linux-kernel - Re: [PATCH net] net: xilinx: axienet: Schedule NAPI in two steps

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Message-ID: <8ee8a13f-8308-42af-86a6-610bcde5f7f3@linux.dev>
Date: Thu, 12 Sep 2024 12:07:54 -0400
From: Sean Anderson <sean.anderson@...ux.dev>
To: Jakub Kicinski <kuba@...nel.org>
Cc: Radhey Shyam Pandey <radhey.shyam.pandey@....com>,
 "David S . Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
 netdev@...r.kernel.org, Robert Hancock <robert.hancock@...ian.com>,
 linux-kernel@...r.kernel.org, Michal Simek <michal.simek@....com>,
 linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH net] net: xilinx: axienet: Schedule NAPI in two steps

On 9/12/24 11:43, Jakub Kicinski wrote:
> On Thu, 12 Sep 2024 10:23:06 -0400 Sean Anderson wrote:
>> __napi_schedule_irqoff selects between __napi_schedule and
>> ____napi_schedule based on whether PREEMPT_RT is enabled. Is there some
>> other way to force IRQ threading?
> 
> I think so, IIRC threadirqs= kernel boot option lets you do it.
> I don't remember all the details now :( LMK if I'm wrong

Hm, maybe __napi_schedule_irqoff should be updated to take that into
account. I will resend without this change.

--Sean