linux-kernel - Re: [PATCH v4 5/5] vsock/virtio: change the maximum packet size allowed

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Date:   Thu, 18 Jul 2019 09:52:41 +0200
From:   Stefano Garzarella <sgarzare@...hat.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Stefan Hajnoczi <stefanha@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        virtualization@...ts.linux-foundation.org,
        Jason Wang <jasowang@...hat.com>, kvm@...r.kernel.org
Subject: Re: [PATCH v4 5/5] vsock/virtio: change the maximum packet size
 allowed

On Wed, Jul 17, 2019 at 5:00 PM Michael S. Tsirkin <mst@...hat.com> wrote:
>
> On Wed, Jul 17, 2019 at 01:30:30PM +0200, Stefano Garzarella wrote:
> > Since now we are able to split packets, we can avoid limiting
> > their sizes to VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE.
> > Instead, we can use VIRTIO_VSOCK_MAX_PKT_BUF_SIZE as the max
> > packet size.
> >
> > Signed-off-by: Stefano Garzarella <sgarzare@...hat.com>
>
>
> OK so this is kind of like GSO where we are passing
> 64K packets to the vsock and then split at the
> low level.

Exactly, something like that in the Host->Guest path, instead in the
Guest->Host we use the entire 64K packet.

Thanks,
Stefano