Re: [virtio-dev] [PATCH] Add virtio parameter server device specification

[Hao Chen <chenhaosjtuacm@google.com>]

> Why not directly putting 9P links into virtio devices ?

We have thought about using files to represent properties, but it turns out we may need to subscribe to a large amount of

properties, so opening all of those files and polling is not ideal. Also the cross-property time-order matters in our case, so we abandoned this idea.

On Fri, Jun 4, 2021 at 3:50 AM Enrico Weigelt, metux IT consult <lkml@metux.net> wrote:

On 02.06.21 22:09, Hao Chen wrote:

> We can use any protocol to implement this, and publish it somewhere, but it
> does not carry the same weight as putting it in the virtio spec. It is
> easier to say
> "we use virtio, and for this device we use virtio-xxx device", but it
> would be weird to
> say "we use virtio, but for this device, we use vsock+some other non-standard
> protocol, please support this or you will break the compatibility".

Why not directly putting 9P links into virtio devices ?

In both cases we still have the problem knowing the actual meaning of
the individual parameters. Not so different from some raw IO space
(just a bit easier to parse).

I believe we need some layer above for describing the actual meanings.


--mtx

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Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
info@metux.net -- +49-151-27565287