[systemd-devel] How to delete device units presented in systemd-analyze plot.

Mantas Mikulėnas grawity at gmail.com
Thu Aug 8 02:52:15 PDT 2013


On Thu, Aug 8, 2013 at 4:10 AM, Tony Seo <tonyseo7 at gmail.com> wrote:
>
>  I understand what you mean, but I think that I will cut the time for
> loading device unit if I keep those from appearing on my plot.

No, just hiding them will not change anything.

>  What do think that loading time for device units doesn't affect to boot
> speed at machine?

It doesn't, because the units do not *exist*.

That's the part you keep misunderstanding. Device units by themselves
will not *make* systemd wait for a device. They exist only to *show*
that systemd *knows about* that device.

If you turn on the computer, and it takes several seconds for a device
like /sys/devices/platform/soc-audio/sound/card0 to appear, then it
*will* take several seconds for that device to appear, whether a
systemd shows it as a .device unit or not.






/sys/devices/platform/soc-audio/sound/card0
/sys/devices/platform/tcc-gmac/net/eth0
/sys/devices/platform/tcc-uart.0/tty/ttyTCC0
/sys/devices/platform/dwc_otg.0/gadget/tty/ttyGS0

...what kind of a device is it, anyway? A raspberryπ?

-- 
Mantas Mikulėnas <grawity at gmail.com>


More information about the systemd-devel mailing list