diff --git a/fs_mgr/libfiemap/fiemap_writer_test.cpp b/fs_mgr/libfiemap/fiemap_writer_test.cpp
index c37329c..115f53e 100644
--- a/fs_mgr/libfiemap/fiemap_writer_test.cpp
+++ b/fs_mgr/libfiemap/fiemap_writer_test.cpp
@@ -66,7 +66,11 @@
         testfile = gTestDir + "/"s + tinfo->name();
     }
 
-    void TearDown() override { unlink(testfile.c_str()); }
+    void TearDown() override {
+        truncate(testfile.c_str(), 0);
+        unlink(testfile.c_str());
+        sync();
+    }
 
     // name of the file we use for testing
     std::string testfile;
diff --git a/fs_mgr/libfiemap/split_fiemap_writer.cpp b/fs_mgr/libfiemap/split_fiemap_writer.cpp
index 0df6125..1f32d2f 100644
--- a/fs_mgr/libfiemap/split_fiemap_writer.cpp
+++ b/fs_mgr/libfiemap/split_fiemap_writer.cpp
@@ -196,10 +196,13 @@
             if (access(file.c_str(), F_OK) != 0 && (errno == ENOENT || errno == ENAMETOOLONG)) {
                 continue;
             }
+            truncate(file.c_str(), 0);
             ok &= android::base::RemoveFileIfExists(file, message);
         }
     }
+    truncate(file_path.c_str(), 0);
     ok &= android::base::RemoveFileIfExists(file_path, message);
+    sync();
     return ok;
 }
 
diff --git a/fs_mgr/libsnapshot/android/snapshot/snapshot.proto b/fs_mgr/libsnapshot/android/snapshot/snapshot.proto
index 62f9901..5fb71a3 100644
--- a/fs_mgr/libsnapshot/android/snapshot/snapshot.proto
+++ b/fs_mgr/libsnapshot/android/snapshot/snapshot.proto
@@ -233,6 +233,8 @@
     // Number of cow operations to be merged at once
     uint32 cow_op_merge_size = 13;
 
+    // Number of worker threads to serve I/O from dm-user
+    uint32 num_worker_threads = 14;
 }
 
 // Next: 10
diff --git a/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h b/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h
index 7ae55db..8ff41db 100644
--- a/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h
+++ b/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h
@@ -838,6 +838,10 @@
 
     // Get value of maximum cow op merge size
     uint32_t GetUpdateCowOpMergeSize(LockedFile* lock);
+
+    // Get number of threads to perform post OTA boot verification
+    uint32_t GetUpdateWorkerCount(LockedFile* lock);
+
     // Wrapper around libdm, with diagnostics.
     bool DeleteDeviceIfExists(const std::string& name,
                               const std::chrono::milliseconds& timeout_ms = {});
diff --git a/fs_mgr/libsnapshot/snapshot.cpp b/fs_mgr/libsnapshot/snapshot.cpp
index 6c3bedd..05dec68 100644
--- a/fs_mgr/libsnapshot/snapshot.cpp
+++ b/fs_mgr/libsnapshot/snapshot.cpp
@@ -1235,8 +1235,8 @@
                 wrong_phase = true;
                 break;
             default:
-                LOG(ERROR) << "Unknown merge status for \"" << snapshot << "\": "
-                           << "\"" << result.state << "\"";
+                LOG(ERROR) << "Unknown merge status for \"" << snapshot << "\": " << "\""
+                           << result.state << "\"";
                 if (failure_code == MergeFailureCode::Ok) {
                     failure_code = MergeFailureCode::UnexpectedMergeState;
                 }
@@ -1725,6 +1725,10 @@
         if (cow_op_merge_size != 0) {
             snapuserd_argv->emplace_back("-cow_op_merge_size=" + std::to_string(cow_op_merge_size));
         }
+        uint32_t worker_count = GetUpdateWorkerCount(lock.get());
+        if (worker_count != 0) {
+            snapuserd_argv->emplace_back("-worker_count=" + std::to_string(worker_count));
+        }
     }
 
     size_t num_cows = 0;
@@ -2152,6 +2156,11 @@
     return update_status.cow_op_merge_size();
 }
 
+uint32_t SnapshotManager::GetUpdateWorkerCount(LockedFile* lock) {
+    SnapshotUpdateStatus update_status = ReadSnapshotUpdateStatus(lock);
+    return update_status.num_worker_threads();
+}
+
 bool SnapshotManager::MarkSnapuserdFromSystem() {
     auto path = GetSnapuserdFromSystemPath();
 
