Re: [Qemu-devel] [PATCH 0 of 4] Add virtio-console support to qemu

[Avi Kivity <avi@redhat.com>]

Christian Borntraeger wrote:
>> What is the advantage of virtio-console, compared to the standard serial 
>> port?
>>     
>
> I cannot talk about the qemu version, but looking at kuli (the experimental 
> kvm userspace for s390) these things come into my mind:
>
> - it is not limited to to serial speed settings (9600..115200 etc.)
>   

Neither is the emulated serial port :)

> - the kernel driver of virtio_console has console resizing support. Adding 
> resize support into qemu should be an easy addon patch, it was quite easy in 
> kuli. This would be really cool. Running kvm with nographic and virtio 
> console on stdio would allow vim or mc to get notifications about resizes of 
> the underlying console - like running native.
>   

That's good to have, certainly.

> - will work on platforms without a serial port (like s390) 
>   

I'm looking forward to the emulated punch card device.

> Maybe we can also use this to move existing lguest guests into kvm
>   

Won't work due to lguest's abilessness.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.