man: link to specific sections of cgroups-v2 document

The document is rather huge, and a specific link is easier to consume. The form
is a bit strange because troff puts the symlink at the bottom, keyed by title,
so we need to use the same link target in all places.

diff --git a/man/systemd.resource-control.xml b/man/systemd.resource-control.xml
index 4c9bfcc525ea31128cffde1b41e77f67b6efc8dd..ec3f6acbd55e9dc54f95609b500a24a3f67b4fb0 100644 (file)
--- a/man/systemd.resource-control.xml
+++ b/man/systemd.resource-control.xml
@@ -274,7 +274,7 @@
           useful in order to always inherit all of the protection afforded by ancestors.
           This controls the <literal>memory.min</literal> control group attribute. For details about this
           control group attribute, see <ulink
-          url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html">Control Groups v2</ulink>.</para>
+          url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html#memory-interface-files">Memory Interface Files</ulink>.</para>
 
           <para>This setting is supported only if the unified control group hierarchy is used and disables
           <varname>MemoryLimit=</varname>.</para>
@@ -300,7 +300,7 @@
           useful in order to always inherit all of the protection afforded by ancestors.
           This controls the <literal>memory.low</literal> control group attribute. For details about this
           control group attribute, see <ulink
-          url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html">Control Groups v2</ulink>.</para>
+          url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html#memory-interface-files">Memory Interface Files</ulink>.</para>
 
           <para>This setting is supported only if the unified control group hierarchy is used and disables
           <varname>MemoryLimit=</varname>.</para>
@@ -325,7 +325,7 @@
           system. If assigned the
           special value <literal>infinity</literal>, no memory throttling is applied. This controls the
           <literal>memory.high</literal> control group attribute. For details about this control group attribute, see
-          <ulink url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html">Control Groups v2</ulink>.</para>
+          <ulink url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html#memory-interface-files">Memory Interface Files</ulink>.</para>
 
           <para>This setting is supported only if the unified control group hierarchy is used and disables
           <varname>MemoryLimit=</varname>.</para>
@@ -346,7 +346,7 @@
           percentage value may be specified, which is taken relative to the installed physical memory on the system. If
           assigned the special value <literal>infinity</literal>, no memory limit is applied. This controls the
           <literal>memory.max</literal> control group attribute. For details about this control group attribute, see
-          <ulink url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html">Control Groups v2</ulink>.</para>
+          <ulink url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html#memory-interface-files">Memory Interface Files</ulink>.</para>
 
           <para>This setting replaces <varname>MemoryLimit=</varname>.</para>
         </listitem>
@@ -362,7 +362,7 @@
           parsed as Kilobytes, Megabytes, Gigabytes, or Terabytes (with the base 1024), respectively. If assigned the
           special value <literal>infinity</literal>, no swap limit is applied. This controls the
           <literal>memory.swap.max</literal> control group attribute. For details about this control group attribute,
-          see <ulink url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html">Control Groups v2</ulink>.</para>
+          see <ulink url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html#memory-interface-files">Memory Interface Files</ulink>.</para>
 
           <para>This setting is supported only if the unified control group hierarchy is used and disables
           <varname>MemoryLimit=</varname>.</para>
@@ -431,8 +431,9 @@
           hierarchy is used on the system. Takes a single weight value (between 1 and 10000) to set the default block
           I/O weight. This controls the <literal>io.weight</literal> control group attribute, which defaults to
           100. For details about this control group attribute, see <ulink
-          url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html">Control Groups v2</ulink>.  The available I/O
-          bandwidth is split up among all units within one slice relative to their block I/O weight.</para>
+          url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html#io-interface-files">IO Interface Files</ulink>.
+          The available I/O bandwidth is split up among all units within one slice relative to their block
+          I/O weight.</para>
 
           <para>While <varname>StartupIOWeight=</varname> only applies
           to the startup phase of the system,
@@ -457,7 +458,7 @@
           device of the file system of the file is determined. This controls the <literal>io.weight</literal> control
           group attribute, which defaults to 100. Use this option multiple times to set weights for multiple devices.
           For details about this control group attribute, see <ulink
-          url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html">Control Groups v2</ulink>.</para>
+          url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html#io-interface-files">IO Interface Files</ulink>.</para>
 
           <para>This setting replaces <varname>BlockIODeviceWeight=</varname> and disables settings prefixed with
           <varname>BlockIO</varname> or <varname>StartupBlockIO</varname>.</para>
@@ -479,7 +480,7 @@
           "/dev/disk/by-path/pci-0000:00:1f.2-scsi-0:0:0:0 5M"). This controls the <literal>io.max</literal> control
           group attributes. Use this option multiple times to set bandwidth limits for multiple devices. For details
           about this control group attribute, see <ulink
-          url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html">Control Groups v2</ulink>.
+          url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html#io-interface-files">IO Interface Files</ulink>.
           </para>
 
           <para>These settings replace <varname>BlockIOReadBandwidth=</varname> and
@@ -503,7 +504,7 @@
           "/dev/disk/by-path/pci-0000:00:1f.2-scsi-0:0:0:0 1K"). This controls the <literal>io.max</literal> control
           group attributes. Use this option multiple times to set IOPS limits for multiple devices. For details about
           this control group attribute, see <ulink
-          url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html">Control Groups v2</ulink>.
+          url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html#io-interface-files">IO Interface Files</ulink>.
           </para>
 
           <para>These settings are supported only if the unified control group hierarchy is used and disable settings
@@ -522,7 +523,7 @@
           system of the file is determined. This controls the <literal>io.latency</literal> control group
           attribute. Use this option multiple times to set latency target for multiple devices. For details about this
           control group attribute, see <ulink
-          url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html">Control Groups v2</ulink>.</para>
+          url="https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html#io-interface-files">IO Interface Files</ulink>.</para>
 
           <para>Implies <literal>IOAccounting=yes</literal>.</para>