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Message-ID: <09046dcc-a388-4703-83bb-9fa0c36af861@kernel.org>
Date: Fri, 1 Mar 2024 16:10:20 +0100
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Subject: Re: [PATCH net 10/10] selftests: mptcp: explicitly trigger the
 listener diag code-path
Content-Language: en-GB, fr-BE
To: Jakub Kicinski <kuba@kernel.org>, Mat Martineau <martineau@kernel.org>,
 Paolo Abeni <pabeni@redhat.com>
Cc: mptcp@lists.linux.dev, Geliang Tang <geliang@kernel.org>,
 "David S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>,
 Florian Westphal <fw@strlen.de>, Kishen Maloor <kishen.maloor@intel.com>,
 Shuah Khan <shuah@kernel.org>, Peter Krystad
 <peter.krystad@linux.intel.com>, Christoph Paasch <cpaasch@apple.com>,
 netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
 linux-kselftest@vger.kernel.org
References: <20240223-upstream-net-20240223-misc-fixes-v1-0-162e87e48497@kernel.org>
 <20240223-upstream-net-20240223-misc-fixes-v1-10-162e87e48497@kernel.org>
 <20240301063754.2ecefecf@kernel.org>
From: Matthieu Baerts <matttbe@kernel.org>
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Organization: NGI0 Core
In-Reply-To: <20240301063754.2ecefecf@kernel.org>
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Hi Jakub,

On 01/03/2024 15:37, Jakub Kicinski wrote:
> On Fri, 23 Feb 2024 17:14:20 +0100 Matthieu Baerts (NGI0) wrote:
>> From: Paolo Abeni <pabeni@redhat.com>
>>
>> The mptcp diag interface already experienced a few locking bugs
>> that lockdep and appropriate coverage have detected in advance.
>>
>> Let's add a test-case triggering the relevant code path, to prevent
>> similar issues in the future.
>>
>> Be careful to cope with very slow environments.
>>
>> Note that we don't need an explicit timeout on the mptcp_connect
>> subprocess to cope with eventual bug/hang-up as the final cleanup
>> terminating the child processes will take care of that.
> 
> Hi!
> 
> There's a failure in CI under debug after merging net and net-next 
> in diag.sh. Maybe because of the patch which lowered timeout?
> https://lore.kernel.org/all/20240223-upstream-net-next-20240223-misc-improvements-v1-8-b6c8a10396bd@kernel.org/

Thank you for this message!

I didn't have this error on my side, even without '-d SLUB_DEBUG_ON' we
do on top of the debug kconfig, but I see I can reproduce it on slower
environments. Indeed, it looks like it can be caused by that
modification. I will send a fix ASAP!

Cheers,
Matt
-- 
Sponsored by the NGI0 Core fund.