netdev - Re: [PATCH net v2 0/3] net: prevent deadlocks and mis-configuration with per-NAPI threaded config

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Message-ID: <aJf8_ypOuSrsQnIM@MacBook-Air.local>
Date: Sat, 9 Aug 2025 18:59:27 -0700
From: Joe Damato <joe@...a.to>
To: Jakub Kicinski <kuba@...nel.org>
Cc: davem@...emloft.net, netdev@...r.kernel.org, edumazet@...gle.com,
	pabeni@...hat.com, andrew+netdev@...n.ch, horms@...nel.org,
	willemdebruijn.kernel@...il.com, skhawaja@...gle.com,
	sdf@...ichev.me, shuah@...nel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH net v2 0/3] net: prevent deadlocks and mis-configuration
 with per-NAPI threaded config

On Fri, Aug 08, 2025 at 05:12:02PM -0700, Jakub Kicinski wrote:
> Running the test added with a recent fix on a driver with persistent
> NAPI config leads to a deadlock. The deadlock is fixed by patch 3,
> patch 2 is I think a more fundamental problem with the way we
> implemented the config.
> 
> I hope the fix makes sense, my own thinking is definitely colored
> by my preference (IOW how the per-queue config RFC was implemented).

Maybe it's too late now, but I am open to revisiting how the whole per-queue
NAPI config works after a conversation we had a couple months ago (IIRC ?).

I think you had proposed something that made sense to me at the time (although
I can't recall what that was or what thread that was in).