[dpdk-dev] [PATCH 4/5] vhost: do not use rte_memcpy for virtio_hdr copy

[Xie, Huawei]

On 1/27/2016 11:22 AM, Yuanhan Liu wrote:
> On Wed, Jan 27, 2016 at 02:46:39AM +0000, Xie, Huawei wrote:
>> On 12/3/2015 2:03 PM, Yuanhan Liu wrote:
>>> +	if (vq->vhost_hlen == sizeof(struct virtio_net_hdr_mrg_rxbuf)) {
>>> +		*(struct virtio_net_hdr_mrg_rxbuf *)(uintptr_t)desc_addr = hdr;
>>> +	} else {
>>> +		*(struct virtio_net_hdr *)(uintptr_t)desc_addr = hdr.hdr;
>>> +	}
>> Thanks!
>> We might simplify this further. Just reset the first two fields flags
>> and gso_type.
> What's this "simplification" for? Don't even to say that we will add
> TSO support, which modifies few more files, such as csum_start: reseting
> the first two fields only is wrong here.

I know TSO before commenting, but at least in this implementation and
this specific patch, i guess zeroing two fields are enough.

What is wrong resetting only two fields?

>
> 	--yliu
>