@@ -3140,6 +3149,7 @@
         status.set_legacy_snapuserd(old_status.legacy_snapuserd());
         status.set_o_direct(old_status.o_direct());
         status.set_cow_op_merge_size(old_status.cow_op_merge_size());
+        status.set_num_worker_threads(old_status.num_worker_threads());
     }
     return WriteSnapshotUpdateStatus(lock, status);
 }
@@ -3524,6 +3534,9 @@
         }
         status.set_cow_op_merge_size(
                 android::base::GetUintProperty<uint32_t>("ro.virtual_ab.cow_op_merge_size", 0));
+        status.set_num_worker_threads(
+                android::base::GetUintProperty<uint32_t>("ro.virtual_ab.num_worker_threads", 0));
+
     } else if (legacy_compression) {
         LOG(INFO) << "Virtual A/B using legacy snapuserd";
     } else {
@@ -3960,6 +3973,7 @@
     ss << "Using io_uring: " << update_status.io_uring_enabled() << std::endl;
     ss << "Using o_direct: " << update_status.o_direct() << std::endl;
     ss << "Cow op merge size (0 for uncapped): " << update_status.cow_op_merge_size() << std::endl;
+    ss << "Worker thread count: " << update_status.num_worker_threads() << std::endl;
     ss << "Using XOR compression: " << GetXorCompressionEnabledProperty() << std::endl;
     ss << "Current slot: " << device_->GetSlotSuffix() << std::endl;
     ss << "Boot indicator: booting from " << GetCurrentSlot() << " slot" << std::endl;
@@ -4576,8 +4590,7 @@
         }
     }
 
-    LOG(ERROR) << "Device-mapper device " << name << "(" << full_path << ")"
-               << " still in use."
+    LOG(ERROR) << "Device-mapper device " << name << "(" << full_path << ")" << " still in use."
                << "  Probably a file descriptor was leaked or held open, or a loop device is"
                << " attached.";
     return false;
diff --git a/fs_mgr/libsnapshot/snapshotctl.cpp b/fs_mgr/libsnapshot/snapshotctl.cpp
index 97a8cb2..46de991 100644
--- a/fs_mgr/libsnapshot/snapshotctl.cpp
+++ b/fs_mgr/libsnapshot/snapshotctl.cpp
@@ -105,7 +105,7 @@
     bool FinishSnapshotWrites();
     bool UnmapCowImagePath(std::string& name);
     bool DeleteSnapshots();
-    bool CleanupSnapshot() { return sm_->PrepareDeviceToBootWithoutSnapshot(); }
+    bool CleanupSnapshot();
     bool BeginUpdate();
     bool ApplyUpdate();
 
@@ -495,6 +495,11 @@
     return sm_->UnmapCowImage(name);
 }
 
+bool MapSnapshots::CleanupSnapshot() {
+    sm_ = SnapshotManager::New();
+    return sm_->PrepareDeviceToBootWithoutSnapshot();
+}
+
 bool MapSnapshots::DeleteSnapshots() {
     sm_ = SnapshotManager::New();
     lock_ = sm_->LockExclusive();
diff --git a/fs_mgr/libsnapshot/snapuserd/snapuserd_daemon.cpp b/fs_mgr/libsnapshot/snapuserd/snapuserd_daemon.cpp
index dd2dd56..32e16cc 100644
--- a/fs_mgr/libsnapshot/snapuserd/snapuserd_daemon.cpp
+++ b/fs_mgr/libsnapshot/snapuserd/snapuserd_daemon.cpp
@@ -31,6 +31,7 @@
 DEFINE_bool(io_uring, false, "If true, io_uring feature is enabled");
 DEFINE_bool(o_direct, false, "If true, enable direct reads on source device");
 DEFINE_int32(cow_op_merge_size, 0, "number of operations to be processed at once");
+DEFINE_int32(worker_count, 4, "number of worker threads used to serve I/O requests to dm-user");
 
 namespace android {
 namespace snapshot {
@@ -114,8 +115,9 @@
             LOG(ERROR) << "Malformed message, expected at least four sub-arguments.";
             return false;
         }
-        auto handler = user_server_.AddHandler(parts[0], parts[1], parts[2], parts[3],
-                                               FLAGS_o_direct, FLAGS_cow_op_merge_size);
+        auto handler =
+                user_server_.AddHandler(parts[0], parts[1], parts[2], parts[3], FLAGS_worker_count,
+                                        FLAGS_o_direct, FLAGS_cow_op_merge_size);
         if (!handler || !user_server_.StartHandler(parts[0])) {
             return false;
         }
diff --git a/fs_mgr/libsnapshot/snapuserd/user-space-merge/snapuserd_server.cpp b/fs_mgr/libsnapshot/snapuserd/user-space-merge/snapuserd_server.cpp
index 013df35..3bb8a30 100644
--- a/fs_mgr/libsnapshot/snapuserd/user-space-merge/snapuserd_server.cpp
+++ b/fs_mgr/libsnapshot/snapuserd/user-space-merge/snapuserd_server.cpp
@@ -35,6 +35,7 @@
 #include <snapuserd/dm_user_block_server.h>
 #include <snapuserd/snapuserd_client.h>
 #include "snapuserd_server.h"
+#include "user-space-merge/snapuserd_core.h"
 
 namespace android {
 namespace snapshot {
@@ -125,7 +126,7 @@
             return Sendmsg(fd, "fail");
         }
 
