diff --git a/init/Android.bp b/init/Android.bp
index 776a3a6..d939fcc 100644
--- a/init/Android.bp
+++ b/init/Android.bp
@@ -65,6 +65,7 @@
         "libavb",
         "libc++fs",
         "libcgrouprc_format",
+        "liblmkd_utils",
         "libmodprobe",
         "libprotobuf-cpp-lite",
         "libpropertyinfoserializer",
@@ -118,6 +119,7 @@
         "init.cpp",
         "interface_utils.cpp",
         "keychords.cpp",
+        "lmkd_service.cpp",
         "modalias_handler.cpp",
         "mount_handler.cpp",
         "mount_namespace.cpp",
diff --git a/init/init.cpp b/init/init.cpp
index f775d8f..6ea2d00 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -59,6 +59,7 @@
 #include "first_stage_mount.h"
 #include "import_parser.h"
 #include "keychords.h"
+#include "lmkd_service.h"
 #include "mount_handler.h"
 #include "mount_namespace.h"
 #include "property_service.h"
@@ -684,9 +685,15 @@
     InitKernelLogging(argv);
     LOG(INFO) << "init second stage started!";
 
+    // Will handle EPIPE at the time of write by checking the errno
+    signal(SIGPIPE, SIG_IGN);
+
     // Set init and its forked children's oom_adj.
-    if (auto result = WriteFile("/proc/1/oom_score_adj", "-1000"); !result) {
-        LOG(ERROR) << "Unable to write -1000 to /proc/1/oom_score_adj: " << result.error();
+    if (auto result =
+                WriteFile("/proc/1/oom_score_adj", StringPrintf("%d", DEFAULT_OOM_SCORE_ADJUST));
+        !result) {
+        LOG(ERROR) << "Unable to write " << DEFAULT_OOM_SCORE_ADJUST
+                   << " to /proc/1/oom_score_adj: " << result.error();
     }
 
