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

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Message-ID: <fefa92f9-7981-c705-529b-992d712c413c@intel.com>
Date: Wed, 12 Jul 2023 12:53:34 -0700
From: "Nambiar, Amritha" <amritha.nambiar@...el.com>
To: Simon Horman <simon.horman@...igine.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 6/2/2023 8:42 AM, Simon Horman wrote:
> 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:/
> 

Will fix.

>> + *
>> + * 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.
> 

My bad. Will fix in the next version.

>> +		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)
>>   {
>>
>>