From patchwork Thu Jan 27 01:43:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Long Li X-Patchwork-Id: 12726056 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 21409C433FE for ; Thu, 27 Jan 2022 01:43:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234645AbiA0Bnm (ORCPT ); Wed, 26 Jan 2022 20:43:42 -0500 Received: from linux.microsoft.com ([13.77.154.182]:50024 "EHLO linux.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234639AbiA0Bnm (ORCPT ); Wed, 26 Jan 2022 20:43:42 -0500 Received: by linux.microsoft.com (Postfix, from userid 1004) id B977B20B6C61; Wed, 26 Jan 2022 17:43:41 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com B977B20B6C61 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxonhyperv.com; s=default; t=1643247821; bh=N7YZd3jrpz266OVuKT55Gyq8urp7qTk1xIhBOfcbbZg=; h=From:To:Cc:Subject:Date:From; b=LcfALtu3gqigSlR3ZX0UApBkkcw3o5D5EvnpijSepTZKiTS5LY/gr7qcVfi7PkhB1 dLq91CjQJZPqQ7WTk13+pRHVEfBRFxFaXLn79E6RiRYpvkwjYQqREDVnAZeI7IlLZr 0HsLqmhZhvK/0R1iX/CotMpcjAIiF9WgKLLbOX0M= From: longli@linuxonhyperv.com To: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, paekkaladevi@microsoft.com Cc: Long Li Subject: [Patch v4] PCI: hv: Fix NUMA node assignment when kernel boots with custom NUMA topology Date: Wed, 26 Jan 2022 17:43:34 -0800 Message-Id: <1643247814-15184-1-git-send-email-longli@linuxonhyperv.com> X-Mailer: git-send-email 1.8.3.1 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Long Li When kernel boots with a NUMA topology with some NUMA nodes offline, the PCI driver should only set an online NUMA node on the device. This can happen during KDUMP where some NUMA nodes are not made online by the KDUMP kernel. This patch also fixes the case where kernel is booting with "numa=off". Fixes: 999dd956d838 ("PCI: hv: Add support for protocol 1.3 and support PCI_BUS_RELATIONS2") Signed-off-by: Long Li Reviewed-by: Michael Kelley Signed-off-by: Long Li Reviewed-by: Michael Kelley Tested-by: Purna Pavan Chandra Aekkaladevi Acked-by: Lorenzo Pieralisi --- Change log: v2: use numa_map_to_online_node() to assign a node to device (suggested by Michael Kelly ) v3: add "Fixes" and check for num_possible_nodes() v4: fix commit message format drivers/pci/controller/pci-hyperv.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c index 20ea2ee330b8..ae0bc2fee4ca 100644 --- a/drivers/pci/controller/pci-hyperv.c +++ b/drivers/pci/controller/pci-hyperv.c @@ -2155,8 +2155,17 @@ static void hv_pci_assign_numa_node(struct hv_pcibus_device *hbus) if (!hv_dev) continue; - if (hv_dev->desc.flags & HV_PCI_DEVICE_FLAG_NUMA_AFFINITY) - set_dev_node(&dev->dev, hv_dev->desc.virtual_numa_node); + if (hv_dev->desc.flags & HV_PCI_DEVICE_FLAG_NUMA_AFFINITY && + hv_dev->desc.virtual_numa_node < num_possible_nodes()) + /* + * The kernel may boot with some NUMA nodes offline + * (e.g. in a KDUMP kernel) or with NUMA disabled via + * "numa=off". In those cases, adjust the host provided + * NUMA node to a valid NUMA node used by the kernel. + */ + set_dev_node(&dev->dev, + numa_map_to_online_node( + hv_dev->desc.virtual_numa_node)); put_pcichild(hv_dev); }