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Date: Mon, 4 May 2026 17:09:12 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Fernando Fernandez Mancera <fmancera@suse.de>
Cc: Alyssa Ross <hi@alyssa.is>, "David S. Miller" <davem@davemloft.net>,
 David Ahern <dsahern@kernel.org>, Eric Dumazet <edumazet@google.com>, Paolo
 Abeni <pabeni@redhat.com>, Simon Horman <horms@kernel.org>,
 netdev@vger.kernel.org, linux-kernel@vger.kernel.org, "Ricardo B .
 =?UTF-8?B?TWFybGnDqHJl?=" <rbm@suse.com>, Krzysztof Kozlowski
 <krzk@kernel.org>
Subject: Re: [PATCH v2] ipv6: default IPV6_SIT to m
Message-ID: <20260504170912.174235db@kernel.org>
In-Reply-To: <d299649e-d01e-451a-b604-76c8662f1ecc@suse.de>
References: <20260503192515.290900-2-hi@alyssa.is>
	<5f676587-fcdd-4704-9523-07a7fd98455a@suse.de>
	<878q9zdz6s.fsf@alyssa.is>
	<d299649e-d01e-451a-b604-76c8662f1ecc@suse.de>
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On Mon, 4 May 2026 17:01:43 +0200 Fernando Fernandez Mancera wrote:
> > Yes, it appears you're right.  I had only tested on ARM.  In that case,
> > perhaps it make sense to instead set this to m in the arm64 defconfig, to
> > preserve the previous situation, but I can also see the value in
> > reducing platform discongruity by letting it change to y on arm64 too.  
> 
> Changing it on arm64 defconfig would make sense to me too. We should 
> probably visit other configs that might be in the same situation. That 
> in my opinion would qualify a net tree fix as you proposed initially.

Right. I think the fix as posted makes sense. Tunnel drivers should 
be =m. If other arches default to =y that's likely an oversight.
Fedora and I suspect all other distros (and "prod kernels") set SIT=m.