Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965205AbeALTf4 (ORCPT + 1 other); Fri, 12 Jan 2018 14:35:56 -0500 Received: from Galois.linutronix.de ([146.0.238.70]:35481 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964998AbeALTfz (ORCPT ); Fri, 12 Jan 2018 14:35:55 -0500 Date: Fri, 12 Jan 2018 20:35:46 +0100 (CET) From: Thomas Gleixner To: Ming Lei cc: Jens Axboe , linux-block@vger.kernel.org, Christoph Hellwig , Christian Borntraeger , Stefan Haberland , linux-kernel@vger.kernel.org, Christoph Hellwig Subject: Re: [PATCH 1/2] genirq/affinity: assign vectors to all possible CPUs In-Reply-To: <20180112025306.28004-2-ming.lei@redhat.com> Message-ID: References: <20180112025306.28004-1-ming.lei@redhat.com> <20180112025306.28004-2-ming.lei@redhat.com> User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: On Fri, 12 Jan 2018, Ming Lei wrote: > From: Christoph Hellwig > > Currently we assign managed interrupt vectors to all present CPUs. This > works fine for systems were we only online/offline CPUs. But in case of > systems that support physical CPU hotplug (or the virtualized version of > it) this means the additional CPUs covered for in the ACPI tables or on > the command line are not catered for. To fix this we'd either need to > introduce new hotplug CPU states just for this case, or we can start > assining vectors to possible but not present CPUs. > > Reported-by: Christian Borntraeger > Tested-by: Christian Borntraeger > Tested-by: Stefan Haberland > Cc: linux-kernel@vger.kernel.org > Cc: Thomas Gleixner FWIW, Acked-by: Thomas Gleixner