From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stefan Hajnoczi <stefanha@redhat.com>
Subject: Re: [PATCH v4 2/5] vsock/virtio: reduce credit update messages
Date: Mon, 22 Jul 2019 09:36:40 +0100
Message-ID: <20190722083640.GB24934__26183.0543213122$1563784622$gmane$org@stefanha-x1.localdomain>
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To: Stefano Garzarella <sgarzare@redhat.com>
Cc: kvm@vger.kernel.org, "Michael S. Tsirkin" <mst@redhat.com>, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, "David S. Miller" <davem@davemloft.net>
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On Wed, Jul 17, 2019 at 01:30:27PM +0200, Stefano Garzarella wrote:
> In order to reduce the number of credit update messages,
> we send them only when the space available seen by the
> transmitter is less than VIRTIO_VSOCK_MAX_PKT_BUF_SIZE.
>=20
> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
> ---
>  include/linux/virtio_vsock.h            |  1 +
>  net/vmw_vsock/virtio_transport_common.c | 16 +++++++++++++---
>  2 files changed, 14 insertions(+), 3 deletions(-)

It's an arbitrary limit but the risk of regressions is low since the
credit update traffic was so excessive:

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

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