diff --git a/content/posts/cgroup v2 by hand.adoc b/content/posts/cgroup v2 by hand.adoc
index d287f5a..354c6a4 100644
--- a/content/posts/cgroup v2 by hand.adoc	
+++ b/content/posts/cgroup v2 by hand.adoc	
@@ -82,9 +82,10 @@ We will keep it simple by only setting controllers globally in our root cgroup.
 
 == Controlling CPU usage
 
-This control group will use the cpu controllerfootnote:controllers[]. Every
-process in this group will be deprioritized, all processes together can only use
-the power of 2 CPU cores.
+This control group will use the cpu
+controllerfootnote:[link:{url-kernel-doc}#cpu[Kernel documentation on Control
+Group v2, section Controllers → CPU]]. Every process in this group will be
+deprioritized, all processes together can only use the power of 2 CPU cores.
 
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@@ -126,8 +127,10 @@ values used by link:{url-nice}[nice] and has a range from -20 to 19.
 
 === Controlling CPU core usage
 
-This control group will use the cpuset controller to restrict the processes to
-the CPU cores 0 and 3.
+This control group will use the cpuset
+controllerfootnote:[link:{url-kernel-doc}#cpuset[Kernel documentation on Control
+Group v2, section Controllers → Cpuset]] to restrict the processes to the CPU
+cores 0 and 3.
 
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@@ -148,8 +151,9 @@ kbd:[Enter].
 
 == Controlling memory usage
 
-This control group will use the memory controllerfootnote:controllers[]. All
-processes together can only use 1
+This control group will use the memory
+controllerfootnote:[link:{url-kernel-doc}#memory[Kernel documentation on Control
+Group v2, section Controllers → Memory]]. All processes together can only use 1
 pass:[<abbr title="Gibibyte, 1024 Mebibyte">GiB</abbr>] of memory at most.
 
 [source,shell]
@@ -173,7 +177,8 @@ echo "$$" > cgroup.procs
 
 This control group will increase the IO priority and limit the write speed to 2
 pass:[<abbr title="Mebibyte, 1024 Kibibyte">MiB</abbr>] a second using the io
-controllerfootnote:controllers[]. IO limits are set per device. You need to
+controllerfootnote:[link:{url-kernel-doc}#io[Kernel documentation on Control
+Group v2, section Controllers → IO]]. IO limits are set per device. You need to
 specify the major and minor device numbers of the _device_ (not partition) you
 want to limit (in my case it is “8:0” for `/dev/sda`). Run `lsblk` or `cat
 /proc/partitions` to find them out.
@@ -209,7 +214,8 @@ yet, since I run kernel 5.10.
 == Controlling process numbers
 
 This control group will limit the amount of processes to 10 using the process
-number controllerfootnote:controllers[].
+number controllerfootnote:[link:{url-kernel-doc}#pid[Kernel documentation on
+Control Group v2, section Controllers → PID]].
 
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