A pointer to an object or incomplete type may be converted to a
         //! pointer to a different object or incomplete type. If the resulting
@@ -197,7 +200,7 @@ public:
 
     template <typename T>
     static T deserialize_read_pod(const char* data, size_t offset = 0) {
-        static_assert(std::is_standard_layout<T>::value, "invalid type");
+        static_assert(std::is_trivially_copyable<T>::value, "invalid type");
         T ret;
         //! A pointer to an object or incomplete type may be converted to a
         //! pointer to a different object or incomplete type. If the resulting
diff --git a/dnn/src/cuda/conv_bias/algo.h b/dnn/src/cuda/conv_bias/algo.h
index af929217..600c540e 100644
--- a/dnn/src/cuda/conv_bias/algo.h
+++ b/dnn/src/cuda/conv_bias/algo.h
@@ -439,7 +439,7 @@ public:
 
     std::string param() const override {
         std::string ret;
-        serialize_write_pod(m_impl, ret);
+        serialize_write_pod(m_impl->name(), ret);
         return ret;
     }
 
diff --git a/dnn/src/cuda/convolution/backward_data/algo.h b/dnn/src/cuda/convolution/backward_data/algo.h
index adf9e0a2..5e7741d8 100644
--- a/dnn/src/cuda/convolution/backward_data/algo.h
+++ b/dnn/src/cuda/convolution/backward_data/algo.h
@@ -238,7 +238,7 @@ public:
 
     std::string param() const override {
         std::string ret;
-        serialize_write_pod(m_impl, ret);
+        serialize_write_pod(m_impl->name(), ret);
         return ret;
     }
 };
diff --git a/dnn/src/cuda/convolution/backward_filter/algo.h b/dnn/src/cuda/convolution/backward_filter/algo.h
index 88c0255f..24611d63 100644
--- a/dnn/src/cuda/convolution/backward_filter/algo.h
+++ b/dnn/src/cuda/convolution/backward_filter/algo.h
@@ -223,7 +223,7 @@ public:
 
     std::string param() const override {
         std::string ret;
-        serialize_write_pod(m_impl, ret);
+        serialize_write_pod(m_impl->name(), ret);
         return ret;
     }
 };
diff --git a/dnn/src/cuda/convolution3d/backward_data/algo.h b/dnn/src/cuda/convolution3d/backward_data/algo.h
index 903c51b1..4d743d26 100644
--- a/dnn/src/cuda/convolution3d/backward_data/algo.h
+++ b/dnn/src/cuda/convolution3d/backward_data/algo.h
@@ -174,7 +174,7 @@ public:
     MEGDNN_DECL_ALGO_TYPE(CUDA_GROUP_CONV_GENERAL)
     std::string param() const override {
         std::string ret;
-        serialize_write_pod(m_impl, ret);
+        serialize_write_pod(m_impl->name(), ret);
         return ret;
     }
 };
diff --git a/dnn/src/cuda/convolution3d/backward_filter/algo.h b/dnn/src/cuda/convolution3d/backward_filter/algo.h
index 844eb815..0581a6c1 100644
--- a/dnn/src/cuda/convolution3d/backward_filter/algo.h
+++ b/dnn/src/cuda/convolution3d/backward_filter/algo.h
@@ -183,7 +183,7 @@ public:
     MEGDNN_DECL_ALGO_TYPE(CUDA_GROUP_CONV_GENERAL)
     std::string param() const override {
         std::string ret;
-        serialize_write_pod(m_impl, ret);
+        serialize_write_pod(m_impl->name(), ret);
         return ret;
     }
 };
diff --git a/dnn/src/cuda/convolution3d/forward/algo.h b/dnn/src/cuda/convolution3d/forward/algo.h
index a27a5ad8..cc9b3dcd 100644
--- a/dnn/src/cuda/convolution3d/forward/algo.h
+++ b/dnn/src/cuda/convolution3d/forward/algo.h
@@ -135,7 +135,7 @@ public:
     MEGDNN_DECL_ALGO_TYPE(CUDA_GROUP_CONV_GENERAL)
     std::string param() const override {
         std::string ret;
-        serialize_write_pod(m_impl, ret);
+        serialize_write_pod(m_impl->name(), ret);
         return ret;
     }
 };
diff --git a/dnn/src/fallback/conv_bias/algos.h b/dnn/src/fallback/conv_bias/algos.h
index 0d057e40..eec52d0d 100644
--- a/dnn/src/fallback/conv_bias/algos.h
+++ b/dnn/src/fallback/conv_bias/algos.h
@@ -67,7 +67,7 @@ public:
     MEGDNN_DECL_ALGO_TYPE(FB_WINOGRAD_F32)
     std::string param() const override {
         std::string ret;
-        serialize_write_pod(m_matmul_algo, ret);
+        serialize_write_pod(m_matmul_algo->name(), ret);
         return ret;
     }
 
