From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yb1-f180.google.com (mail-yb1-f180.google.com [209.85.219.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4302D2E36F8; Fri, 1 Aug 2025 21:44:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.180 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754084658; cv=none; b=fv00PbwALLrnZL1d2c5RERtLBmEiqf5JNzW97iOxUoXNRSytx2zSBUTlu7sBTtoVTkHQ2oPq0i0Wb0rgHnJXmun9sAh0LRkwxvVrZZo3HfMJXI/0Og2BpQq75G6chZ8/3zgbifWFBM2AZIbbz+FhzLfOzqv1s70K8rLoObYHDDY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754084658; c=relaxed/simple; bh=TugDInWfzLtuHmQ5NgSA7Tisgx2UotnZn+XmrZxxWTU=; h=Date:From:To:Cc:Message-ID:In-Reply-To:References:Subject: Mime-Version:Content-Type; b=CM1eVDDFyNAXOO8MxyoxJYlY0it607bNabuKWNJOo5mTCgXyAUtskeoxiLvwi/3lAZtCahd9fd7CmF4GdqTgduWaz7FbYr7b9+OwQz2GD2ViV7wmph0F9x0qlzoAfR3cgMtEHUIpe4/w4slq3+TkK8/5AN3Ug+fFlZ+Mb2B7Rpk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=M4zSFKVM; arc=none smtp.client-ip=209.85.219.180 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="M4zSFKVM" Received: by mail-yb1-f180.google.com with SMTP id 3f1490d57ef6-e75668006b9so1399104276.3; Fri, 01 Aug 2025 14:44:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1754084656; x=1754689456; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:subject:references :in-reply-to:message-id:cc:to:from:date:from:to:cc:subject:date :message-id:reply-to; bh=K76Y2KN/aWyarE1AwOC1zR3geasJuQAhmoAIi56PhCE=; b=M4zSFKVMizh7x86Wow8biEjSgeRq5KNNramecgU3p7qYMIqBSHoVgU3d/dGedJpWZD iKKHnmznXm3ecqRH4zNIX69HedUe562DNecnS3stvYylKMf8ddBhzb8ZiqVuCEacDKwR rOF+hfchgnKoRyLZegJDcdMHuTQR1GcnJMt9g7YC0ipYuhTYRlNdTCk+4nih5UZSCMoV J+CxpVCcR3k5lsnMogFkzPhdMe7rnUctT5afVvWRcbNAKmq5Rhyk+ZmkLyYl9wkvyu/g 0Phvc3aYfiRFzY35ee1at4XtetswDp/1vtv6DVQslQgMB7pBKnUDHbZ9SeStn9Ig8Tnb cSZQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1754084656; x=1754689456; h=content-transfer-encoding:mime-version:subject:references :in-reply-to:message-id:cc:to:from:date:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=K76Y2KN/aWyarE1AwOC1zR3geasJuQAhmoAIi56PhCE=; b=dt5dB4XyLmpiDjs177Arwg+EGlQhZVfNSjpPTqW+CKDhuR+Bzzuq3dJX8OIFLtNPTB Ok9xBTHpXVW5bFvQFP8Jzu4Xrb1wiE9xJ/NVOCX8Hd8SrJDYmcAzmL8cpUmbaVb8103N EAkUPS7HgQVN1DUiVWKxn11fDFkaTun8yJnsQwTuUX7BkOmvtQqX9Jirh4fXAQ3Djj0C lptXRnBp3omtQs+luHleRmbQ0gFI+p8TtfTs02uEAzuDq0wT56X6b7GKwumAm9Ej2Wfn JSh6oAtKG0O3vcONMkzlGHYox/6D0aELR7Crmrm9OBPbn0cC30nJsmYVsxGecU0Y0W3I UdEQ== X-Forwarded-Encrypted: i=1; AJvYcCUPmGdQAQeTnOUqY3cSvvkfS3l+BjsgEKkDuzAtI4v0yNLlXDkirhDfste6GJ1I/MiZLYISdupcTihzj0Lb7jI=@vger.kernel.org, AJvYcCWBCBHNMVef3gLRMzxKQvqruV8PuagxQKkxCkMQVmqtYsHw0QPtNj2NAflCaiUYQ02l6kB16Q8O@vger.kernel.org