diff --git a/fs_mgr/libsnapshot/snapshot.cpp b/fs_mgr/libsnapshot/snapshot.cpp
index a83f535..019b64a 100644
--- a/fs_mgr/libsnapshot/snapshot.cpp
+++ b/fs_mgr/libsnapshot/snapshot.cpp
@@ -3273,8 +3273,21 @@
                 snapuserd_client_ = nullptr;
             }
         } else {
-            status.set_userspace_snapshots(!IsDmSnapshotTestingEnabled());
-            if (IsDmSnapshotTestingEnabled()) {
+            bool userSnapshotsEnabled = true;
+            const std::string UNKNOWN = "unknown";
+            const std::string vendor_release = android::base::GetProperty(
+                    "ro.vendor.build.version.release_or_codename", UNKNOWN);
+
+            // No user-space snapshots if vendor partition is on Android 12
+            if (vendor_release.find("12") != std::string::npos) {
+                LOG(INFO) << "Userspace snapshots disabled as vendor partition is on Android: "
+                          << vendor_release;
+                userSnapshotsEnabled = false;
+            }
+
+            userSnapshotsEnabled = (userSnapshotsEnabled && !IsDmSnapshotTestingEnabled());
+            status.set_userspace_snapshots(userSnapshotsEnabled);
+            if (!userSnapshotsEnabled) {
                 is_snapshot_userspace_ = false;
                 LOG(INFO) << "User-space snapshots disabled for testing";
             } else {
diff --git a/fs_mgr/libsnapshot/snapshot_test.cpp b/fs_mgr/libsnapshot/snapshot_test.cpp
index 36abf71..c145da7 100644
--- a/fs_mgr/libsnapshot/snapshot_test.cpp
+++ b/fs_mgr/libsnapshot/snapshot_test.cpp
@@ -91,7 +91,7 @@
 
 void MountMetadata();
 bool ShouldUseCompression();
-bool ShouldUseUserspaceSnapshots();
+bool IsDaemonRequired();
 
 class SnapshotTest : public ::testing::Test {
   public:
@@ -1208,7 +1208,7 @@
 
     // Initiate the merge and wait for it to be completed.
     ASSERT_TRUE(init->InitiateMerge());
-    ASSERT_EQ(init->IsSnapuserdRequired(), ShouldUseUserspaceSnapshots());
+    ASSERT_EQ(init->IsSnapuserdRequired(), IsDaemonRequired());
     {
         // We should have started in SECOND_PHASE since nothing shrinks.
         ASSERT_TRUE(AcquireLock());
@@ -1342,7 +1342,7 @@
 
     // Initiate the merge and wait for it to be completed.
     ASSERT_TRUE(init->InitiateMerge());
-    ASSERT_EQ(init->IsSnapuserdRequired(), ShouldUseUserspaceSnapshots());
+    ASSERT_EQ(init->IsSnapuserdRequired(), IsDaemonRequired());
     {
         // Check that the merge phase is FIRST_PHASE until at least one call
         // to ProcessUpdateState() occurs.
@@ -1450,7 +1450,7 @@
 
     // Initiate the merge and wait for it to be completed.
     ASSERT_TRUE(init->InitiateMerge());
-    ASSERT_EQ(init->IsSnapuserdRequired(), ShouldUseUserspaceSnapshots());
+    ASSERT_EQ(init->IsSnapuserdRequired(), IsDaemonRequired());
     {
         // Check that the merge phase is FIRST_PHASE until at least one call
         // to ProcessUpdateState() occurs.
@@ -2750,13 +2750,30 @@
     }
 }
 