-        auto handler = AddHandler(out[1], out[2], out[3], out[4]);
+        auto handler = AddHandler(out[1], out[2], out[3], out[4], std::nullopt);
         if (!handler) {
             return Sendmsg(fd, "fail");
         }
@@ -341,12 +342,11 @@
     SetTerminating();
 }
 
-std::shared_ptr<HandlerThread> UserSnapshotServer::AddHandler(const std::string& misc_name,
-                                                              const std::string& cow_device_path,
-                                                              const std::string& backing_device,
-                                                              const std::string& base_path_merge,
-                                                              const bool o_direct,
-                                                              uint32_t cow_op_merge_size) {
+std::shared_ptr<HandlerThread> UserSnapshotServer::AddHandler(
+        const std::string& misc_name, const std::string& cow_device_path,
+        const std::string& backing_device, const std::string& base_path_merge,
+        std::optional<uint32_t> num_worker_threads, const bool o_direct,
+        uint32_t cow_op_merge_size) {
     // We will need multiple worker threads only during
     // device boot after OTA. For all other purposes,
     // one thread is sufficient. We don't want to consume
@@ -355,7 +355,9 @@
     //
     // During boot up, we need multiple threads primarily for
     // update-verification.
-    int num_worker_threads = kNumWorkerThreads;
+    if (!num_worker_threads.has_value()) {
+        num_worker_threads = kNumWorkerThreads;
+    }
     if (is_socket_present_) {
         num_worker_threads = 1;
     }
@@ -368,7 +370,7 @@
     auto opener = block_server_factory_->CreateOpener(misc_name);
 
     return handlers_->AddHandler(misc_name, cow_device_path, backing_device, base_path_merge,
-                                 opener, num_worker_threads, io_uring_enabled_, o_direct,
+                                 opener, num_worker_threads.value(), io_uring_enabled_, o_direct,
                                  cow_op_merge_size);
 }
 
diff --git a/fs_mgr/libsnapshot/snapuserd/user-space-merge/snapuserd_server.h b/fs_mgr/libsnapshot/snapuserd/user-space-merge/snapuserd_server.h
index ceea36a..f002e8d 100644
--- a/fs_mgr/libsnapshot/snapuserd/user-space-merge/snapuserd_server.h
+++ b/fs_mgr/libsnapshot/snapuserd/user-space-merge/snapuserd_server.h
@@ -87,6 +87,7 @@
                                               const std::string& cow_device_path,
                                               const std::string& backing_device,
                                               const std::string& base_path_merge,
+                                              std::optional<uint32_t> num_worker_threads,
                                               bool o_direct = false,
                                               uint32_t cow_op_merge_size = 0);
     bool StartHandler(const std::string& misc_name);
diff --git a/init/epoll.cpp b/init/epoll.cpp
index cd73a0c..719a532 100644
--- a/init/epoll.cpp
+++ b/init/epoll.cpp
@@ -47,8 +47,8 @@
 
     auto [it, inserted] = epoll_handlers_.emplace(
             fd, Info{
-                        .events = events,
                         .handler = std::move(handler),
+                        .events = events,
                 });
     if (!inserted) {
         return Error() << "Cannot specify two epoll handlers for a given FD";
diff --git a/init/first_stage_mount.cpp b/init/first_stage_mount.cpp
index ece430b..99bf0de 100644
--- a/init/first_stage_mount.cpp
+++ b/init/first_stage_mount.cpp
@@ -305,11 +305,6 @@
             return false;
         }
     }
-
-    if (IsArcvm() && !block_dev_init_.InitHvcDevice("hvc1")) {
-        return false;
-    }
-
     return true;
 }
 
diff --git a/init/selinux.cpp b/init/selinux.cpp
index 01af2b6..c2d9b8d 100644
--- a/init/selinux.cpp
+++ b/init/selinux.cpp
@@ -474,8 +474,6 @@
     RestoreconIfExists(SnapshotManager::GetGlobalRollbackIndicatorPath().c_str(), 0);
     RestoreconIfExists("/metadata/gsi",
                        SELINUX_ANDROID_RESTORECON_RECURSE | SELINUX_ANDROID_RESTORECON_SKIP_SEHASH);
-
-    RestoreconIfExists("/dev/hvc1", 0);
 }
 
 int SelinuxKlogCallback(int type, const char* fmt, ...) {
diff --git a/init/util.h b/init/util.h
index 0565391..aa24123 100644
--- a/init/util.h
+++ b/init/util.h
@@ -18,7 +18,6 @@
 