X-Gm-Message-State: AOJu0Yxm8L+rczNQEPr+E3Xzfz0/C+Wpc89NpeXilFttoeweq8IMrJLj /XF7JYpRkCarkEZ0Z7z64HvmA+4IbfM0Ojk9Qx7ZLJ/lf/DDAep2Rcv2 X-Gm-Gg: ASbGncuCP6R059a5BnRO/27ezXNwqz5EAxJoFcZC7PhK0dF/h4lFNdQTtEbe9YFGv9L s8d1i0QtpA3Vs1oaCucWMT4H7IyJJE6VC9HnFS9DfUoPw0CoAFggj0eo4vrkHYKEhVt8J+8845k /1ByxPxxIPnNpItThYR/CtryBxImL0SRDb+AqqrryONvlRq+eUDV0MubByyYVPVqTfKf+GUAw29 lYm1lnjwBzp3rjpEc9s/2nWohGEAKf79ujqas9uwrAHj4yYPrpfg3AEm7md/KTkiIPLddzHe3sQ fa9MV8i6jZSOjNZmZ9h05XMgnF+bNpbLHs5xkn3uLwCU4nbjEdG5hjV5nhUWGa0Ok+lNoGg7yf3 CI9HgT4aNqOfnk3H9ltiEEzAOyP659VzR6BVui+xz5eC/W1/SfA0vik3RTwa0JCDJhU62bQ== X-Google-Smtp-Source: AGHT+IGewaD37pUuA1PuA8zaHerjPVMCnUrtjn2yXhbuyQnF7Y7/8x/fFhfwly9JQGMuzScI12rMiA== X-Received: by 2002:a05:6902:12c6:b0:e8b:3e67:b90c with SMTP id 3f1490d57ef6-e8fee10857amr1720026276.16.1754084656121; Fri, 01 Aug 2025 14:44:16 -0700 (PDT) Received: from localhost (23.67.48.34.bc.googleusercontent.com. [34.48.67.23]) by smtp.gmail.com with UTF8SMTPSA id 3f1490d57ef6-e8fd3860b42sm1813579276.25.2025.08.01.14.44.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Aug 2025 14:44:15 -0700 (PDT) Date: Fri, 01 Aug 2025 17:44:15 -0400 From: Willem de Bruijn To: Jakub Kicinski , Willem de Bruijn Cc: davem@davemloft.net, netdev@vger.kernel.org, edumazet@google.com, pabeni@redhat.com, andrew+netdev@lunn.ch, horms@kernel.org, shuah@kernel.org, willemb@google.com, matttbe@kernel.org, linux-kselftest@vger.kernel.org Message-ID: <688d352f2fc3b_2e527e294d5@willemb.c.googlers.com.notmuch> In-Reply-To: <20250801140557.53a36012@kernel.org> References: <20250801181638.2483531-1-kuba@kernel.org> <688d2af39aff_2e1a6829416@willemb.c.googlers.com.notmuch> <20250801140557.53a36012@kernel.org> Subject: Re: [PATCH net] selftests: net: packetdrill: xfail all problems on slow machines Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Jakub Kicinski wrote: > On Fri, 01 Aug 2025 17:00:35 -0400 Willem de Bruijn wrote: > > Jakub Kicinski wrote: > > > We keep seeing flakes on packetdrill on debug kernels, while > > > non-debug kernels are stable, not a single flake in 200 runs. > > > Time to give up, debug kernels appear to suffer from 10msec > > > latency spikes and any timing-sensitive test is bound to flake. > > > > > > Signed-off-by: Jakub Kicinski > > > > Reviewed-by: Willem de Bruijn > > I should have added "Willem was right" 'cause you suggested this > a while back. But didn't know how to phrase it in the commit msg :) Ha, did I? I was hoping that the short allow-list would work. But if latency spikes can happen anytime, then that clearly not.