     // Set up a session keyring that all processes will have access to. It
diff --git a/init/lmkd_service.cpp b/init/lmkd_service.cpp
new file mode 100644
index 0000000..dd1ab4d
--- /dev/null
+++ b/init/lmkd_service.cpp
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2019 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 "lmkd_service.h"
+
+#include <errno.h>
+
+#include <android-base/logging.h>
+#include <liblmkd_utils.h>
+
+#include "service_list.h"
+
+namespace android {
+namespace init {
+
+enum LmkdRegistrationResult {
+    LMKD_REG_SUCCESS,
+    LMKD_CONN_FAILED,
+    LMKD_REG_FAILED,
+};
+
+static int lmkd_socket = -1;
+
+static LmkdRegistrationResult RegisterProcess(uid_t uid, pid_t pid, int oom_score_adjust) {
+    // connect to lmkd if not already connected
+    if (lmkd_socket < 0) {
+        lmkd_socket = lmkd_connect();
+        if (lmkd_socket < 0) {
+            return LMKD_CONN_FAILED;
+        }
+    }
+
+    // register service with lmkd
+    struct lmk_procprio params;
+    params.pid = pid;
+    params.uid = uid;
+    params.oomadj = oom_score_adjust;
+    params.ptype = PROC_TYPE_SERVICE;
+    if (lmkd_register_proc(lmkd_socket, &params) != 0) {
+        // data transfer failed, reset the connection
+        close(lmkd_socket);
+        lmkd_socket = -1;
+        return LMKD_REG_FAILED;
+    }
+
+    return LMKD_REG_SUCCESS;
+}
+
+static bool UnregisterProcess(pid_t pid) {
+    if (lmkd_socket < 0) {
+        // no connection or it was lost, no need to unregister
+        return false;
+    }
+
+    // unregister service
+    struct lmk_procremove params;
+    params.pid = pid;
+    if (lmkd_unregister_proc(lmkd_socket, &params) != 0) {
+        // data transfer failed, reset the connection
+        close(lmkd_socket);
+        lmkd_socket = -1;
+        return false;
+    }
+
+    return true;
+}
+
+static void RegisterServices(pid_t exclude_pid) {
+    for (const auto& service : ServiceList::GetInstance().services()) {
+        auto svc = service.get();
+        if (svc->oom_score_adjust() != DEFAULT_OOM_SCORE_ADJUST) {
+            // skip if process is excluded or not yet forked (pid==0)
+            if (svc->pid() == exclude_pid || svc->pid() == 0) {
+                continue;
+            }
+            if (RegisterProcess(svc->uid(), svc->pid(), svc->oom_score_adjust()) !=
+                LMKD_REG_SUCCESS) {
+                // a failure here resets the connection, will retry during next registration
+                break;
+            }
+        }
+    }
+}
+
+void LmkdRegister(const std::string& name, uid_t uid, pid_t pid, int oom_score_adjust) {
+    bool new_connection = lmkd_socket == -1;
+    LmkdRegistrationResult result;
+
+    result = RegisterProcess(uid, pid, oom_score_adjust);
+    if (result == LMKD_REG_FAILED) {
+        // retry one time if connection to lmkd was lost
+        result = RegisterProcess(uid, pid, oom_score_adjust);
+        new_connection = result == LMKD_REG_SUCCESS;
+    }
+    switch (result) {
+        case LMKD_REG_SUCCESS:
+            // register existing services once new connection is established
+            if (new_connection) {
+                RegisterServices(pid);
+            }
+            break;
+        case LMKD_CONN_FAILED:
+            PLOG(ERROR) << "lmkd connection failed when " << name << " process got started";
+            break;
+        case LMKD_REG_FAILED:
+            PLOG(ERROR) << "lmkd failed to register " << name << " process";
+            break;
+    }
+}
+
+void LmkdUnregister(const std::string& name, pid_t pid) {
+    if (!UnregisterProcess(pid)) {
+        PLOG(ERROR) << "lmkd failed to unregister " << name << " process";
+    }
+}
+
+}  // namespace init
+}  // namespace android
diff --git a/init/lmkd_service.h b/init/lmkd_service.h
new file mode 100644
index 0000000..5b51d52
--- /dev/null
+++ b/init/lmkd_service.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#pragma once
+
+#include <sys/types.h>
+
+#include <string>
+
+namespace android {
+namespace init {
+
+static const int MIN_OOM_SCORE_ADJUST = -1000;
+static const int MAX_OOM_SCORE_ADJUST = 1000;
+// service with default score is unkillable
+static const int DEFAULT_OOM_SCORE_ADJUST = MIN_OOM_SCORE_ADJUST;
+
+#if defined(__ANDROID__)
+
+void LmkdRegister(const std::string& name, uid_t uid, pid_t pid, int oom_score_adjust);
+void LmkdUnregister(const std::string& name, pid_t pid);
+
+#else  // defined(__ANDROID__)
+
+static inline void LmkdRegister(const std::string&, uid_t, pid_t, int) {}
+static inline void LmkdUnregister(const std::string&, pid_t) {}
+
+#endif  // defined(__ANDROID__)
+
+}  // namespace init
+}  // namespace android
diff --git a/init/service.cpp b/init/service.cpp
index c8568a0..f8e98a2 100644
--- a/init/service.cpp
+++ b/init/service.cpp
@@ -36,6 +36,7 @@
 #include <processgroup/processgroup.h>
 #include <selinux/selinux.h>
 
+#include "lmkd_service.h"
 #include "service_list.h"
 #include "util.h"
 
@@ -151,7 +152,7 @@
       seclabel_(seclabel),
       onrestart_(false, subcontext_for_restart_commands, "<Service '" + name + "' onrestart>", 0,
                  "onrestart", {}),
-      oom_score_adjust_(-1000),
+      oom_score_adjust_(DEFAULT_OOM_SCORE_ADJUST),
       start_order_(0),
       args_(args) {}
 
@@ -199,6 +200,10 @@
 
         if (r == 0) process_cgroup_empty_ = true;
     }
+
+    if (oom_score_adjust_ != DEFAULT_OOM_SCORE_ADJUST) {
+        LmkdUnregister(name_, pid_);
+    }
 }
 
 void Service::SetProcessAttributesAndCaps() {
@@ -502,7 +507,7 @@
         return ErrnoError() << "Failed to fork";
     }
 
