Quieten the hypervisor

Quieten the hypervisor

[Tom Hibbert]

Hi all

I would like to see a boot option added similar to the 'quiet' option
for the Linux kernel to prevent the hypervisor outputting (XEN) lines to
the console. Can someone do this or point to where to make the changes
and I can do it? :)

Thanks

Tom

Re: Quieten the hypervisor

[Tom Hibbert]

> I would like to see a boot option added similar to the 'quiet' option
> for the Linux kernel to prevent the hypervisor outputting (XEN) lines to
> the console. Can someone do this or point to where to make the changes
> and I can do it? :)

I've taken a look through console.c and succeeded in turning everything
off (by commenting out some code in printf) but I would like the banner
to still appear, and the (XEN) stuff to go to xm dmesg, but not to vga.

Creating a xenlog call might be a good idea?

Thanks in advance

Tom

Re: Re: Quieten the hypervisor

[Keir Fraser]

On 19 Apr 2006, at 07:47, Tom Hibbert wrote:

>
>
>> I would like to see a boot option added similar to the 'quiet' option
>> for the Linux kernel to prevent the hypervisor outputting (XEN) lines 
>> to
>> the console. Can someone do this or point to where to make the changes
>> and I can do it? :)
>
> I've taken a look through console.c and succeeded in turning everything
> off (by commenting out some code in printf) but I would like the banner
> to still appear, and the (XEN) stuff to go to xm dmesg, but not to vga.
>
> Creating a xenlog call might be a good idea?

Xen already stops outputting to vga as soon as domain0 starts to boot 
(assuming it has console=tty0 on its command line). So you have two 
options:
  1. Pass 'console=none' to Xen as a boot parameter. No output on vga.
  2. Pass 'console=tty0' to domain0 as a boot parameter. Output on vga 
until dom0 starts.

There's no halfway house of just banner and then nothing else. That 
doesn't sound very useful.

  -- Keir