netdev - Re: [PATCH RFC 3/4] vsock/virtio: change the maximum packet size allowed

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Message-ID: <20190408105619-mutt-send-email-mst@kernel.org>
Date:   Mon, 8 Apr 2019 10:57:44 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Stefano Garzarella <sgarzare@...hat.com>
Cc:     Stefan Hajnoczi <stefanha@...hat.com>,
        Stefan Hajnoczi <stefanha@...il.com>, netdev@...r.kernel.org,
        Jason Wang <jasowang@...hat.com>, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH RFC 3/4] vsock/virtio: change the maximum packet size
 allowed

On Mon, Apr 08, 2019 at 04:55:31PM +0200, Stefano Garzarella wrote:
> > Anyway, any change to this behavior requires compatibility so new guest
> > drivers work with old vhost_vsock.ko.  Therefore we should probably just
> > leave the limit for now.
> 
> I understood your point of view and I completely agree with you.
> But, until we don't have a way to expose features/versions between guest
> and host,

Why not use the standard virtio feature negotiation mechanism for this?

> maybe is better to leave the limit in order to be compatible
> with old vhost_vsock.

-- 
MST