netdev - Re: [RFC net-next v3 3/4] virtio

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Message-ID: <CACGkMEvLb3o3xe=GVW2ivngYoGt+0KfrWWTN1dsBT7ja-eeiQQ@mail.gmail.com>
Date: Wed, 22 Jan 2025 14:13:12 +0800
From: Jason Wang <jasowang@...hat.com>
To: Joe Damato <jdamato@...tly.com>
Cc: netdev@...r.kernel.org, gerhard@...leder-embedded.com, leiyang@...hat.com, 
	xuanzhuo@...ux.alibaba.com, mkarsten@...terloo.ca, 
	"Michael S. Tsirkin" <mst@...hat.com>, Eugenio Pérez <eperezma@...hat.com>, 
	Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller" <davem@...emloft.net>, 
	Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	"open list:VIRTIO CORE AND NET DRIVERS" <virtualization@...ts.linux.dev>, open list <linux-kernel@...r.kernel.org>
Subject: Re: [RFC net-next v3 3/4] virtio_net: Map NAPIs to queues

On Wed, Jan 22, 2025 at 3:11 AM Joe Damato <jdamato@...tly.com> wrote:
>
> Use netif_queue_set_napi to map NAPIs to queue IDs so that the mapping
> can be accessed by user apps.
>
> $ ethtool -i ens4 | grep driver
> driver: virtio_net
>
> $ sudo ethtool -L ens4 combined 4
>
> $ ./tools/net/ynl/pyynl/cli.py \
>        --spec Documentation/netlink/specs/netdev.yaml \
>        --dump queue-get --json='{"ifindex": 2}'
> [{'id': 0, 'ifindex': 2, 'napi-id': 8289, 'type': 'rx'},
>  {'id': 1, 'ifindex': 2, 'napi-id': 8290, 'type': 'rx'},
>  {'id': 2, 'ifindex': 2, 'napi-id': 8291, 'type': 'rx'},
>  {'id': 3, 'ifindex': 2, 'napi-id': 8292, 'type': 'rx'},
>  {'id': 0, 'ifindex': 2, 'type': 'tx'},
>  {'id': 1, 'ifindex': 2, 'type': 'tx'},
>  {'id': 2, 'ifindex': 2, 'type': 'tx'},
>  {'id': 3, 'ifindex': 2, 'type': 'tx'}]
>
> Note that virtio_net has TX-only NAPIs which do not have NAPI IDs, so
> the lack of 'napi-id' in the above output is expected.
>
> Signed-off-by: Joe Damato <jdamato@...tly.com>

Acked-by: Jason Wang <jasowang@...hat.com>

Thanks