 #include <sys/stat.h>
 #include <sys/types.h>
-#include <sys/unistd.h>
 
 #include <chrono>
 #include <functional>
@@ -109,10 +108,6 @@
 #endif
 }
 
-inline bool IsArcvm() {
-    return !access("/is_arcvm", F_OK);
-}
-
 bool Has32BitAbi();
 
 std::string GetApexNameFromFileName(const std::string& path);
diff --git a/libcutils/sched_policy_test.cpp b/libcutils/sched_policy_test.cpp
index 50bd6d0..2641743 100644
--- a/libcutils/sched_policy_test.cpp
+++ b/libcutils/sched_policy_test.cpp
@@ -67,13 +67,6 @@
 }
 
 TEST(SchedPolicy, set_sched_policy) {
-    if (!schedboost_enabled()) {
-        // schedboost_enabled() (i.e. CONFIG_CGROUP_SCHEDTUNE) is optional;
-        // it's only needed on devices using energy-aware scheduler.
-        GTEST_LOG_(INFO) << "skipping test that requires CONFIG_CGROUP_SCHEDTUNE";
-        return;
-    }
-
     ASSERT_EQ(0, set_sched_policy(0, SP_BACKGROUND));
     ASSERT_EQ(0, set_cpuset_policy(0, SP_BACKGROUND));
     AssertPolicy(SP_BACKGROUND);
diff --git a/libprocessgroup/include/processgroup/sched_policy.h b/libprocessgroup/include/processgroup/sched_policy.h
index 1b6ea66..92cd367 100644
--- a/libprocessgroup/include/processgroup/sched_policy.h
+++ b/libprocessgroup/include/processgroup/sched_policy.h
@@ -29,14 +29,6 @@
  */
 extern bool cpusets_enabled();
 
-/*
- * Check if Linux kernel enables SCHEDTUNE feature (only available in Android
- * common kernel or Linaro LSK, not in mainline Linux as of v4.9)
- *
- * Return value: 1 if Linux kernel CONFIG_CGROUP_SCHEDTUNE=y; 0 otherwise.
- */
-extern bool schedboost_enabled();
-
 /* Keep in sync with THREAD_GROUP_* in frameworks/base/core/java/android/os/Process.java */
 typedef enum {
     SP_DEFAULT = -1,
diff --git a/libprocessgroup/profiles/Android.bp b/libprocessgroup/profiles/Android.bp
index 885971a..1ec9f7f 100644
--- a/libprocessgroup/profiles/Android.bp
+++ b/libprocessgroup/profiles/Android.bp
@@ -19,11 +19,6 @@
 prebuilt_etc {
     name: "cgroups.json",
     src: "cgroups.json",
-    required: [
-        "cgroups_28.json",
-        "cgroups_29.json",
-        "cgroups_30.json",
-    ],
 }
 
 prebuilt_etc {
@@ -34,49 +29,8 @@
 }
 
 prebuilt_etc {
-    name: "cgroups_28.json",
-    src: "cgroups_28.json",
-    sub_dir: "task_profiles",
-}
-
-prebuilt_etc {
-    name: "cgroups_29.json",
-    src: "cgroups_29.json",
-    sub_dir: "task_profiles",
-}
-
-prebuilt_etc {
-    name: "cgroups_30.json",
-    src: "cgroups_30.json",
-    sub_dir: "task_profiles",
-}
-
-prebuilt_etc {
     name: "task_profiles.json",
     src: "task_profiles.json",
-    required: [
-        "task_profiles_28.json",
-        "task_profiles_29.json",
-        "task_profiles_30.json",
-    ],
-}
-
-prebuilt_etc {
-    name: "task_profiles_28.json",
-    src: "task_profiles_28.json",
-    sub_dir: "task_profiles",
-}
-
-prebuilt_etc {
-    name: "task_profiles_29.json",
-    src: "task_profiles_29.json",
-    sub_dir: "task_profiles",
-}
-
-prebuilt_etc {
-    name: "task_profiles_30.json",
-    src: "task_profiles_30.json",
-    sub_dir: "task_profiles",
 }
 
