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Date: Thu, 09 Apr 2009 18:15:49 +0300
From: Avi Kivity <avi@redhat.com>
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Subject: Re: [libvirt] Re: [Qemu-devel] [PATCH 1/6] Allow multiple monitor
	devices (v2)
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To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: libvir-list@redhat.com, Anthony Liguori <aliguori@us.ibm.com>, Gerd Hoffmann <kraxel@redhat.com>, Hollis Blanchard <hollisb@us.ibm.com>, qemu-devel@nongnu.org

Jan Kiszka wrote:
> Avi Kivity wrote:
>   
>> Gerd Hoffmann wrote:
>>     
>>> On 04/09/09 16:03, Avi Kivity wrote:
>>>       
>>>> I don't want multiplexed monitor sessions, at all.
>>>>         
>>> I'm very happy to finally see them.  Finally one can run vms with
>>> libvirt and *still* access the monitor for debugging and development
>>> purposes.
>>>
>>>       
>> Right, I like them for that purpose as well.  But not for ordinary control.
>>     
>
> How do you want to differentiate? What further complications would this
> bring us?
>   

I'm not sure I understand your questions.  Multiple monitor sessions are 
like multiple shell sessions.  I don't think a control program should 
use more than one session, but it should allow a developer to connect to 
issue 'info registers' and 'x/20i' commands.  Of course if a developer 
issues 'quit' or a hotunplug command, things will break.


>
> Please no more async notifications to the monitors. They are just ugly
> to parse, at least for us humans. I don't want to see any notification
> in the middle of my half-typed command e.g.
>   

If we can identify an interactive session, we might redraw the partial 
command after the prompt.

btw, why would a human enable notifications?  Note notifications enabled 
on the management session will only be displayed there.

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