From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout.web.de (mout.web.de [212.227.15.14]) (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 A91AC946C; Thu, 27 Nov 2025 00:08:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=212.227.15.14 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764202102; cv=none; b=QkKyHVsAxAgDVrj0yyinL0amSmBYEGNJhPu1J2LwZD0RHsmCXecgheJWXsndOmzGwzOjRnzWGBH5EREzAMfdndScbk9GMnd3zc+85P0NeKZWADpJjY+xXjBtG8IY93vDj9LgD8JHzb9WwwqaLLS/oczIQoN8AYrMk1fMvbEK3qs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764202102; c=relaxed/simple; bh=vF2jJF51ar6bsXa6t7/iihINwHwWmBQcPf/CzXd6qnY=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=jC7vgr+GMn8DVdJ4KH0eUbmrSu/Pn6xCVWUUAK/pnkpUD4ufWOrbjwK0lbiVg1iT3mp+EsYlbOgySp1S9cnpFBjRgrYTlYvdx93+DWnBIssisVjjZTpZhYzVWJO3J/4KnjMEkpUKt8kdqabs2ZWLG7NfMPVAmMPnAjVgpt6Dvbw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=web.de; spf=pass smtp.mailfrom=web.de; dkim=pass (2048-bit key) header.d=web.de header.i=spasswolf@web.de header.b=o+D1zHLe; arc=none smtp.client-ip=212.227.15.14 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=web.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=web.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=web.de header.i=spasswolf@web.de header.b="o+D1zHLe" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=web.de; s=s29768273; t=1764202087; x=1764806887; i=spasswolf@web.de; bh=vF2jJF51ar6bsXa6t7/iihINwHwWmBQcPf/CzXd6qnY=; h=X-UI-Sender-Class:Message-ID:Subject:From:To:Cc:Date:In-Reply-To: References:Content-Type:MIME-Version:Content-Transfer-Encoding:cc: content-transfer-encoding:content-type:date:from:message-id: mime-version:reply-to:subject:to; b=o+D1zHLeKQHf9xPt/X3i+CfJuTIWAu0ueS2cTBAgzFP5PB29iDBJf0QJvca6vCpu /zQj2qyCLWZ+2zt1d7Vnm1vdIM+F1eRnHXncaNzdu6pfpOKpNrj5K1U+hHwssRP0J XGAfMrtVIAJysJORhEHZKjD+07PKCIY6P6n7JlDRngf6gag2kPGRk0zYxKfIg0tua NPHrZR223GZ88PyuknCxJVfmlR4CjU+fHOuAossw/tFNTBZRQKnSfCDoBmc9NV8yh tSSWxKS+C+d6YyKzk71c0tBg/y6U4oa3aGHjkTt1+U/Z6m3oE91hpDulSF1KG6ciZ PBBA+z9FTMml9tQdzg== X-UI-Sender-Class: 814a7b36-bfc1-4dae-8640-3722d8ec6cd6 Received: from [192.168.0.101] ([95.223.134.88]) by smtp.web.de (mrweb006 [213.165.67.108]) with ESMTPSA (Nemesis) id 1MbCI8-1vzgFT1ui8-00aUBi; Thu, 27 Nov 2025 01:08:07 +0100 Message-ID: <8273a7755f90a3e41782f1d820dd9f0c22be78b7.camel@web.de> Subject: Re: Crash during resume of pcie bridge due to infinite loop in ACPICA From: Bert Karwatzki To: "Rafael J. Wysocki" Cc: Christian =?ISO-8859-1?Q?K=F6nig?= , "Mario Limonciello (AMD) (kernel.org)" , linux-kernel@vger.kernel.org, linux-next@vger.kernel.org, regressions@lists.linux.dev, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org, "Rafael J . Wysocki" , acpica-devel@lists.linux.dev, Robert Moore , Saket Dumbre , spasswolf@web.de Date: Thu, 27 Nov 2025 01:08:05 +0100 In-Reply-To: References: <20251006120944.7880-1-spasswolf@web.de> <8edcc464-c467-4e83-a93b-19b92a2cf193@kernel.org> <4903e7c36adf377bcca289dbd3528055dc6cfb32.camel@web.de> <4a8302a0-209f-446a-9825-36cb267c1718@kernel.org> <25f36fa7-d1d6-4b81-a42f-64c445d6f065@amd.com> <1853e2af7f70cf726df278137b6d2d89d9d9dc82.camel@web.de> <26bf82303f661cdd34e4e8c16997e33eb21d1ee4.camel@web.de> <635b6cb19b5969bed7432dfd1cd651124e63aebb.camel@web.de> <18e472a0489ee5337465d5dc26685cebaf7c4f8d.camel@web.de> <3772b8f5-6d1a-403e-ad27-99a711e78902@kernel.org> <0cb75fae3a9cdb8dd82ca82348f4df919d34844d.camel@web.de> <0719d985-1c09-4039-84c1-8736a1ca5e2d@amd.com> <3f790ee59129e5e49dd875526cb308cc4d97b99d.camel@web.de> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.56.1-1+deb13u1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: 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Wysocki: >=20 >=20 > What may be happening, but this is just a theory, is that the > interpreter aborts the evaluation of a method due to an internal > timeout, essentially the control_state->control.loop_timeout check in > acpi_ds_exec_end_control_op() and that leads to a subsequent hard > failure like a deadlock. >=20 > This may be tested by increasing the ACPI_MAX_LOOP_TIMEOUT value, but > I'm not sure it's practical to try that. I don't think this the case here because ACPI_MAX_LOOP_TIMEOUT defaults to= =20 30s and the walk loop until the crash only lasts ~2s. Bert Karwatzki