diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst
index b0d44a0..16810d1 100644
--- a/docs/system/deprecated.rst
+++ b/docs/system/deprecated.rst
@@ -75,12 +75,6 @@
 silently ignored. Using the switch with HMP monitors will become an
 error in the future.
 
-``-realtime`` (since 4.1)
-'''''''''''''''''''''''''
-
-The ``-realtime mlock=on|off`` argument has been replaced by the
-``-overcommit mem-lock=on|off`` argument.
-
 RISC-V ``-bios`` (since 5.1)
 ''''''''''''''''''''''''''''
 
diff --git a/docs/system/removed-features.rst b/docs/system/removed-features.rst
index 8a974f7..58d4e38 100644
--- a/docs/system/removed-features.rst
+++ b/docs/system/removed-features.rst
@@ -20,6 +20,12 @@
 
 The ``-no-kvm`` argument was a synonym for setting ``-machine accel=tcg``.
 
+``-realtime`` (removed in 6.0)
+''''''''''''''''''''''''''''''
+
+The ``-realtime mlock=on|off`` argument has been replaced by the
+``-overcommit mem-lock=on|off`` argument.
+
 ``-tb-size`` option (removed in 6.0)
 ''''''''''''''''''''''''''''''''''''
 
diff --git a/qemu-options.hx b/qemu-options.hx
index 6f00987..c85f73e 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -3713,17 +3713,6 @@
     Do not start CPU at startup (you must type 'c' in the monitor).
 ERST
 
-DEF("realtime", HAS_ARG, QEMU_OPTION_realtime,
-    "-realtime [mlock=on|off]\n"
-    "                run qemu with realtime features\n"
-    "                mlock=on|off controls mlock support (default: on)\n",
-    QEMU_ARCH_ALL)
-SRST
-``-realtime mlock=on|off``
-    Run qemu with realtime features. mlocking qemu and guest memory can
-    be enabled via ``mlock=on`` (enabled by default).
-ERST
-
 DEF("overcommit", HAS_ARG, QEMU_OPTION_overcommit,
     "-overcommit [mem-lock=on|off][cpu-pm=on|off]\n"
     "                run qemu with overcommit hints\n"
@@ -3739,8 +3728,7 @@
 
     Locking qemu and guest memory can be enabled via ``mem-lock=on``
     (disabled by default). This works when host memory is not
-    overcommitted and reduces the worst-case latency for guest. This is
-    equivalent to ``realtime``.
+    overcommitted and reduces the worst-case latency for guest.
 
     Guest ability to manage power state of host cpus (increasing latency
     for other processes on the same host cpu, but decreasing latency for
diff --git a/softmmu/vl.c b/softmmu/vl.c
index da9a0bd..b3918d6 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -326,18 +326,6 @@
     },
 };
 
-static QemuOptsList qemu_realtime_opts = {
-    .name = "realtime",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_realtime_opts.head),
-    .desc = {
-        {
-            .name = "mlock",
-            .type = QEMU_OPT_BOOL,
-        },
-        { /* end of list */ }
-    },
-};
-
 static QemuOptsList qemu_overcommit_opts = {
     .name = "overcommit",
     .head = QTAILQ_HEAD_INITIALIZER(qemu_overcommit_opts.head),
@@ -2600,7 +2588,6 @@
     qemu_add_opts(&qemu_add_fd_opts);
     qemu_add_opts(&qemu_object_opts);
     qemu_add_opts(&qemu_tpmdev_opts);
-    qemu_add_opts(&qemu_realtime_opts);
     qemu_add_opts(&qemu_overcommit_opts);
     qemu_add_opts(&qemu_msg_opts);
     qemu_add_opts(&qemu_name_opts);
@@ -3418,27 +3405,13 @@
                     exit(1);
                 }
                 break;
-            case QEMU_OPTION_realtime:
-                warn_report("'-realtime mlock=...' is deprecated, please use "
-                             "'-overcommit mem-lock=...' instead");
-                opts = qemu_opts_parse_noisily(qemu_find_opts("realtime"),
-                                               optarg, false);
-                if (!opts) {
-                    exit(1);
-                }
-                /* Don't override the -overcommit option if set */
-                enable_mlock = enable_mlock ||
-                    qemu_opt_get_bool(opts, "mlock", true);
-                break;
             case QEMU_OPTION_overcommit:
                 opts = qemu_opts_parse_noisily(qemu_find_opts("overcommit"),
                                                optarg, false);
                 if (!opts) {
                     exit(1);
                 }
-                /* Don't override the -realtime option if set */
-                enable_mlock = enable_mlock ||
-                    qemu_opt_get_bool(opts, "mem-lock", false);
+                enable_mlock = qemu_opt_get_bool(opts, "mem-lock", false);
                 enable_cpu_pm = qemu_opt_get_bool(opts, "cpu-pm", false);
                 break;
             case QEMU_OPTION_msg:
diff --git a/tests/migration/guestperf/engine.py b/tests/migration/guestperf/engine.py
index e2a214b..83bfc3b 100644
--- a/tests/migration/guestperf/engine.py
+++ b/tests/migration/guestperf/engine.py
@@ -304,7 +304,7 @@
             argv_source += ["-mem-path", "/dev/shm",
                             "-mem-prealloc"]
         if hardware._locked_pages:
-            argv_source += ["-realtime", "mlock=on"]
+            argv_source += ["-overcommit", "mem-lock=on"]
         if hardware._huge_pages:
             pass