@@ -103,7 +103,7 @@ public:
     MEGDNN_DECL_ALGO_TYPE(FB_WINOGRAD_4X4_F32)
     std::string param() const override {
         std::string ret;
-        serialize_write_pod(m_matmul_algo, ret);
+        serialize_write_pod(m_matmul_algo->name(), ret);
         return ret;
     }
 
@@ -139,7 +139,7 @@ public:
     MEGDNN_DECL_ALGO_TYPE(FB_WINOGRAD_QS8)
     std::string param() const override {
         std::string ret;
-        serialize_write_pod(m_matmul_algo, ret);
+        serialize_write_pod(m_matmul_algo->name(), ret);
         return ret;
     }
 
@@ -175,7 +175,7 @@ public:
     MEGDNN_DECL_ALGO_TYPE(FB_WINOGRAD_8X8_QS8)
     std::string param() const override {
         std::string ret;
-        serialize_write_pod(m_matmul_algo, ret);
+        serialize_write_pod(m_matmul_algo->name(), ret);
         return ret;
     }
 
diff --git a/dnn/src/fallback/conv_bias/common.h b/dnn/src/fallback/conv_bias/common.h
index cba6509f..d297492b 100644
--- a/dnn/src/fallback/conv_bias/common.h
+++ b/dnn/src/fallback/conv_bias/common.h
@@ -157,7 +157,7 @@ using BiasMode = ConvBiasForward::BiasMode;
     }                                                                          \
     std::string param() const override {                                       \
         std::string ret;                                                       \
-        serialize_write_pod(m_matmul_algo, ret);                               \
+        serialize_write_pod(m_matmul_algo->name(), ret);                       \
         serialize_write_pod(m_tile_size, ret);                                 \
         return ret;                                                            \
     }                                                                          \
diff --git a/dnn/src/fallback/conv_bias/conv1x1/algos.h b/dnn/src/fallback/conv_bias/conv1x1/algos.h
index 18f98900..e777fd95 100644
--- a/dnn/src/fallback/conv_bias/conv1x1/algos.h
+++ b/dnn/src/fallback/conv_bias/conv1x1/algos.h
@@ -65,7 +65,7 @@ public:
     MEGDNN_DECL_ALGO_TYPE(FB_WINOGRAD_8X8_QS8)
     std::string param() const override {
         std::string ret;
-        serialize_write_pod(m_matmul_algo, ret);
+        serialize_write_pod(m_matmul_algo->name(), ret);
         serialize_write_pod(m_oc_block_size, ret);
         return ret;
     }
diff --git a/dnn/src/fallback/conv_bias/im2col/algos.h b/dnn/src/fallback/conv_bias/im2col/algos.h
index be255df6..d87e4b52 100644
--- a/dnn/src/fallback/conv_bias/im2col/algos.h
+++ b/dnn/src/fallback/conv_bias/im2col/algos.h
@@ -74,7 +74,7 @@ public:
 
     std::string param() const override {
         std::string ret;
-        serialize_write_pod(m_matmul_algo, ret);
+        serialize_write_pod(m_matmul_algo->name(), ret);
         serialize_write_pod(m_ohw_tile_size, ret);
         return ret;
     }
diff --git a/dnn/src/fallback/convolution/algos.h b/dnn/src/fallback/convolution/algos.h
index fa8dde27..7da12fcb 100644
--- a/dnn/src/fallback/convolution/algos.h
+++ b/dnn/src/fallback/convolution/algos.h
@@ -157,7 +157,7 @@ public:
 
     std::string param() const override {
         std::string ret;
-        serialize_write_pod(m_algorithm, ret);
+        serialize_write_pod(m_algorithm->name(), ret);
         return ret;
     }