linux-kernel - Re: [PATCH] virtio_console: Add support for multiple ports for generic guest and host communication

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Date:	Fri, 11 Sep 2009 12:35:18 -0500
From:	Anthony Liguori <anthony@...emonkey.ws>
To:	Amit Shah <amit.shah@...hat.com>
CC:	Alan Cox <alan@...ux.intel.com>, rusty@...tcorp.com.au,
	virtualization@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] virtio_console: Add support for multiple ports for generic
 guest and host communication

Amit Shah wrote:
> On (Fri) Sep 11 2009 [12:26:16], Anthony Liguori wrote:
>   
>> Amit Shah wrote:
>>     
>>> Right; there was some discussion about this. A few alternatives were
>>> suggested like
>>>
>>> - udev scripts to create symlinks from ports to function, like:
>>>
>>>   /dev/vcon3 -> /dev/virtio-console/clipboard
>>>
>>> - Some fqdn-like hierarchy, like
>>>
>>>   /dev/virtio-console/com/redhat/clipboard
>>>
>>>   which again can be created by udev scripts
>>>   
>>>       
>> And I dislike all of them.  What I'd rather have is these devices  
>> exposed as tty's with a sys attribute that exposed the name of the 
>> device.
>>     
>
> A sysfs attribute can even be exposed with a char device.
>
> I didn't want to venture more into tty after the hvc thing and the
> unexpected bugs that crept up (memory corruption, which is now fixed in
> linux-next). I'd rather just keep it limited to the subsystems I know.
>   

I don't think that's a good justification.

This device is very much a serial port.  I don't see any reason not to 
treat it like one.

Regards,

Anthony Liguori
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