netdev - Re: [net-next/RFC PATCH v1 2/4] net: Add support for associating napi with queue[s]

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Date: Fri, 2 Jun 2023 17:42:17 +0200
From: Simon Horman <simon.horman@...igine.com>
To: Amritha Nambiar <amritha.nambiar@...el.com>
Cc: netdev@...r.kernel.org, kuba@...nel.org, davem@...emloft.net,
	sridhar.samudrala@...el.com
Subject: Re: [net-next/RFC PATCH v1 2/4] net: Add support for associating
 napi with queue[s]

On Thu, Jun 01, 2023 at 10:42:30AM -0700, Amritha Nambiar wrote:
> After the napi context is initialized, map the napi instance
> with the queue/queue-set on the corresponding irq line.
> 
> Signed-off-by: Amritha Nambiar <amritha.nambiar@...el.com>

Hi Amritha,

some minor feedback from my side.

...

> diff --git a/net/core/dev.c b/net/core/dev.c
> index 9ee8eb3ef223..ba712119ec85 100644
> --- a/net/core/dev.c
> +++ b/net/core/dev.c
> @@ -6366,6 +6366,40 @@ int dev_set_threaded(struct net_device *dev, bool threaded)
>  }
>  EXPORT_SYMBOL(dev_set_threaded);
>  
> +/**
> + * netif_napi_add_queue - Associate queue with the napi
> + * @napi: NAPI context
> + * @queue_index: Index of queue
> + * @napi_container_type: queue type as RX or TX

s/@...i_container_type:/@...e:/

> + *
> + * Add queue with its corresponding napi context
> + */
> +int netif_napi_add_queue(struct napi_struct *napi, u16 queue_index,
> +			 enum napi_container_type type)
> +{
> +	struct napi_queue *napi_queue;
> +
> +	napi_queue = kzalloc(sizeof(*napi_queue), GFP_KERNEL);
> +	if (!napi_queue)
> +		return -ENOMEM;
> +
> +	napi_queue->queue_index = queue_index;
> +
> +	switch (type) {
> +	case NAPI_RX_CONTAINER:
> +		list_add_rcu(&napi_queue->q_list, &napi->napi_rxq_list);
> +		break;
> +	case NAPI_TX_CONTAINER:
> +		list_add_rcu(&napi_queue->q_list, &napi->napi_txq_list);
> +		break;
> +	default:

Perhaps napi_queue is leaked here.

> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL(netif_napi_add_queue);
> +
>  void netif_napi_add_weight(struct net_device *dev, struct napi_struct *napi,
>  			   int (*poll)(struct napi_struct *, int), int weight)
>  {
> 
>