Udevd prerequisite devices?

Udevd prerequisite devices?

[Ersin Akinci]

Just curious, what devices does udevd require to be present in /dev 
before starting?  Right now, I have null, tty0, and console, but then 
udevd hangs during boot.  When I copy just null, udevd starts but 
doesn't populate /dev.  Finally, when I try to copy null, tty0, console, 
and zero, cp complains about not enough space on the device (I'm 
guessing on the /dev tmpfs).  I'm running everything out of an 
initramfs, perhaps that changes things.

-Ersin

Re: Udevd prerequisite devices?

[Kay Sievers]

On Fri, Apr 9, 2010 at 00:48, Ersin Akinci <ersin.akinci@gmail.com> wrote:
> Just curious, what devices does udevd require to be present in /dev
> before starting?  Right now, I have null, tty0, and console, but then
> udevd hangs during boot.  When I copy just null, udevd starts but
> doesn't populate /dev.  Finally, when I try to copy null, tty0, console,
> and zero, cp complains about not enough space on the device (I'm
> guessing on the /dev tmpfs).  I'm running everything out of an
> initramfs, perhaps that changes things.

That sounds more like a different issue than udev itself.

/dev/null should be all you need. /dev/console would be useful, and
/dev/kmsg udev tries to write its startup message to, but only
/dev/null should be needed.

Anyway, just might just want to mount devtmpfs at /dev before starting
udev and all should be solved without the need for any manual device
node creation.

Kay