-    if (oom_score_adjust_ != -1000) {
+    if (oom_score_adjust_ != DEFAULT_OOM_SCORE_ADJUST) {
         std::string oom_str = std::to_string(oom_score_adjust_);
         std::string oom_file = StringPrintf("/proc/%d/oom_score_adj", pid);
         if (!WriteStringToFile(oom_str, oom_file)) {
@@ -563,6 +568,10 @@
         }
     }
 
+    if (oom_score_adjust_ != DEFAULT_OOM_SCORE_ADJUST) {
+        LmkdRegister(name_, proc_attr_.uid, pid_, oom_score_adjust_);
+    }
+
     NotifyStateChange("running");
     reboot_on_failure.Disable();
     return {};
diff --git a/init/service_parser.cpp b/init/service_parser.cpp
index e6a341d..154d1dd 100644
--- a/init/service_parser.cpp
+++ b/init/service_parser.cpp
@@ -29,6 +29,7 @@
 #include <hidl-util/FQName.h>
 #include <system/thread_defs.h>
 
+#include "lmkd_service.h"
 #include "rlimit_parser.h"
 #include "service_utils.h"
 #include "util.h"
@@ -261,8 +262,10 @@
 }
 
 Result<void> ServiceParser::ParseOomScoreAdjust(std::vector<std::string>&& args) {
-    if (!ParseInt(args[1], &service_->oom_score_adjust_, -1000, 1000)) {
-        return Error() << "oom_score_adjust value must be in range -1000 - +1000";
+    if (!ParseInt(args[1], &service_->oom_score_adjust_, MIN_OOM_SCORE_ADJUST,
+                  MAX_OOM_SCORE_ADJUST)) {
+        return Error() << "oom_score_adjust value must be in range " << MIN_OOM_SCORE_ADJUST
+                       << " - +" << MAX_OOM_SCORE_ADJUST;
     }
     return {};
 }
diff --git a/init/service_test.cpp b/init/service_test.cpp
index c9cc7bd..c158b0a 100644
--- a/init/service_test.cpp
+++ b/init/service_test.cpp
@@ -23,6 +23,7 @@
 
 #include <gtest/gtest.h>
 
+#include "lmkd_service.h"
 #include "util.h"
 
 namespace android {
@@ -49,7 +50,7 @@
     EXPECT_EQ(IoSchedClass_NONE, service_in_old_memory->ioprio_class());
     EXPECT_EQ(0, service_in_old_memory->ioprio_pri());
     EXPECT_EQ(0, service_in_old_memory->priority());
-    EXPECT_EQ(-1000, service_in_old_memory->oom_score_adjust());
+    EXPECT_EQ(DEFAULT_OOM_SCORE_ADJUST, service_in_old_memory->oom_score_adjust());
     EXPECT_FALSE(service_in_old_memory->process_cgroup_empty());
 
     for (std::size_t i = 0; i < memory_size; ++i) {
@@ -68,7 +69,7 @@
     EXPECT_EQ(IoSchedClass_NONE, service_in_old_memory2->ioprio_class());
     EXPECT_EQ(0, service_in_old_memory2->ioprio_pri());
     EXPECT_EQ(0, service_in_old_memory2->priority());
-    EXPECT_EQ(-1000, service_in_old_memory2->oom_score_adjust());
+    EXPECT_EQ(DEFAULT_OOM_SCORE_ADJUST, service_in_old_memory2->oom_score_adjust());
     EXPECT_FALSE(service_in_old_memory->process_cgroup_empty());
 }
 
diff --git a/rootdir/init.rc b/rootdir/init.rc
index e037a43..0827247 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -347,6 +347,8 @@
 
     # Start logd before any other services run to ensure we capture all of their logs.
     start logd
+    # Start lmkd before any other services run so that it can register them
+    start lmkd
 
     # Start essential services.
     start servicemanager