netdev - Re: [EXT] Re: [PATCH net-next 1/3] qede: add netpoll support for qede driver

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Date:   Sun, 17 Jan 2021 17:35:30 +0100
From:   Igor Russkikh <irusskikh@...vell.com>
To:     Jakub Kicinski <kuba@...nel.org>,
        Bhaskar Upadhaya <bupadhaya@...vell.com>
CC:     <netdev@...r.kernel.org>, Ariel Elior <aelior@...vell.com>
Subject: Re: [EXT] Re: [PATCH net-next 1/3] qede: add netpoll support for qede
 driver


> On Fri, 15 Jan 2021 01:06:08 -0800 Bhaskar Upadhaya wrote:
>> Add net poll controller support to transmit kernel printks
>> over UDP
> 
> Why do you need this patch? Couple years back netpoll was taught 
> how to pull NAPIs by itself, and all you do is schedule NAPIs.
> 
> All the driver should do is to make sure that when napi is called 
> with budget of 0 it only processes Tx completions, not Rx traffic.

Hi Jakub,

Thanks for the hint, we were not aware of that.

I see our driver may not handle zero budget accordingly. Will check.

But then, all this means .ndo_poll_controller is basically deprecated?

Regards,
   Igor