From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 53A9F1A255A; Tue, 13 Aug 2024 16:43:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723567411; cv=none; b=tF4PH4EyUjXVkDzlikV5GpwgLZmJcu0jN10e8f2V3d7RQBT961RCfdnzoCpj0bHOQArmzXIu4zvFc51ImkLmdlN6ndI8Ggw8ZjA/uM0ws3rlfBFdyAa7gSpyQw910JJS5dDqaBR9Kl5PO4Hhcs+i6ZNjZPBWLrnO5C/7SzIj9tw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723567411; c=relaxed/simple; bh=RiYO5QgCiG46B5wMfDOn91P7Ne0jjaRilLFCxBkm9oc=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=VGzk4B390n9b6zmZ+modfv/sWeISMqnyY2mKHAi7pnwrArDcLbgJT0YQpSDzluBpyxscEuDGMjmadNgCU18ev3FmSZgDknJqKGd7nbKX/xijz3seecaiZXUcjCwRpGX0zmucoiIQRgTu4xpB10TV2ePA++MD01S/xDReyWHUivE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=RB98VEtL; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="RB98VEtL" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 76125C4AF0B; Tue, 13 Aug 2024 16:43:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1723567410; bh=RiYO5QgCiG46B5wMfDOn91P7Ne0jjaRilLFCxBkm9oc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=RB98VEtLU+c8RS00jyMQhUzcLUNRfjQcFL8ppmMAYx7tKDn5190sFuXoZR7MdfvMS oeDSx3tEbc+DR0g0nLs6lOTP4XnxO+2RL7bOWSdy5OOIokyWFkDxS57tnksjsUVn4c QKtntpKVqu+crcEu9CXO7J+GNIzqvALTKztHR7st/Gb7hnPFM6QMfAX9qKQKWaQqcn bdXpHGtAlroCMg+r8XtmJBHzfIJyONhKGjQIk6HDdjSqbXjvIEjrLVS4AdZk0cNznh 1hQnBO7nLmD2/ZA/Z19C62QQ8II6DjFvsX2/iVLd7sM5khnS4io7v5eNFdAudKMLQ/ Q8iC6UexbTsjw== Date: Tue, 13 Aug 2024 10:43:29 -0600 From: Rob Herring To: Bjorn Helgaas Cc: Amit Machhiwal , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-ppc@vger.kernel.org, Bjorn Helgaas , Lizhi Hou , Saravana Kannan , Vaibhav Jain , Nicholas Piggin , Michael Ellerman , Vaidyanathan Srinivasan , Kowshik Jois B S , Lukas Wunner , kernel-team@lists.ubuntu.com, Stefan Bader Subject: Re: [PATCH v3] PCI: Fix crash during pci_dev hot-unplug on pseries KVM guest Message-ID: <20240813164329.GA1180569-robh@kernel.org> References: <20240802183327.1309020-1-amachhiw@linux.ibm.com> <20240806200059.GA74866@bhelgaas> 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=us-ascii Content-Disposition: inline In-Reply-To: <20240806200059.GA74866@bhelgaas> On Tue, Aug 06, 2024 at 03:00:59PM -0500, Bjorn Helgaas wrote: > On Sat, Aug 03, 2024 at 12:03:25AM +0530, Amit Machhiwal wrote: > > With CONFIG_PCI_DYNAMIC_OF_NODES [1], a hot-plug and hot-unplug sequence > > of a PCI device attached to a PCI-bridge causes following kernel Oops on > > a pseries KVM guest: > > What is unique about pseries here? There's nothing specific to > pseries in the patch, so I would expect this to be a generic problem > on any arch. Only pseries does PCI hotplug with DT I think. It would happen if another system did though, but I think documenting the exact system is good. No reason we can't do both though. Rob