diff --git a/chapter10/kernel/kernel.version b/chapter10/kernel/kernel.version
index 166d79d6d..dd0026fc1 100644
--- a/chapter10/kernel/kernel.version
+++ b/chapter10/kernel/kernel.version
@@ -1 +1 @@
-6.8.2
+6.8.9
diff --git a/chapter10/kernel/systemd.toml b/chapter10/kernel/systemd.toml
index b930e01a6..cfb8bf8f1 100644
--- a/chapter10/kernel/systemd.toml
+++ b/chapter10/kernel/systemd.toml
@@ -23,6 +23,11 @@ DMIID='*'
 INOTIFY_USER='*'
 TMPFS='*'
 TMPFS_POSIX_ACL='*'
+CGROUP_SCHED='* '
+
+[RT_GROUP_SCHED]
+value = ' '
+comment = 'This may cause some systemd features malfunction'
 
 revision='systemd'
 
diff --git a/chapter10/kernel/systemd.xml b/chapter10/kernel/systemd.xml
index b21d7d183..4960796ef 100644
--- a/chapter10/kernel/systemd.xml
+++ b/chapter10/kernel/systemd.xml
@@ -3,7 +3,7 @@
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 <!-- Automatically generated by kernel-config.py
      DO NOT EDIT! -->
-<screen role="nodump" revision="systemd"><emphasis role='blue'>G</emphasis>eneral setup ---&gt;
+<screen role="nodump"><emphasis role='blue'>G</emphasis>eneral setup ---&gt;
   [ ] <emphasis role='blue'>C</emphasis>ompile the kernel with warnings as errors                        [WERROR]
   <emphasis role='blue'>C</emphasis>PU/Task time and stats accounting ---&gt;
     [*] <emphasis role='blue'>P</emphasis>ressure stall information tracking                                [PSI]
@@ -11,7 +11,10 @@
                                                      ...  [PSI_DEFAULT_DISABLED]
   &lt; &gt; <emphasis role='blue'>E</emphasis>nable kernel headers through /sys/kernel/kheaders.tar.xz      [IKHEADERS]
   [*] <emphasis role='blue'>C</emphasis>ontrol Group support ---&gt;                                       [CGROUPS]
-    [*] M<emphasis role='blue'>e</emphasis>mory controller                                                [MEMCG]
+    [*]   M<emphasis role='blue'>e</emphasis>mory controller                                              [MEMCG]
+    [ /*] <emphasis role='blue'>C</emphasis>PU controller ---&gt;                                     [CGROUP_SCHED]
+      # This may cause some systemd features malfunction:
+      [ ] <emphasis role='blue'>G</emphasis>roup scheduling for SCHED_RR/FIFO                    [RT_GROUP_SCHED]
   [ ] <emphasis role='blue'>C</emphasis>onfigure standard kernel features (expert users) ---&gt;            [EXPERT]
 
 <emphasis role='blue'>P</emphasis>rocessor type and features ---&gt;