diff --git a/runtime/java_vm_ext.cc b/runtime/java_vm_ext.cc
index 0ac5b88..1444d97 100644
--- a/runtime/java_vm_ext.cc
+++ b/runtime/java_vm_ext.cc
@@ -36,9 +36,6 @@
 
 namespace art {
 
-static const size_t kPinTableInitial = 16;  // Arbitrary.
-static const size_t kPinTableMax = 1024;  // Arbitrary sanity check.
-
 static size_t gGlobalsInitial = 512;  // Arbitrary.
 static size_t gGlobalsMax = 51200;  // Arbitrary sanity check. (Must fit in 16 bits.)
 
@@ -365,8 +362,6 @@
       force_copy_(options->force_copy_),
       tracing_enabled_(!options->jni_trace_.empty() || VLOG_IS_ON(third_party_jni)),
       trace_(options->jni_trace_),
-      pins_lock_("JNI pin table lock", kPinTableLock),
-      pin_table_("pin table", kPinTableInitial, kPinTableMax),
       globals_lock_("JNI global reference table lock"),
       globals_(gGlobalsInitial, gGlobalsMax, kGlobal),
       libraries_(new Libraries),
@@ -523,10 +518,6 @@
   }
   Thread* self = Thread::Current();
   {
-    MutexLock mu(self, pins_lock_);
-    os << "; pins=" << pin_table_.Size();
-  }
-  {
     ReaderMutexLock mu(self, globals_lock_);
     os << "; globals=" << globals_.Capacity();
   }
@@ -568,16 +559,6 @@
   return weak_globals_.Get(ref);
 }
 
-void JavaVMExt::PinPrimitiveArray(Thread* self, mirror::Array* array) {
-  MutexLock mu(self, pins_lock_);
-  pin_table_.Add(array);
-}
-
-void JavaVMExt::UnpinPrimitiveArray(Thread* self, mirror::Array* array) {
-  MutexLock mu(self, pins_lock_);
-  pin_table_.Remove(array);
-}
-
 void JavaVMExt::DumpReferenceTables(std::ostream& os) {
   Thread* self = Thread::Current();
   {
@@ -588,10 +569,6 @@
     MutexLock mu(self, weak_globals_lock_);
     weak_globals_.Dump(os);
   }
-  {
-    MutexLock mu(self, pins_lock_);
-    pin_table_.Dump(os);
-  }
 }
 
 bool JavaVMExt::LoadNativeLibrary(JNIEnv* env, const std::string& path, jobject class_loader,
@@ -779,10 +756,6 @@
     ReaderMutexLock mu(self, globals_lock_);
     globals_.VisitRoots(callback, arg, 0, kRootJNIGlobal);
   }
-  {
-    MutexLock mu(self, pins_lock_);
-    pin_table_.VisitRoots(callback, arg, 0, kRootVMInternal);
-  }
   // The weak_globals table is visited by the GC itself (because it mutates the table).
 }
 
diff --git a/runtime/java_vm_ext.h b/runtime/java_vm_ext.h
index da0b8e3..2957ba3 100644
--- a/runtime/java_vm_ext.h
+++ b/runtime/java_vm_ext.h
@@ -95,7 +95,7 @@
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
   void DumpForSigQuit(std::ostream& os)
-      LOCKS_EXCLUDED(Locks::jni_libraries_lock_, globals_lock_, weak_globals_lock_, pins_lock_);
+      LOCKS_EXCLUDED(Locks::jni_libraries_lock_, globals_lock_, weak_globals_lock_);
 
   void DumpReferenceTables(std::ostream& os)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
@@ -127,14 +127,6 @@
   mirror::Object* DecodeWeakGlobal(Thread* self, IndirectRef ref)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
-  void PinPrimitiveArray(Thread* self, mirror::Array* array)
-      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
-      LOCKS_EXCLUDED(pins_lock_);
-
-  void UnpinPrimitiveArray(Thread* self, mirror::Array* array)
-      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
-      LOCKS_EXCLUDED(pins_lock_);
-
   const JNIInvokeInterface* GetUncheckedFunctions() const {
     return unchecked_functions_;
   }
@@ -154,10 +146,6 @@
   // Extra diagnostics.
   const std::string trace_;
 
-  // Used to hold references to pinned primitive arrays.
-  Mutex pins_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
-  ReferenceTable pin_table_ GUARDED_BY(pins_lock_);
-
   // JNI global references.
   ReaderWriterMutex globals_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
   // Not guarded by globals_lock since we sometimes use SynchronizedGet in Thread::DecodeJObject.
diff --git a/runtime/jni_internal.cc b/runtime/jni_internal.cc
index 3e9ae09..36f01db 100644
--- a/runtime/jni_internal.cc
+++ b/runtime/jni_internal.cc
@@ -1695,7 +1695,6 @@
     ScopedObjectAccess soa(env);
     mirror::String* s = soa.Decode<mirror::String*>(java_string);
     mirror::CharArray* chars = s->GetCharArray();
-    soa.Vm()->PinPrimitiveArray(soa.Self(), chars);
     gc::Heap* heap = Runtime::Current()->GetHeap();
     if (heap->IsMovableObject(chars)) {
       if (is_copy != nullptr) {
@@ -1724,7 +1723,6 @@
     if (chars != (s_chars->GetData() + s->GetOffset())) {
       delete[] chars;
     }
-    soa.Vm()->UnpinPrimitiveArray(soa.Self(), s->GetCharArray());
   }
 
   static const jchar* GetStringCritical(JNIEnv* env, jstring java_string, jboolean* is_copy) {
@@ -1733,7 +1731,6 @@
     mirror::String* s = soa.Decode<mirror::String*>(java_string);
     mirror::CharArray* chars = s->GetCharArray();
     int32_t offset = s->GetOffset();
-    soa.Vm()->PinPrimitiveArray(soa.Self(), chars);
     gc::Heap* heap = Runtime::Current()->GetHeap();
     if (heap->IsMovableObject(chars)) {
       StackHandleScope<1> hs(soa.Self());
@@ -1749,8 +1746,6 @@
   static void ReleaseStringCritical(JNIEnv* env, jstring java_string, const jchar* chars) {
     CHECK_NON_NULL_ARGUMENT_RETURN_VOID(java_string);
     ScopedObjectAccess soa(env);
-    soa.Vm()->UnpinPrimitiveArray(soa.Self(),
-                                  soa.Decode<mirror::String*>(java_string)->GetCharArray());
     gc::Heap* heap = Runtime::Current()->GetHeap();
     mirror::String* s = soa.Decode<mirror::String*>(java_string);
     mirror::CharArray* s_chars = s->GetCharArray();
@@ -1906,7 +1901,6 @@
       // Re-decode in case the object moved since IncrementDisableGC waits for GC to complete.
       array = soa.Decode<mirror::Array*>(java_array);
     }
-    soa.Vm()->PinPrimitiveArray(soa.Self(), array);
     if (is_copy != nullptr) {
       *is_copy = JNI_FALSE;
     }
@@ -2331,7 +2325,6 @@
     if (UNLIKELY(array == nullptr)) {
       return nullptr;
     }
-    soa.Vm()->PinPrimitiveArray(soa.Self(), array);
     // Only make a copy if necessary.
     if (Runtime::Current()->GetHeap()->IsMovableObject(array)) {
       if (is_copy != nullptr) {
@@ -2394,7 +2387,6 @@
         // Non copy to a movable object must means that we had disabled the moving GC.
         heap->DecrementDisableMovingGC(soa.Self());
       }
-      soa.Vm()->UnpinPrimitiveArray(soa.Self(), array);
     }
   }