From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout-p-102.mailbox.org (mout-p-102.mailbox.org [80.241.56.152]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C0E5C375F65; Mon, 5 Oct 2026 22:21:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=80.241.56.152 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791238913; cv=none; b=ofwA3EiYJSBU9KYuwhSHvdZEKajEm5VOZjd0DrPaiWBd/MoZPj29szUrGdnN2yYB90NQ4IZAvOQy7Ezg2Y6yRWpkGsnK/qcOjOpUzJk+Lna6R1LGcly9NyPTpFkmlmqR1fI3FwsWS70HymGD2OIA8cztQkBPVDHEu+VHbH2WQqI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791238913; c=relaxed/simple; bh=EEAP5xIM9eAgC8Dtzfa0IWh74VGqveuvZ9DJ2QjMub4=; h=Date:From:To:Cc:Message-ID:In-Reply-To:References:Subject: MIME-Version:Content-Type; b=l2I8raxC8QUNdrBjD9FiA5QPqdZR3ipuyjniZAnZA7cyCXNwFE6sU90USpvyLrtRXnQabF7hpAZL1cE74UvdvwWQMBs0EftcBVIsEQjQhAkSUZ5bk/LZZKgRXhV8Pkc/OVPpouqtjfxtmEuKKNaAuG4RuZzYwv7kAVb7T/aWslM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=bojanowski.me; spf=pass smtp.mailfrom=bojanowski.me; dkim=pass (2048-bit key) header.d=bojanowski.me header.i=@bojanowski.me header.b=WzxsUFCx; arc=none smtp.client-ip=80.241.56.152 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=bojanowski.me Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bojanowski.me Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bojanowski.me header.i=@bojanowski.me header.b="WzxsUFCx" Received: from smtp1.mailbox.org (smtp1.mailbox.org [10.196.197.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mout-p-102.mailbox.org (Postfix) with ESMTPS id 4hzDPv5hzHzKp1y; Tue, 06 Oct 2026 00:21:39 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bojanowski.me; s=MBO0001; t=1791238899; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=xZyWaEt+MH9XzVtchopePvqBx/e5d+uLxhFpBKF5Rro=; b=WzxsUFCx7fljUja24xgSgRQo498gsXAqUVsyETK4UY+MvVzd8PjUE9SE/c7D0fFEQQRKIj iKRflCph6A5uYUMw08hYcSzWfql2xfda7Tzka13AffnA++WHRB+YiXo6faiulPu3pwGhDk tQfdFnpb/OIqwfnQnKruqX87EYiw1lazncSxE5I65HTocN0miYyEEfl0X0EacnWe7Tgdqy Po9P3y+LmevdoR0WBth5TUDMaLNd1haIKKQlPjHATbu67N2XdJKOLgyaP4W1hEhjLK9RCV 7ucsSNp8HA7MehCyUJxzd+xEU6mmbivlts/R7taBC2pcBsbJwAM/Lsz45zAbLg== Date: Tue, 6 Oct 2026 00:21:37 +0200 (CEST) From: Tomasz Bojanowski To: Thorsten Leemhuis , Bjorn Helgaas , linux-pci@vger.kernel.org Cc: "Maciej W. Rozycki" , =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= , Andreas Wild , linux-kernel@vger.kernel.org, Linux kernel regressions list Message-ID: <1140966133.1231391.1791238897910@app.mailbox.org> In-Reply-To: <22e0563e-afcd-44f5-9d87-f0b2a637038e@leemhuis.info> References: <20260923191357.7410-1-tomasz@bojanowski.me> <22e0563e-afcd-44f5-9d87-f0b2a637038e@leemhuis.info> Subject: Re: PCI: failed link retraining quirk costs 1 s per empty AMD Promontory 21 port Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Priority: 3 Importance: Normal > 04.10.2026 17:29 CEST Thorsten Leemhuis napis= a=C5=82(a): > Hmm, nobody replied afaics (or did I miss something), so it seems nobody > has an idea what's wrong here. So I guess you need to perform a git > bisection. Thanks for following up. You did not miss anything, there were no replies so far. I am not sure a bisection is possible though: I do not know of any kernel where this does not happen. I see the same 2 s delay on 7.1.x (openSUSE) and on 7.2.x (Fedora), and I believe it was already there on 6.19 and 7.0 as well, so I did not mean to report it as a regression, sorry if the report read that way. As far as I can tell the quirk simply behaves as written: LBMS is set on a port with no link, so the "broken device" branch is taken and the retrain times out. I would be grateful for a hint from the PCI folks on whether this is expected on empty ports. Thanks, Tomasz