diff --git a/libbpf_android/BpfUtils.cpp b/libbpf_android/BpfUtils.cpp
index 9f482d6..f5741bb 100644
--- a/libbpf_android/BpfUtils.cpp
+++ b/libbpf_android/BpfUtils.cpp
@@ -23,6 +23,7 @@
 #include <linux/bpf.h>
 #include <linux/if_ether.h>
 #include <linux/in.h>
+#include <linux/pfkeyv2.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/mman.h>
@@ -43,7 +44,9 @@
 using android::netdutils::MemBlock;
 using android::netdutils::Slice;
 
-constexpr size_t LOG_BUF_SIZE = 65536;
+// The buffer size for the buffer that records program loading logs, needs to be large enough for
+// the largest kernel program.
+constexpr size_t LOG_BUF_SIZE = 0x20000;
 
 namespace android {
 namespace bpf {
@@ -212,6 +215,27 @@
     return sock_cookie;
 }
 
+int synchronizeKernelRCU() {
+    // This is a temporary hack for network stats map swap on devices running
+    // 4.9 kernels. The kernel code of socket release on pf_key socket will
+    // explicitly call synchronize_rcu() which is exactly what we need.
+    int pfSocket = socket(AF_KEY, SOCK_RAW | SOCK_CLOEXEC, PF_KEY_V2);
+
+    if (pfSocket < 0) {
+        int ret = -errno;
+        ALOGE("create PF_KEY socket failed: %s", strerror(errno));
+        return ret;
+    }
+
+    // When closing socket, synchronize_rcu() gets called in sock_release().
+    if (close(pfSocket)) {
+        int ret = -errno;
+        ALOGE("failed to close the PF_KEY socket: %s", strerror(errno));
+        return ret;
+    }
+    return 0;
+}
+
 bool hasBpfSupport() {
     struct utsname buf;
     int kernel_version_major;
diff --git a/libbpf_android/include/bpf/BpfUtils.h b/libbpf_android/include/bpf/BpfUtils.h
index 6bb1f0f..426dc02 100644
--- a/libbpf_android/include/bpf/BpfUtils.h
+++ b/libbpf_android/include/bpf/BpfUtils.h
@@ -150,6 +150,7 @@
 bool hasBpfSupport();
 int parseProgramsFromFile(const char* path, BpfProgInfo* programs, size_t size,
                           const std::vector<BpfMapInfo>& mapPatterns);
+int synchronizeKernelRCU();
 
 #define SKIP_IF_BPF_NOT_SUPPORTED     \
     do {                              \
diff --git a/progs/netd.h b/progs/netd.h
index 6b2d103..ff97753 100644
--- a/progs/netd.h
+++ b/progs/netd.h
@@ -110,21 +110,21 @@
     .type = BPF_MAP_TYPE_HASH,
     .key_size = sizeof(uint32_t),
     .value_size = sizeof(struct stats_value),
-    .max_entries = UID_STATS_MAP_SIZE,
+    .max_entries = APP_STATS_MAP_SIZE,
 };
 
-struct bpf_map_def SEC("maps") uid_stats_map = {
+struct bpf_map_def SEC("maps") stats_map_A = {
     .type = BPF_MAP_TYPE_HASH,
     .key_size = sizeof(struct stats_key),
     .value_size = sizeof(struct stats_value),
-    .max_entries = UID_STATS_MAP_SIZE,
+    .max_entries = STATS_MAP_SIZE,
 };
 
-struct bpf_map_def SEC("maps") tag_stats_map = {
+struct bpf_map_def SEC("maps") stats_map_B = {
     .type = BPF_MAP_TYPE_HASH,
     .key_size = sizeof(struct stats_key),
     .value_size = sizeof(struct stats_value),
-    .max_entries = TAG_STATS_MAP_SIZE,
+    .max_entries = STATS_MAP_SIZE,
 };
 
 struct bpf_map_def SEC("maps") iface_stats_map = {
@@ -218,8 +218,8 @@
     return false;
 }
 
-static __always_inline BpfConfig getConfig() {
-    uint32_t mapSettingKey = CONFIGURATION_KEY;
+static __always_inline BpfConfig getConfig(uint32_t configKey) {
+    uint32_t mapSettingKey = configKey;
     BpfConfig* config = find_map_entry(&configuration_map, &mapSettingKey);
     if (!config) {
         // Couldn't read configuration entry. Assume everything is disabled.
@@ -233,7 +233,7 @@
 
     if ((uid <= MAX_SYSTEM_UID) && (uid >= MIN_SYSTEM_UID)) return BPF_PASS;
 
-    BpfConfig enabledRules = getConfig();
+    BpfConfig enabledRules = getConfig(UID_RULES_CONFIGURATION_KEY);
     if (!enabledRules) {
         return BPF_PASS;
     }
@@ -252,6 +252,15 @@
     return BPF_PASS;
 }
 
+static __always_inline inline void update_stats_with_config(struct __sk_buff* skb, int direction,
+                                                            void* key, uint8_t selectedMap) {
+    if (selectedMap == SELECT_MAP_A) {
+        bpf_update_stats(skb, &stats_map_A, direction, key);
+    } else if (selectedMap == SELECT_MAP_B) {
+        bpf_update_stats(skb, &stats_map_B, direction, key);
+    }
+}
+
 static __always_inline inline int bpf_traffic_account(struct __sk_buff* skb, int direction) {
     uint32_t sock_uid = get_socket_uid(skb);
     int match = bpf_owner_match(skb, sock_uid);
@@ -277,12 +286,18 @@
     uint8_t* counterSet = find_map_entry(&uid_counterset_map, &uid);
     if (counterSet) key.counterSet = (uint32_t)*counterSet;
 
+    uint32_t mapSettingKey = CURRENT_STATS_MAP_CONFIGURATION_KEY;
+    uint8_t* selectedMap = find_map_entry(&configuration_map, &mapSettingKey);
+    if (!selectedMap) {
+        return match;
+    }
+
     if (tag) {
-        bpf_update_stats(skb, &tag_stats_map, direction, &key);
+        update_stats_with_config(skb, direction, &key, *selectedMap);
     }
 
     key.tag = 0;
-    bpf_update_stats(skb, &uid_stats_map, direction, &key);
+    update_stats_with_config(skb, direction, &key, *selectedMap);
     bpf_update_stats(skb, &app_uid_stats_map, direction, &uid);
     return match;
 }