Are you aware that tools like mkosi already generate initrds which run systemd? And systemd already has the logic to let services survive the pivot_root (though that is discouraged and you should better use fdstore to pass existing state to a new instance of the service). Cheers, Nils <div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Sep 23, 2024, 12:45 <<a href="mailto:Dharma.B@microchip.com">Dharma.B@microchip.com</a>> wrote: </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Team, I'm exploring the possibility of splitting the systemd binary to optimize boot time before and after switching to the root filesystem. I’m aware that the systemd binary is quite large and may not fit in the initramfs, but is it feasible to have a minimal version of systemd that can invoke essential services and continue tracking them after transitioning to the main root filesystem? This approach is aimed at speeding up the boot process. I’m unsure if this is possible, which is why I’m seeking guidance from the systemd mailing list. -- With Best Regards, Dharma B. </blockquote></div>