 cc_defaults {
diff --git a/libprocessgroup/profiles/cgroups_28.json b/libprocessgroup/profiles/cgroups_28.json
deleted file mode 100644
index 17d4929..0000000
--- a/libprocessgroup/profiles/cgroups_28.json
+++ /dev/null
@@ -1,11 +0,0 @@
-{
-  "Cgroups": [
-    {
-      "Controller": "schedtune",
-      "Path": "/dev/stune",
-      "Mode": "0755",
-      "UID": "system",
-      "GID": "system"
-    }
-  ]
-}
diff --git a/libprocessgroup/profiles/cgroups_29.json b/libprocessgroup/profiles/cgroups_29.json
deleted file mode 100644
index 17d4929..0000000
--- a/libprocessgroup/profiles/cgroups_29.json
+++ /dev/null
@@ -1,11 +0,0 @@
-{
-  "Cgroups": [
-    {
-      "Controller": "schedtune",
-      "Path": "/dev/stune",
-      "Mode": "0755",
-      "UID": "system",
-      "GID": "system"
-    }
-  ]
-}
diff --git a/libprocessgroup/profiles/cgroups_30.json b/libprocessgroup/profiles/cgroups_30.json
deleted file mode 100644
index 80a074b..0000000
--- a/libprocessgroup/profiles/cgroups_30.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-  "Cgroups": [
-    {
-      "Controller": "schedtune",
-      "Path": "/dev/stune",
-      "Mode": "0755",
-      "UID": "system",
-      "GID": "system",
-      "Optional": true
-    }
-  ]
-}
diff --git a/libprocessgroup/profiles/task_profiles_28.json b/libprocessgroup/profiles/task_profiles_28.json
deleted file mode 100644
index e7be548..0000000
--- a/libprocessgroup/profiles/task_profiles_28.json
+++ /dev/null
@@ -1,160 +0,0 @@
-{
-  "Attributes": [
-    {
-      "Name": "STuneBoost",
-      "Controller": "schedtune",
-      "File": "schedtune.boost"
-    },
-    {
-      "Name": "STunePreferIdle",
-      "Controller": "schedtune",
-      "File": "schedtune.prefer_idle"
-    }
-  ],
-
-  "Profiles": [
-    {
-      "Name": "HighEnergySaving",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "background"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "NormalPerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": ""
-          }
-        }
-      ]
-    },
-    {
-      "Name": "ServicePerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "background"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "HighPerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "foreground"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "MaxPerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "top-app"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "RealtimePerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "rt"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "CameraServicePerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "camera-daemon"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "NNApiHALPerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "nnapi-hal"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "Dex2oatPerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "background"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "CpuPolicySpread",
-      "Actions": [
-        {
-          "Name": "SetAttribute",
-          "Params":
-          {
-            "Name": "STunePreferIdle",
-            "Value": "1"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "CpuPolicyPack",
-      "Actions": [
-        {
-          "Name": "SetAttribute",
-          "Params":
-          {
-            "Name": "STunePreferIdle",
-            "Value": "0"
-          }
-        }
-      ]
-    }
-  ]
-}
diff --git a/libprocessgroup/profiles/task_profiles_29.json b/libprocessgroup/profiles/task_profiles_29.json
deleted file mode 100644
index 6174c8d..0000000
--- a/libprocessgroup/profiles/task_profiles_29.json
+++ /dev/null
@@ -1,160 +0,0 @@
-{
-  "Attributes": [
-    {
-      "Name": "STuneBoost",
-      "Controller": "schedtune",
-      "File": "schedtune.boost"
-    },
-    {
-      "Name": "STunePreferIdle",
-      "Controller": "schedtune",
-      "File": "schedtune.prefer_idle"
-    }
-  ],
-
-  "Profiles": [
-    {
-      "Name": "HighEnergySaving",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "background"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "NormalPerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": ""
-          }
-        }
-      ]
-    },
-    {
-      "Name": "HighPerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "foreground"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "ServicePerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "background"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "MaxPerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "top-app"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "RealtimePerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "rt"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "CameraServicePerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "camera-daemon"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "NNApiHALPerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "nnapi-hal"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "Dex2oatPerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "background"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "CpuPolicySpread",
-      "Actions": [
-        {
-          "Name": "SetAttribute",
-          "Params":
-          {
-            "Name": "STunePreferIdle",
-            "Value": "1"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "CpuPolicyPack",
-      "Actions": [
-        {
-          "Name": "SetAttribute",
-          "Params":
-          {
-            "Name": "STunePreferIdle",
-            "Value": "0"
-          }
-        }
-      ]
-    }
-  ]
-}
diff --git a/libprocessgroup/profiles/task_profiles_30.json b/libprocessgroup/profiles/task_profiles_30.json
deleted file mode 100644
index e7be548..0000000
--- a/libprocessgroup/profiles/task_profiles_30.json
+++ /dev/null
@@ -1,160 +0,0 @@
-{
-  "Attributes": [
-    {
-      "Name": "STuneBoost",
-      "Controller": "schedtune",
-      "File": "schedtune.boost"
-    },
-    {
-      "Name": "STunePreferIdle",
-      "Controller": "schedtune",
-      "File": "schedtune.prefer_idle"
-    }
-  ],
-
-  "Profiles": [
-    {
-      "Name": "HighEnergySaving",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "background"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "NormalPerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": ""
-          }
-        }
-      ]
-    },
-    {
-      "Name": "ServicePerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "background"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "HighPerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "foreground"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "MaxPerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "top-app"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "RealtimePerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "rt"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "CameraServicePerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "camera-daemon"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "NNApiHALPerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "nnapi-hal"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "Dex2oatPerformance",
-      "Actions": [
-        {
-          "Name": "JoinCgroup",
-          "Params":
-          {
-            "Controller": "schedtune",
-            "Path": "background"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "CpuPolicySpread",
-      "Actions": [
-        {
-          "Name": "SetAttribute",
-          "Params":
-          {
-            "Name": "STunePreferIdle",
-            "Value": "1"
-          }
-        }
-      ]
-    },
-    {
-      "Name": "CpuPolicyPack",
-      "Actions": [
-        {
-          "Name": "SetAttribute",
-          "Params":
-          {
-            "Name": "STunePreferIdle",
-            "Value": "0"
-          }
-        }
-      ]
-    }
-  ]
-}
diff --git a/libprocessgroup/sched_policy.cpp b/libprocessgroup/sched_policy.cpp
index 042bcd2..5a53c35 100644
--- a/libprocessgroup/sched_policy.cpp
+++ b/libprocessgroup/sched_policy.cpp
@@ -148,20 +148,10 @@
     return enabled;
 }
 
