From 7aee3182a0bba41d352a50252872ccda2349b8b9 Mon Sep 17 00:00:00 2001
From: Xi Ruoyao <xry111@mengyan1223.wang>
Date: Sat, 19 Jun 2021 16:32:43 +0800
Subject: pkg management: add a note about kernel upgrade

---
 chapter08/pkgmgt.xml | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

(limited to 'chapter08')

diff --git a/chapter08/pkgmgt.xml b/chapter08/pkgmgt.xml
index 809421c3f..228a13378 100644
--- a/chapter08/pkgmgt.xml
+++ b/chapter08/pkgmgt.xml
@@ -51,10 +51,21 @@
 
     <itemizedlist>
       <listitem>
-        <para>If Glibc needs to be upgraded to a newer version, (e.g.  from
-        glibc-2.31 to glibc-2.32), it is safer to rebuild LFS.  Though you
-        <emphasis>may</emphasis> be able to rebuild all the packages in their
-        dependency order, we do not recommend it.  </para>
+        <para>If Linux kernel needs to be upgraded (for example, from
+        5.10.17 to 5.10.18 or 5.11.1), nothing else need to be rebuilt.
+        The system will keep working fine thanks to the well-defined border
+        between kernel and userspace.  Specifically, Linux API headers
+        need not to be (and should not be, see the next item) upgraded
+        alongside the kernel.  You'll need to reboot your system to use the
+        upgraded kernel.</para>
+      </listitem>
+
+      <listitem>
+        <para>If Linux API headers or Glibc needs to be upgraded to a newer
+        version, (e.g.  from glibc-2.31 to glibc-2.32), it is safer to
+        rebuild LFS.  Though you <emphasis>may</emphasis> be able to rebuild
+        all the packages in their dependency order, we do not recommend
+        it.  </para>
       </listitem>
 
       <listitem> <para>If a package containing a shared library is updated, and
-- 
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