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<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif">Hello systemd developers,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif">Currently, I am working on a task to reduce the boot time of an embedded product. systemd is used as the init system. I have a couple of questions, could you please clarify?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-family:"Verdana",sans-serif"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-family:"Verdana",sans-serif">From the systemd-analyze plot, I am seeing that it takes around 2 seconds to load the systemd unit files. Is there any way to reduce this time? I read a blog about systemd-readahead
and systemd-replay services used in such cases to reduce the loading time, but it also have mentioned that the services are not maintained in the latest systemd versions. Is it advisable to use such services?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-family:"Verdana",sans-serif"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-family:"Verdana",sans-serif">There are some systemd services which are used mostly for debugging purposes, so I tried to mask those services. My question is if the service is masked , do the service files gets
loaded during the systemd initialization? I have masked around 5 services but I am not seeing any reduction in the systemd unit files loading time though there is a considerable reduction in the overall boot time.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]><span style="font-family:"Verdana",sans-serif">I have read that the preferred way to have the mount points is to write in /etc/fstab. This will create a *.mount file using systemd_fstab_generator. I am seeing that in the project for
the debugfs there is a systemd mount file defined in /lib/systemd/system/ and also an option present in /etc/fstab (</span>‘<i>debugfs /sys/kernel/debug debugfs noauto 0 0’).</i>
<o:p></o:p></p>
<p class="MsoListParagraph"><span style="font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-indent:18.0pt"><span style="font-family:"Verdana",sans-serif">Which file has precedence when the system is initialized?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><span style="font-family:"Verdana",sans-serif">/lib/systemd/system/sys-kernel-debug.mount<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><span style="font-family:"Verdana",sans-serif">or<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><span lang="DE" style="font-family:"Verdana",sans-serif">/run/systemd/generator/sys-kernel-debug.mount<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE" style="font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="DE" style="font-family:"Verdana",sans-serif;color:black">Mit freundlichen Grüßen / Best regards<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE" style="font-family:"Verdana",sans-serif;color:black">Vinothkumar Eswaran</span><span lang="DE" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black"><br>
<br>
</span><o:p></o:p></p>
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