diff --git a/migration/migration.c b/migration/migration.c
index 3da2ed37f3a88b5eca133df60d3f99e46c778904..353b7c9a09935260cd7f77474b7cd64b0aa74aea 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -121,6 +121,8 @@
 #define DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT_PERIOD     1000    /* milliseconds */
 #define DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT            1       /* MB/s */
 
+#define DEFAULT_FD_MAX 4096
+
 static NotifierList migration_state_notifiers =
     NOTIFIER_LIST_INITIALIZER(migration_state_notifiers);
 
@@ -2196,6 +2198,31 @@ void migrate_del_blocker(Error *reason)
     migration_blockers = g_slist_remove(migration_blockers, reason);
 }
 
+/*
+ * Kernel will expand the fatable allocated to the qemu process when
+ * the number of fds held by qemu process exceeds a power of 2 (starting from 64).
+ * Each expansion introduces tens of ms of latency due to RCU synchronization.
+ * The expansion is completed during qemu process initialization to avoid
+ * triggering this action during the migration downtime phase.
+ */
+static void qemu_pre_extend_fdtable(void)
+{
+    int buffer[DEFAULT_FD_MAX] = {0};
+    int i;
+
+    /* expand fdtable */
+    for (i = 0; i < DEFAULT_FD_MAX; i++) {
+        buffer[i] = qemu_dup(STDIN_FILENO);
+    }
+
+    /* close tmp fd */
+    for (i = 0; i < DEFAULT_FD_MAX; i++) {
+        if (buffer[i] > 0) {
+            (void)qemu_close(buffer[i]);
+        }
+    }
+}
+
 void qmp_migrate_incoming(const char *uri, Error **errp)
 {
     Error *local_err = NULL;
@@ -2214,6 +2241,8 @@ void qmp_migrate_incoming(const char *uri, Error **errp)
         return;
     }
 
+    qemu_pre_extend_fdtable();
+
     qemu_start_incoming_migration(uri, &local_err);
 
     if (local_err) {