-static bool schedtune_enabled() {
-    return (CgroupMap::GetInstance().FindController("schedtune").IsUsable());
-}
-
 static bool cpuctl_enabled() {
     return (CgroupMap::GetInstance().FindController("cpu").IsUsable());
 }
 
-bool schedboost_enabled() {
-    static bool enabled = schedtune_enabled() || cpuctl_enabled();
-
-    return enabled;
-}
-
 static int getCGroupSubsys(pid_t tid, const char* subsys, std::string& subgroup) {
     auto controller = CgroupMap::GetInstance().FindController(subsys);
 
@@ -201,9 +191,8 @@
     }
 
     std::string group;
-    if (schedboost_enabled()) {
-        if ((getCGroupSubsys(tid, "schedtune", group) < 0) &&
-            (getCGroupSubsys(tid, "cpu", group) < 0)) {
+    if (cpuctl_enabled()) {
+        if (getCGroupSubsys(tid, "cpu", group) < 0) {
             LOG(ERROR) << "Failed to find cpu cgroup for tid " << tid;
             return -1;
         }
diff --git a/libprocessgroup/task_profiles.cpp b/libprocessgroup/task_profiles.cpp
index 67ecc1d..bdee9ae 100644
--- a/libprocessgroup/task_profiles.cpp
+++ b/libprocessgroup/task_profiles.cpp
@@ -203,33 +203,15 @@
 // To avoid issues in sdk_mac build
 #if defined(__ANDROID__)
 
-bool SetTimerSlackAction::IsTimerSlackSupported(pid_t tid) {
-    auto file = StringPrintf("/proc/%d/timerslack_ns", tid);
-
-    return (access(file.c_str(), W_OK) == 0);
-}
-
 bool SetTimerSlackAction::ExecuteForTask(pid_t tid) const {
-    static bool sys_supports_timerslack = IsTimerSlackSupported(tid);
-
-    // v4.6+ kernels support the /proc/<tid>/timerslack_ns interface.
-    // TODO: once we've backported this, log if the open(2) fails.
-    if (sys_supports_timerslack) {
-        auto file = StringPrintf("/proc/%d/timerslack_ns", tid);
-        if (!WriteStringToFile(std::to_string(slack_), file)) {
-            if (errno == ENOENT) {
-                // This happens when process is already dead
-                return true;
-            }
-            PLOG(ERROR) << "set_timerslack_ns write failed";
+    const auto file = StringPrintf("/proc/%d/timerslack_ns", tid);
+    if (!WriteStringToFile(std::to_string(slack_), file)) {
+        if (errno == ENOENT) {
+            // This happens when process is already dead
+            return true;
         }
-    }
-
-    // TODO: Remove when /proc/<tid>/timerslack_ns interface is backported.
-    if (tid == 0 || tid == GetThreadId()) {
-        if (prctl(PR_SET_TIMERSLACK, slack_) == -1) {
-            PLOG(ERROR) << "set_timerslack_ns prctl failed";
-        }
+        PLOG(ERROR) << "set_timerslack_ns write failed";
+        return false;
     }
 
