Re: [kvm-devel] [PATCH] kvm guest balloon driver

[Avi K. <av...@qu...>]

Anthony Liguori wrote:
> BTW, I don't think the target should be a config value.  You don't gain 
> anything from it being in the config space and it's somewhat unnatural 
> for a virtio device.  It makes more sense as a message to the guest.
>   

I disagree. The target is state, not an individual item that needs to be 
acted on. Having it as a single variable means that multiple changes are 
collapsed automatically, and that the the setting survives module reload.

It's like a volume control, it doesn't send messages when you turn it, 
it just sets a value.

(maybe a thermostat knob is a better analogy, with the driver being the 
circuitry around the knob that tries to control the temperature to match 
the setting)

I believe state-like controls will be useful for other settings, like 
ethernet link state.

-- 
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