diff --git a/services/surfaceflinger/Android.mk b/services/surfaceflinger/Android.mk
index 6f5947a..0e05d54 100644
--- a/services/surfaceflinger/Android.mk
+++ b/services/surfaceflinger/Android.mk
@@ -9,6 +9,7 @@
     DisplayDevice.cpp \
     DispSync.cpp \
     EventControlThread.cpp \
+    StartBootAnimThread.cpp \
     EventThread.cpp \
     FrameTracker.cpp \
     GpuService.cpp \
diff --git a/services/surfaceflinger/EventControlThread.h b/services/surfaceflinger/EventControlThread.h
index 9368db6..1b1ef75 100644
--- a/services/surfaceflinger/EventControlThread.h
+++ b/services/surfaceflinger/EventControlThread.h
@@ -45,4 +45,4 @@
 
 }
 
-#endif // ANDROID_DISPSYNC_H
+#endif // ANDROID_EVENTCONTROLTHREAD_H
diff --git a/services/surfaceflinger/StartBootAnimThread.cpp b/services/surfaceflinger/StartBootAnimThread.cpp
new file mode 100644
index 0000000..c3f7296
--- /dev/null
+++ b/services/surfaceflinger/StartBootAnimThread.cpp
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <cutils/properties.h>
+#include "StartBootAnimThread.h"
+
+namespace android {
+
+StartBootAnimThread::StartBootAnimThread():
+        Thread(false) {
+}
+
+status_t StartBootAnimThread::Start() {
+    return run("SurfaceFlinger::StartBootAnimThread", PRIORITY_NORMAL);
+}
+
+bool StartBootAnimThread::threadLoop() {
+    property_set("service.bootanim.exit", "0");
+    property_set("ctl.start", "bootanim");
+    // Exit immediately
+    return false;
+}
+
+} // namespace android
diff --git a/services/surfaceflinger/StartBootAnimThread.h b/services/surfaceflinger/StartBootAnimThread.h
new file mode 100644
index 0000000..dba2bee
--- /dev/null
+++ b/services/surfaceflinger/StartBootAnimThread.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_STARTBOOTANIMTHREAD_H
+#define ANDROID_STARTBOOTANIMTHREAD_H
+
+#include <stddef.h>
+
+#include <utils/Mutex.h>
+#include <utils/Thread.h>
+
+namespace android {
+
+class StartBootAnimThread : public Thread {
+// Boot animation is triggered via calls to "property_set()" which can block
+// if init's executing slow operation such as 'mount_all --late' (currently
+// happening 1/10th with fsck)  concurrently. Running in a separate thread
+// allows to pursue the SurfaceFlinger's init process without blocking.
+// see b/34499826.
+public:
+    StartBootAnimThread();
+    status_t Start();
+private:
+    virtual bool threadLoop();
+};
+
+}
+
+#endif // ANDROID_STARTBOOTANIMTHREAD_H
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index c9445e7..9e25e07 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -338,6 +338,9 @@
 
 void SurfaceFlinger::bootFinished()
 {
+    if (mStartBootAnimThread->join() != NO_ERROR) {
+        ALOGE("Join StartBootAnimThread failed!");
+    }
     const nsecs_t now = systemTime();
     const nsecs_t duration = now - mBootTime;
     ALOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
@@ -579,16 +582,22 @@
 
     mRenderEngine->primeCache();
 
-    // start boot animation
-    startBootAnim();
+    mStartBootAnimThread = new StartBootAnimThread();
+    if (mStartBootAnimThread->Start() != NO_ERROR) {
+        ALOGE("Run StartBootAnimThread failed!");
+    }
 
     ALOGV("Done initializing");
 }
 
 void SurfaceFlinger::startBootAnim() {
-    // start boot animation
-    property_set("service.bootanim.exit", "0");
-    property_set("ctl.start", "bootanim");
+    // Start boot animation service by setting a property mailbox
+    // if property setting thread is already running, Start() will be just a NOP
+    mStartBootAnimThread->Start();
+    // Wait until property was set
+    if (mStartBootAnimThread->join() != NO_ERROR) {
+        ALOGE("Join StartBootAnimThread failed!");
+    }
 }
 
 size_t SurfaceFlinger::getMaxTextureSize() const {
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 75c1920..55735b1 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -58,6 +58,7 @@
 #include "LayerVector.h"
 #include "MessageQueue.h"
 #include "SurfaceInterceptor.h"
+#include "StartBootAnimThread.h"
 
 #include "DisplayHardware/HWComposer.h"
 #include "Effects/Daltonizer.h"
@@ -345,6 +346,8 @@
             bool useIdentityTransform, Transform::orientation_flags rotation,
             bool isLocalScreenshot);
 
+    sp<StartBootAnimThread> mStartBootAnimThread = nullptr;
+
     /* ------------------------------------------------------------------------
      * EGL
      */
diff --git a/services/surfaceflinger/SurfaceFlinger_hwc1.cpp b/services/surfaceflinger/SurfaceFlinger_hwc1.cpp
index f8a1f34..aaad0f8 100644
--- a/services/surfaceflinger/SurfaceFlinger_hwc1.cpp
+++ b/services/surfaceflinger/SurfaceFlinger_hwc1.cpp
@@ -317,6 +317,9 @@
 
 void SurfaceFlinger::bootFinished()
 {
+    if (mStartBootAnimThread->join() != NO_ERROR) {
+        ALOGE("Join StartBootAnimThread failed!");
+    }
     const nsecs_t now = systemTime();
     const nsecs_t duration = now - mBootTime;
     ALOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
@@ -589,8 +592,12 @@
 
     mRenderEngine->primeCache();
 
-    // start boot animation
-    startBootAnim();
+    mStartBootAnimThread = new StartBootAnimThread();
+    if (mStartBootAnimThread->Start() != NO_ERROR) {
+        ALOGE("Run StartBootAnimThread failed!");
+    }
+
+    ALOGV("Done initializing");
 }
 
 int32_t SurfaceFlinger::allocateHwcDisplayId(DisplayDevice::DisplayType type) {
@@ -599,9 +606,13 @@
 }
 
 void SurfaceFlinger::startBootAnim() {
-    // start boot animation
-    property_set("service.bootanim.exit", "0");
-    property_set("ctl.start", "bootanim");
+    // Start boot animation service by setting a property mailbox
+    // if property setting thread is already running, Start() will be just a NOP
+    mStartBootAnimThread->Start();
+    // Wait until property was set
+    if (mStartBootAnimThread->join() != NO_ERROR) {
+        ALOGE("Join StartBootAnimThread failed!");
+    }
 }
 
 size_t SurfaceFlinger::getMaxTextureSize() const {