Re: [Xen-devel] [PATCH] Allow Xend to find device number for sdX or hdX with udev

[Felipe Alfaro Solana <lkml@xxxxxxx>]

On 14 Jan 2005, at 22:00, Anthony Liguori wrote:

> Symptom:
> When using a udev-based dom0, if you try to create a domU with a 
> virtual
> sda device and you do not have a local scsi device xm create fails.
>
> Fix:
> When using udev, only the device nodes needed are made.  The follow
> patch changes Xend to return a device number based on:
>
> http://www.lanana.org/docs/device-list/devices.txt
>
> For sd and hd devices if stat() fails.  It was tested against both 
> 2.0.2
> and 2.0.3.
Another solution is to tell udev to automatically create /dev/sda1 
every time it gets started:
# mknod /etc/udev/devices b 8 1

When udev starts, all device files inside /etc/udev/devices are 
automatically copied to /dev, with no further configuration or 
triggering of hotplug or coldplug events.
NOTE: This is what I use for VMware, which needs a lot of /dev/vm* 
devices to function properly: I moved all VMware-specific device files 
into /etc/udev/devices so when udev starts, those files are copied back 
to /dev.


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