netdev - Re: new splat

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Message-ID: <20250402094458.006ba2a7@kernel.org>
Date: Wed, 2 Apr 2025 09:44:58 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Stanislav Fomichev <stfomichev@...il.com>
Cc: Justin Iurman <justin.iurman@...ege.be>, Paolo Abeni
 <pabeni@...hat.com>, Alexei Starovoitov <alexei.starovoitov@...il.com>, bpf
 <bpf@...r.kernel.org>, Network Development <netdev@...r.kernel.org>
Subject: Re: new splat

On Tue, 1 Apr 2025 09:45:19 -0700 Stanislav Fomichev wrote:
> > Correct, I came to the same conclusion based on that trace. However, I can't
> > reproduce it with a PREEMPT kernel. It goes through without problem and the
> > output is (as expected), i.e., "lwtunnel_xmit(): recursion limit reached on
> > datapath".  
> 
> For me adding the following to the config did the trick:
> CONFIG_PREEMPT
> CONFIG_DEBUG_PREEMPT

Could you send a patch to set these in kernel/configs/debug.config ?