Re: [PATCH net] ixgbe: check return value of napi_complete_done()

[Eric Dumazet]

On 09/20/2018 04:43 PM, Song Liu wrote:
> 

> I tried to totally skip ndo_poll_controller() here. It did avoid hitting
> the issue. However, netpoll will drop (fail to send) more packets. 
>

Why is it failing ?

If you are under high memory pressure, then maybe if you absolutely want memory 
to send
netpoll packets, you want to grab all NAPI contexts as a way to prevent other 
cpus 
from feeding incoming packets to the host and add more memory pressure ;)