-bool ShouldUseUserspaceSnapshots() {
+bool IsDaemonRequired() {
     if (FLAGS_force_config == "dmsnap") {
         return false;
     }
+
+    if (!IsCompressionEnabled()) {
+        return false;
+    }
+
+    const std::string UNKNOWN = "unknown";
+    const std::string vendor_release =
+            android::base::GetProperty("ro.vendor.build.version.release_or_codename", UNKNOWN);
+
+    // No userspace snapshots if vendor partition is on Android 12
+    // However, for GRF devices, snapuserd daemon will be on
+    // vendor ramdisk in Android 12.
+    if (vendor_release.find("12") != std::string::npos) {
+        return true;
+    }
+
     if (!FLAGS_force_config.empty()) {
         return true;
     }
+
     return IsUserspaceSnapshotsEnabled();
 }
 
diff --git a/fs_mgr/libsnapshot/vts_ota_config_test.cpp b/fs_mgr/libsnapshot/vts_ota_config_test.cpp
index afc2d81..02bcc34 100644
--- a/fs_mgr/libsnapshot/vts_ota_config_test.cpp
+++ b/fs_mgr/libsnapshot/vts_ota_config_test.cpp
@@ -17,7 +17,14 @@
 #include <android-base/properties.h>
 #include <gtest/gtest.h>
 
+static int GetVsrLevel() {
+    return android::base::GetIntProperty("ro.vendor.api_level", -1);
+}
+
 TEST(VAB, Enabled) {
     ASSERT_TRUE(android::base::GetBoolProperty("ro.virtual_ab.enabled", false));
+    if (GetVsrLevel() < __ANDROID_API_T__) {
+        GTEST_SKIP();
+    }
     ASSERT_TRUE(android::base::GetBoolProperty("ro.virtual_ab.userspace.snapshots.enabled", false));
 }
diff --git a/fs_mgr/tests/vts_fs_test.cpp b/fs_mgr/tests/vts_fs_test.cpp
index aac2cfd..ae8e459 100644
--- a/fs_mgr/tests/vts_fs_test.cpp
+++ b/fs_mgr/tests/vts_fs_test.cpp
@@ -28,8 +28,8 @@
 }
 
 TEST(fs, ErofsSupported) {
-    // S and higher for this test.
-    if (GetVsrLevel() < __ANDROID_API_S__) {
+    // T-launch GKI kernels and higher must support EROFS.
+    if (GetVsrLevel() < __ANDROID_API_T__) {
         GTEST_SKIP();
     }
 
diff --git a/libcutils/trace-container.cpp b/libcutils/trace-container.cpp
index 8901e4a..6202662 100644
--- a/libcutils/trace-container.cpp
+++ b/libcutils/trace-container.cpp
@@ -231,24 +231,24 @@
 
 void atrace_async_for_track_begin_body(const char* track_name, const char* name, int32_t cookie) {
     if (CC_LIKELY(atrace_use_container_sock)) {
-        WRITE_MSG_IN_CONTAINER("T", "|", "|%d", track_name, name, cookie);
+        WRITE_MSG_IN_CONTAINER("G", "|", "|%d", track_name, name, cookie);
         return;
     }
 
     if (atrace_marker_fd < 0) return;
 
-    WRITE_MSG("T|%d|", "|%" PRId32, track_name, name, cookie);
+    WRITE_MSG("G|%d|", "|%" PRId32, track_name, name, cookie);
 }
 
 void atrace_async_for_track_end_body(const char* track_name, const char* name, int32_t cookie) {
     if (CC_LIKELY(atrace_use_container_sock)) {
-        WRITE_MSG_IN_CONTAINER("U", "|", "|%d", track_name, name, cookie);
+        WRITE_MSG_IN_CONTAINER("H", "|", "|%d", track_name, name, cookie);
         return;
     }
 
     if (atrace_marker_fd < 0) return;
 
-    WRITE_MSG("U|%d|", "|%" PRId32, track_name, name, cookie);
+    WRITE_MSG("H|%d|", "|%" PRId32, track_name, name, cookie);
 }
 
 void atrace_instant_body(const char* name) {
diff --git a/libcutils/trace-dev.cpp b/libcutils/trace-dev.cpp
index eacc8ee..e9583fb 100644
--- a/libcutils/trace-dev.cpp
+++ b/libcutils/trace-dev.cpp
@@ -90,11 +90,11 @@
 }
 
