From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 03B07C43458 for ; Thu, 9 Jul 2026 22:42:13 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4gx92D4BLcz2xWY; Fri, 10 Jul 2026 08:42:12 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=172.105.4.254 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1783636932; cv=none; b=UirObgHnEvqqx8AVW9uwWy0/bIQYK31ixzHvusMKH8BL1CajihFMhGbkA3+tPB3sfpYCsPKWCkqgvioA1HocKzQTiMlfDIzawL5qfFKfUf9fQ7ezPixdAuqbfao1o7FxPLnH0KpaSSj3rf/fUHv6q39mg2OzzqIbkCc8xOOECN2tjPhETMMibdLG94Lkr/ozxhHG51eGlYj+DJ775pMs45gs3OiTp1tYgFKH024IbMUJh8jssvQrqM9djujBXeG1ANhA+250QCZ4litPkUJd2/qrIElnaey4uTsF7l/4PstpYFrvaFVz4RK+bwgbzKHhClJOYzN5ObBN0uaMr7cq6g== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1783636932; c=relaxed/relaxed; bh=kZqBV0h2Ysco3x+okR7LyFcVjz1JoLkubJmF60s4PQE=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition:In-Reply-To; b=WRyKCgp2QNOojZ70XbnkDcQVT4ajMejrp41b3ZLKfgKu4jwVaDh9D1c0AknDvLF4s546UG3S+UJuYidaqis9gC3WT1WPiXlJFofwebvH/x31uQDFjHsGOLxpCvyAiKU7d/XJHOgiCTtXHOBVaOcglgbRRWSBmqM0COikhGEYDNnej0FWIi0wcSTdr058fBLOe5nxtARF3Kyw3Z2fFjoGi21h4Qqc94v0M9CMU0EecMNVcUCK6npG01vCrezDOjo1eYs5Qoi82YHS0RdhykEA7AOUfixIg5MBxVn0bfuPab4orQvlWvyCbkr4OYJW7bAiy/QrBrz/A9gQQy6A3rl/Lw== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=ifBPq5OZ; dkim-atps=neutral; spf=pass (client-ip=172.105.4.254; helo=tor.source.kernel.org; envelope-from=helgaas@kernel.org; receiver=lists.ozlabs.org) smtp.mailfrom=kernel.org Authentication-Results: lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=ifBPq5OZ; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=172.105.4.254; helo=tor.source.kernel.org; envelope-from=helgaas@kernel.org; receiver=lists.ozlabs.org) Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4gx92C3ZGWz2xKh for ; Fri, 10 Jul 2026 08:42:11 +1000 (AEST) Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 37AED600C3; Thu, 9 Jul 2026 22:42:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B59D31F000E9; Thu, 9 Jul 2026 22:42:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783636927; bh=kZqBV0h2Ysco3x+okR7LyFcVjz1JoLkubJmF60s4PQE=; h=Date:From:To:Cc:Subject:In-Reply-To; b=ifBPq5OZNsfvHF4IGu8LuJGf83QUd79cM+cHTY1CR8Batd5orrPwwwF192hm8OKYd mxS+g9rw5lKu1fwymJvdYXcpS0GJZtCUTIsa90eKNL6yhKyeG7IUbYyUgYsBCQa4Q8 RiMZM3j79jIPsd1tShNZnh6bk39zsjzNIFKQRSI4i0b10/rigC/GgUoYdEr1waLIwg 310VZDFIzWu/ML0A0K9i1SO2wDqQKO04VY7I8lFkM0XHE+uEXmMeAwQbM4pQr0qn7h PcPOtcSFV0xN9v/Nzi3T8ucFtkNPxsc0YPsxXLIr7qPxx9nItyfpLpCCimXOdKkNIh O9b2sLNqsJbwQ== Date: Thu, 9 Jul 2026 17:42:06 -0500 From: Bjorn Helgaas To: Yury Murashka Cc: bhelgaas@google.com, corbet@lwn.net, skhan@linuxfoundation.org, mahesh@linux.ibm.com, oohall@gmail.com, linux-pci@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH v2 0/2] PCI: Add boot options to disable DPC and AER recovery Message-ID: <20260709224206.GA913007@bhelgaas> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260709185429.627968-1-yurypm@arista.com> On Thu, Jul 09, 2026 at 06:54:27PM +0000, Yury Murashka wrote: > On large modular systems with a complex PCIe tree, the default kernel > AER recovery and DPC behavior could cause unexpected side effects. I can't tell what the actual issues are, but if there are kernel defects in this area, we should fix them. If this is to work around platform defects, maybe we need quirks to work around them automatically?