Re: [Xen-devel] Problems in starting up domU with Xen-ARM (on Cortex-A15 Fast Models)

[XiaoGuang Wang <xjtuwxg@xxxxxxxxx>]

2013/9/30 Ian Campbell <Ian.Campbell@xxxxxxxxxx>

On Mon, 2013-09-30 at 09:40 -0400, XiaoGuang Wang wrote:
> Hi,
> 2013/9/30 Ian Campbell <Ian.Campbell@xxxxxxxxxx>
>         On Sun, 2013-09-29 at 22:55 -0400, XiaoGuang Wang wrote:
>
>         > There is no /dev/xen/ directory.
>
>
>         Are you running udev?
> I think the udev is not running. Because when I start udevd, it comes
> up error message and halts.
> root@(none):/home/xiaogw# udevd
> udevd[56]: error: runtime directory '/run/udev' not writable, for now
> falling back to '/dev/.udev'

This is your problem, which has nothing to do with Xen AFAICT.

Firstly you probably want to start udev via the initscripts not by hand,
secondly you probably need other (distro dependent) initscripts to run
first to ensure things like /run/ are mounted.

I guess you are booting with init=/bin/sh or something similar?

Sorry Ian, I'm a newcomer on Xen and system works. I have no idea about start udev via initscripts. I modify .config and set cmdline (remove init=/bin/sh) with the following:
CONFIG_CMDLINE="earlyprintk=xenboot console=ttyAMA1 root=/dev/mmcblk0 debug rw"

And it still doesn't work.

Actually, when the dom0 starts up, the /proc is empty. And I have to manually the /proc and /proc/xen with:
mount -t proc proc /proc
mount -t xenfs xen /proc/xen

Which are the results I found from google.

Ian.

Thanks.

Xiaoguang

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