[libvirt] Re: [Qemu-devel] [PATCH 1/6] Allow multiple monitor devices (v2)
Anthony Liguori wrote:
Hollis Blanchard wrote:
> On Wed, 2009-04-08 at 13:34 -0500, Anthony Liguori wrote:
>
>> Right now only one monitor device can be enabled at a time. In
>> order to support
>> asynchronous notification of events, I would like to introduce a
>> 'wait' command
>> that waits for an event to occur. This implies that we need an
>> additional
>> monitor session to allow commands to still be executed while waiting
>> for an
>> asynchronous notification.
>>
>
> Was there any consensus reached in this thread? I'm once again looking
> for ways to communicate qemu watchdog events to libvirt.
>
We can do multiple monitors as a debugging tool, but to support
events, a proper machine monitor mode is a prerequisite.
The real requirement is that events are obtainable via a single
communication channel instead of requiring two separate communication
channels. Internal implementation will look at lot like these patches.
The reasoning for requiring a single channel is that coordinating
between the two channels is expected to be prohibitively difficult.
To have a single channel, we need a machine mode. It cannot be done
in a human readable fashion.
I think this summarizes the consensus we reached. I don't agree fully
with the above but I'm okay with it.
If you don't agree with it, it isn't a consensus.
Would you agree Avi?
It represents my views fairly accurately. I'm not convinced that you
can't to event notifications without machine mode, but on the other hand
I do think introducing machine mode and layering notifications on top of
that is the best way to proceed, so I can't complain.
--
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