[dpdk-stable] [dpdk-dev] [PATCH] ethdev: avoid blocking telemetry callback for link status

[Stephen Hemminger]

On Tue, 19 Jan 2021 09:06:48 +0800
"Min Hu (Connor)" <humin29 at huawei.com> wrote:

> Hi, Bruce and all,
> 	Do you know the difference between "rte_eth_link_get" and
> "rte_eth_link_get_nowait"? I know they call funciton "link_update"
> with differenct parameter "wait_to_complete"(set 1 means wait, set 0
>   means not wait). But how to define the "wait" time, and why it shoud wait?
> 	On the further, What are the application scenarios of the two
> APIs?
> 

The default behavior of rte_eth_link_get (in some drivers) is to wait
for link to come up.  Many drivers don't do this. It seems mostly the
Intel ones that do.