From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ye Xiaolong <xiaolong.ye@intel.com>
Subject: Re: [PATCH v3 1/5] net/af_xdp: introduce AF XDP PMD
	driver
Date: Fri, 22 Mar 2019 10:04:26 +0800
Message-ID: <20190322020426.GE84243@intel.com>
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 <20190321091845.78495-1-xiaolong.ye@intel.com>
 <20190321091845.78495-2-xiaolong.ye@intel.com>
 <20190321082705.1ee71f1f@shemminger-XPS-13-9360>
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Cc: dev@dpdk.org, Qi Zhang <qi.z.zhang@intel.com>,
 Karlsson Magnus <magnus.karlsson@intel.com>,
 Topel Bjorn <bjorn.topel@intel.com>
To: Stephen Hemminger <stephen@networkplumber.org>
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On 03/21, Stephen Hemminger wrote:
>On Thu, 21 Mar 2019 17:18:41 +0800
>Xiaolong Ye <xiaolong.ye@intel.com> wrote:
>
>> static void kick_tx(struct pkt_tx_queue *txq)
>> +{
>> +	struct xsk_umem_info *umem = txq->pair->umem;
>> +
>> +	while (send(xsk_socket__fd(txq->pair->xsk), NULL,
>> +		      0, MSG_DONTWAIT) < 0) {
>> +		/* some thing unexpected */
>> +		if (errno != EBUSY && errno != EAGAIN)
>> +			break;
>> +
>> +		/* pull from complete qeueu to leave more space */
>> +		if (errno == EAGAIN)
>> +			pull_umem_cq(umem, ETH_AF_XDP_TX_BATCH_SIZE);
>> +	}
>
>What about EINTR??
>You should retry the send then.

Will do.