     return true;
diff --git a/libprocessgroup/task_profiles.h b/libprocessgroup/task_profiles.h
index abb3ca5..2e31158 100644
--- a/libprocessgroup/task_profiles.h
+++ b/libprocessgroup/task_profiles.h
@@ -114,8 +114,6 @@
 
   private:
     unsigned long slack_;
-
-    static bool IsTimerSlackSupported(pid_t tid);
 };
 
 // Set attribute profile element
diff --git a/libstats/pull_lazy/Android.bp b/libstats/pull_lazy/Android.bp
index 65dce26..71af170 100644
--- a/libstats/pull_lazy/Android.bp
+++ b/libstats/pull_lazy/Android.bp
@@ -32,7 +32,7 @@
         "-Wall",
         "-Werror",
     ],
-    test_suites: ["device-tests", "mts-statsd"],
+    test_suites: ["device-tests"],
     test_config: "libstatspull_lazy_test.xml",
     // TODO(b/153588990): Remove when the build system properly separates.
     // 32bit and 64bit architectures.
diff --git a/libstats/socket_lazy/Android.bp b/libstats/socket_lazy/Android.bp
index 241e87a..945a7c4 100644
--- a/libstats/socket_lazy/Android.bp
+++ b/libstats/socket_lazy/Android.bp
@@ -36,7 +36,6 @@
     ],
     test_suites: [
         "device-tests",
-        "mts-statsd",
     ],
     test_config: "libstatssocket_lazy_test.xml",
     // TODO(b/153588990): Remove when the build system properly separates.
diff --git a/libutils/binder/VectorImpl.cpp b/libutils/binder/VectorImpl.cpp
index d951b8b..a62664f 100644
--- a/libutils/binder/VectorImpl.cpp
+++ b/libutils/binder/VectorImpl.cpp
@@ -463,7 +463,8 @@
     size_t new_size;
     LOG_ALWAYS_FATAL_IF(__builtin_sub_overflow(mCount, amount, &new_size));
 
-    if (new_size < (capacity() / 2)) {
+    const size_t prev_capacity = capacity();
+    if (new_size < (prev_capacity / 2) && prev_capacity > kMinVectorCapacity) {
         // NOTE: (new_size * 2) is safe because capacity didn't overflow and
         // new_size < (capacity / 2)).
         const size_t new_capacity = max(kMinVectorCapacity, new_size * 2);
diff --git a/libvendorsupport/include_llndk/android/llndk-versioning.h b/libvendorsupport/include_llndk/android/llndk-versioning.h
index 0402c28..81d165f 100644
--- a/libvendorsupport/include_llndk/android/llndk-versioning.h
+++ b/libvendorsupport/include_llndk/android/llndk-versioning.h
@@ -25,15 +25,15 @@
     __attribute__((annotate("introduced_in_llndk=" #vendor_api_level)))
 #endif
 
-#if defined(__ANDROID_VNDK__)
-
+#if defined(__ANDROID_VENDOR_API__)
+// __ANDROID_VENDOR_API__ is defined only for vendor or product variant modules.
 // Use this macro as an `if` statement to call an API that are available to both NDK and LLNDK.
-// This returns true for the vendor modules if the vendor_api_level is less than or equal to the
-// ro.board.api_level.
+// This returns true for vendor or product modules if the vendor_api_level is less than or equal to
+// the ro.board.api_level.
 #define API_LEVEL_AT_LEAST(sdk_api_level, vendor_api_level) \
     constexpr(__ANDROID_VENDOR_API__ >= vendor_api_level)
 
-#else  // __ANDROID_VNDK__
+#else  // __ANDROID_VENDOR_API__
 
 // For non-vendor modules, API_LEVEL_AT_LEAST is replaced with __builtin_available(sdk_api_level) to
 // guard the API for __INTRODUCED_IN.
@@ -42,4 +42,4 @@
     (__builtin_available(android sdk_api_level, *))
 #endif
 
