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Date: Mon, 4 Jul 2016 15:42:47 +0800
From: Yuanhan Liu <yuanhan.liu@linux.intel.com>
To: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Cc: dev@dpdk.org, thomas.monjalon@6wind.com, bruce.richardson@intel.com,
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Subject: Re: [dpdk-dev] [PATCH v2 2/3] virtio: move SSE based Rx
 implementation to separate file
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On Fri, Jul 01, 2016 at 04:46:37PM +0530, Jerin Jacob wrote:
> * Introduced cpuflag based run-time detection to
> select the SSE based simple Rx handler
> * Split out SSE instruction based virtio simple Rx
> implementation to a separate file

As your commit log says, it does two things, therefore, I'd suggest you
to do it in two patches, with each just does one thing as you mentioned.

> +static void
> +virtio_update_rxtx_handler(struct rte_eth_dev *dev,
> +			   const struct rte_eth_txconf *tx_conf)
> +{
> +	uint8_t use_simple_rxtx = 0;
> +	struct virtio_hw *hw = dev->data->dev_private;
> +
> +#if defined RTE_ARCH_X86
> +	if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_SSE3))
> +		use_simple_rxtx = 1;
> +#endif
> +	/* Use simple rx/tx func if single segment and no offloads */
> +	if (use_simple_rxtx &&
> +	   (tx_conf->txq_flags & VIRTIO_SIMPLE_FLAGS) == VIRTIO_SIMPLE_FLAGS &&
> +		!vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {

The alignment here is not consistent, something like following is what
I'd suggest:

	if (use_simple_rxtx &&
	    (tx_conf->txq_flags & VIRTIO_SIMPLE_FLAGS) == VIRTIO_SIMPLE_FLAGS &&
	    !vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {

	--yliu