 void atrace_async_for_track_begin_body(const char* track_name, const char* name, int32_t cookie) {
-    WRITE_MSG("T|%d|", "|%" PRId32, track_name, name, cookie);
+    WRITE_MSG("G|%d|", "|%" PRId32, track_name, name, cookie);
 }
 
 void atrace_async_for_track_end_body(const char* track_name, const char* name, int32_t cookie) {
-    WRITE_MSG("U|%d|", "|%" PRId32, track_name, name, cookie);
+    WRITE_MSG("H|%d|", "|%" PRId32, track_name, name, cookie);
 }
 
 void atrace_instant_body(const char* name) {
diff --git a/libcutils/trace-dev_test.cpp b/libcutils/trace-dev_test.cpp
index 841674a..d4a907d 100644
--- a/libcutils/trace-dev_test.cpp
+++ b/libcutils/trace-dev_test.cpp
@@ -202,13 +202,13 @@
 
     std::string actual;
     ASSERT_TRUE(android::base::ReadFdToString(atrace_marker_fd, &actual));
-    std::string expected = android::base::StringPrintf("T|%d|fake_track|fake_name|12345", getpid());
+    std::string expected = android::base::StringPrintf("G|%d|fake_track|fake_name|12345", getpid());
     ASSERT_STREQ(expected.c_str(), actual.c_str());
 }
 
 TEST_F(TraceDevTest, atrace_async_for_track_begin_body_exact_track_name) {
     const int name_size = 5;
-    std::string expected = android::base::StringPrintf("T|%d|", getpid());
+    std::string expected = android::base::StringPrintf("G|%d|", getpid());
     std::string track_name =
             MakeName(ATRACE_MESSAGE_LENGTH - expected.length() - 1 - name_size - 6);
     atrace_async_for_track_begin_body(track_name.c_str(), "name", 12345);
@@ -224,7 +224,7 @@
     // Add a single character and verify name truncation
     ASSERT_EQ(0, lseek(atrace_marker_fd, 0, SEEK_SET));
     track_name += '*';
-    expected = android::base::StringPrintf("T|%d|", getpid());
+    expected = android::base::StringPrintf("G|%d|", getpid());
     expected += track_name + "|nam|12345";
     atrace_async_for_track_begin_body(track_name.c_str(), "name", 12345);
     EXPECT_EQ(ATRACE_MESSAGE_LENGTH - 1, lseek(atrace_marker_fd, 0, SEEK_CUR));
@@ -234,7 +234,7 @@
 }
 
 TEST_F(TraceDevTest, atrace_async_for_track_begin_body_truncated_track_name) {
-    std::string expected = android::base::StringPrintf("T|%d|", getpid());
+    std::string expected = android::base::StringPrintf("G|%d|", getpid());
     std::string track_name = MakeName(2 * ATRACE_MESSAGE_LENGTH);
     atrace_async_for_track_begin_body(track_name.c_str(), "name", 12345);
 
@@ -250,7 +250,7 @@
 
 TEST_F(TraceDevTest, atrace_async_for_track_begin_body_exact_name) {
     const int track_name_size = 11;
-    std::string expected = android::base::StringPrintf("T|%d|", getpid());
+    std::string expected = android::base::StringPrintf("G|%d|", getpid());
     std::string name =
             MakeName(ATRACE_MESSAGE_LENGTH - expected.length() - 1 - track_name_size - 6);
     atrace_async_for_track_begin_body("track_name", name.c_str(), 12345);
@@ -274,7 +274,7 @@
 }
 
 TEST_F(TraceDevTest, atrace_async_for_track_begin_body_truncated_name) {
-    std::string expected = android::base::StringPrintf("T|%d|track_name|", getpid());
+    std::string expected = android::base::StringPrintf("G|%d|track_name|", getpid());
     std::string name = MakeName(2 * ATRACE_MESSAGE_LENGTH);
     atrace_async_for_track_begin_body("track_name", name.c_str(), 12345);
 