-#endif  // __ANDROID_VNDK__
+#endif  // __ANDROID_VENDOR_API__
diff --git a/rootdir/init.rc b/rootdir/init.rc
index c8b725d..3e1d481 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -1194,6 +1194,9 @@
     chown system system /sys/kernel/ipv4/tcp_rmem_min
     chown system system /sys/kernel/ipv4/tcp_rmem_def
     chown system system /sys/kernel/ipv4/tcp_rmem_max
+    chown system system /sys/firmware/acpi/tables
+    chown system system /sys/firmware/acpi/tables/BERT
+    chown system system /sys/firmware/acpi/tables/data/BERT
     chown root radio /proc/cmdline
     chown root system /proc/bootconfig
 
diff --git a/trusty/libtrusty/tipc-test/tipc_test.c b/trusty/libtrusty/tipc-test/tipc_test.c
index 3cf0c05..121837d 100644
--- a/trusty/libtrusty/tipc-test/tipc_test.c
+++ b/trusty/libtrusty/tipc-test/tipc_test.c
@@ -67,7 +67,7 @@
 static const char* receiver_name = "com.android.trusty.memref.receiver";
 static const size_t memref_chunk_size = 4096;
 
-static const char* _sopts = "hsvDS:t:r:m:b:B:";
+static const char* _sopts = "hsvD:S:t:r:m:b:B:";
 /* clang-format off */
 static const struct option _lopts[] =  {
     {"help",    no_argument,       0, 'h'},
diff --git a/trusty/utils/trusty-ut-ctrl/ut-ctrl.c b/trusty/utils/trusty-ut-ctrl/ut-ctrl.c
index 6cc6670..31cfd4c 100644
--- a/trusty/utils/trusty-ut-ctrl/ut-ctrl.c
+++ b/trusty/utils/trusty-ut-ctrl/ut-ctrl.c
@@ -95,12 +95,26 @@
     TEST_FAILED = 1,
     TEST_MESSAGE = 2,
     TEST_TEXT = 3,
+    TEST_OPCODE_COUNT,
 };
 
+static int get_msg_len(const char* buf, int max_buf_len) {
+    int buf_len;
+    for (buf_len = 0; buf_len < max_buf_len; buf_len++) {
+        if ((unsigned char)buf[buf_len] < TEST_OPCODE_COUNT) {
+            break;
+        }
+    }
+    return buf_len;
+}
+
 static int run_trusty_unitest(const char* utapp) {
     int fd;
-    int rc;
-    char rx_buf[1024];
+    char read_buf[1024];
+    int read_len;
+    char* rx_buf;
+    int rx_buf_len;
+    int cmd = -1;
 
     /* connect to unitest app */
     fd = tipc_connect(dev_name, utapp);
@@ -110,22 +124,39 @@
     }
 
     /* wait for test to complete */
+    rx_buf_len = 0;
     for (;;) {
-        rc = read(fd, rx_buf, sizeof(rx_buf));
-        if (rc <= 0 || rc >= (int)sizeof(rx_buf)) {
-            fprintf(stderr, "%s: Read failed: %d\n", __func__, rc);
-            tipc_close(fd);
-            return -1;
+        if (rx_buf_len == 0) {
+            read_len = read(fd, read_buf, sizeof(read_buf));
+            if (read_len <= 0 || read_len > (int)sizeof(read_buf)) {
+                fprintf(stderr, "%s: Read failed: %d, %s\n", __func__, read_len,
+                        read_len < 0 ? strerror(errno) : "");
+                tipc_close(fd);
+                return -1;
+            }
+            rx_buf = read_buf;
+            rx_buf_len = read_len;
         }
 
-        if (rx_buf[0] == TEST_PASSED) {
+        int msg_len = get_msg_len(rx_buf, rx_buf_len);
+        if (msg_len == 0) {
+            cmd = rx_buf[0];
+            rx_buf++;
+            rx_buf_len--;
+        }
+
+        if (cmd == TEST_PASSED) {
             break;
-        } else if (rx_buf[0] == TEST_FAILED) {
+        } else if (cmd == TEST_FAILED) {
             break;
-        } else if (rx_buf[0] == TEST_MESSAGE || rx_buf[0] == TEST_TEXT) {
-            write(STDOUT_FILENO, rx_buf + 1, rc - 1);
+        } else if (cmd == TEST_MESSAGE || cmd == TEST_TEXT) {
+            if (msg_len) {
+                write(STDOUT_FILENO, rx_buf, msg_len);
+                rx_buf += msg_len;
+                rx_buf_len -= msg_len;
+            }
         } else {
-            fprintf(stderr, "%s: Bad message header: %d\n", __func__, rx_buf[0]);
+            fprintf(stderr, "%s: Bad message header: %d\n", __func__, cmd);
             break;
         }
     }
@@ -133,7 +164,7 @@
     /* close connection to unitest app */
     tipc_close(fd);
 
-    return rx_buf[0] == TEST_PASSED ? 0 : -1;
+    return cmd == TEST_PASSED ? 0 : -1;
 }
 
 int main(int argc, char** argv) {