Re: [PATCH 1/3] mlx5_vdpa: should exclude header length and fcs from mtu

2021-02-07 Thread Eli Cohen
On Sat, Feb 06, 2021 at 04:29:22AM -0800, Si-Wei Liu wrote: > When feature VIRTIO_NET_F_MTU is negotiated on mlx5_vdpa, > 22 extra bytes worth of MTU length is shown in guest. > This is because the mlx5_query_port_max_mtu API returns > the "hardware" MTU value, which does not just contain the > Eth

Re: [PATCH 1/3] mlx5_vdpa: should exclude header length and fcs from mtu

2021-02-07 Thread Jason Wang
On 2021/2/6 下午8:29, Si-Wei Liu wrote: When feature VIRTIO_NET_F_MTU is negotiated on mlx5_vdpa, 22 extra bytes worth of MTU length is shown in guest. This is because the mlx5_query_port_max_mtu API returns the "hardware" MTU value, which does not just contain the Ethernet payload, but includes

[PATCH 1/3] mlx5_vdpa: should exclude header length and fcs from mtu

2021-02-06 Thread Si-Wei Liu
When feature VIRTIO_NET_F_MTU is negotiated on mlx5_vdpa, 22 extra bytes worth of MTU length is shown in guest. This is because the mlx5_query_port_max_mtu API returns the "hardware" MTU value, which does not just contain the Ethernet payload, but includes extra lengths starting from the Ethernet h