@@ -289,7 +289,7 @@
 }
 
 TEST_F(TraceDevTest, atrace_async_for_track_begin_body_truncated_both) {
-    std::string expected = android::base::StringPrintf("T|%d|", getpid());
+    std::string expected = android::base::StringPrintf("G|%d|", getpid());
     std::string name = MakeName(2 * ATRACE_MESSAGE_LENGTH);
     std::string track_name = MakeName(2 * ATRACE_MESSAGE_LENGTH);
     atrace_async_for_track_begin_body(track_name.c_str(), name.c_str(), 12345);
@@ -312,13 +312,13 @@
 
     std::string actual;
     ASSERT_TRUE(android::base::ReadFdToString(atrace_marker_fd, &actual));
-    std::string expected = android::base::StringPrintf("U|%d|fake_track|fake_name|12345", getpid());
+    std::string expected = android::base::StringPrintf("H|%d|fake_track|fake_name|12345", getpid());
     ASSERT_STREQ(expected.c_str(), actual.c_str());
 }
 
 TEST_F(TraceDevTest, atrace_async_for_track_end_body_exact_track_name) {
     const int name_size = 5;
-    std::string expected = android::base::StringPrintf("U|%d|", getpid());
+    std::string expected = android::base::StringPrintf("H|%d|", getpid());
     std::string track_name =
             MakeName(ATRACE_MESSAGE_LENGTH - expected.length() - 1 - name_size - 6);
     atrace_async_for_track_end_body(track_name.c_str(), "name", 12345);
@@ -334,7 +334,7 @@
     // Add a single character and verify name truncation
     ASSERT_EQ(0, lseek(atrace_marker_fd, 0, SEEK_SET));
     track_name += '*';
-    expected = android::base::StringPrintf("U|%d|", getpid());
+    expected = android::base::StringPrintf("H|%d|", getpid());
     expected += track_name + "|nam|12345";
     atrace_async_for_track_end_body(track_name.c_str(), "name", 12345);
     EXPECT_EQ(ATRACE_MESSAGE_LENGTH - 1, lseek(atrace_marker_fd, 0, SEEK_CUR));
@@ -344,7 +344,7 @@
 }
 
 TEST_F(TraceDevTest, atrace_async_for_track_end_body_truncated_track_name) {
-    std::string expected = android::base::StringPrintf("U|%d|", getpid());
+    std::string expected = android::base::StringPrintf("H|%d|", getpid());
     std::string track_name = MakeName(2 * ATRACE_MESSAGE_LENGTH);
     atrace_async_for_track_end_body(track_name.c_str(), "name", 12345);
 
@@ -360,7 +360,7 @@
 
 TEST_F(TraceDevTest, atrace_async_for_track_end_body_exact_name) {
     const int track_name_size = 11;
-    std::string expected = android::base::StringPrintf("U|%d|", getpid());
+    std::string expected = android::base::StringPrintf("H|%d|", getpid());
     std::string name =
             MakeName(ATRACE_MESSAGE_LENGTH - expected.length() - 1 - track_name_size - 6);
     atrace_async_for_track_end_body("track_name", name.c_str(), 12345);
@@ -384,7 +384,7 @@
 }
 
 TEST_F(TraceDevTest, atrace_async_for_track_end_body_truncated_name) {
-    std::string expected = android::base::StringPrintf("U|%d|track_name|", getpid());
+    std::string expected = android::base::StringPrintf("H|%d|track_name|", getpid());
     std::string name = MakeName(2 * ATRACE_MESSAGE_LENGTH);
     atrace_async_for_track_end_body("track_name", name.c_str(), 12345);
 
@@ -399,7 +399,7 @@
 }
 
 TEST_F(TraceDevTest, atrace_async_for_track_end_body_truncated_both) {
-    std::string expected = android::base::StringPrintf("U|%d|", getpid());
+    std::string expected = android::base::StringPrintf("H|%d|", getpid());
     std::string name = MakeName(2 * ATRACE_MESSAGE_LENGTH);
     std::string track_name = MakeName(2 * ATRACE_MESSAGE_LENGTH);
     atrace_async_for_track_end_body(track_name.c_str(), name.c_str(), 12345);