From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751122AbeBIMKT (ORCPT ); Fri, 9 Feb 2018 07:10:19 -0500 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:50688 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750945AbeBIMKS (ORCPT ); Fri, 9 Feb 2018 07:10:18 -0500 From: Baoquan He To: linux-kernel@vger.kernel.org, ebiederm@xmission.com Cc: mingo@kernel.org, tglx@linutronix.de, x86@kernel.org, douly.fnst@cn.fujitsu.com, joro@8bytes.org, uobergfe@redhat.com, prarit@redhat.com, Baoquan He Subject: [PATCH v3 0/5] x86/apic: Fix restoring boot irq mode in reboot and kexec/kdump Date: Fri, 9 Feb 2018 20:10:03 +0800 Message-Id: <20180209121008.28980-1-bhe@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org A regression bug was introduced in below commit. commit 522e66464467 ("x86/apic: Disable I/O APIC before shutdown of the local APIC") It caused the action to fail which we try to restore boot irq mode in reboot and kexec/kdump. Details can be seen in patch 0002. Warning can always be seen during kdump kernel boot on qemu/kvm platform. Our customer even saw casual kdump kernel hang once in ~30 attempts during stress testing of kdump on KVM machine. This is v3 post, patches are rearranged and changed according to Eric's suggestions. Baoquan He (5): x86/apic: Split out restore_boot_irq_mode from disable_IO_APIC x86/apic: Fix restoring boot irq mode in reboot and kexec/kdump x86/apic: Remove useless disable_IO_APIC x86/apic: Rename variable/function related to x86_io_apic_ops x86/apic: Set up through-local-APIC on boot CPU if 'noapic' specified arch/x86/include/asm/io_apic.h | 9 +++++---- arch/x86/include/asm/x86_init.h | 8 ++++---- arch/x86/kernel/apic/apic.c | 2 +- arch/x86/kernel/apic/io_apic.c | 16 ++++------------ arch/x86/kernel/crash.c | 3 ++- arch/x86/kernel/machine_kexec_32.c | 7 +++---- arch/x86/kernel/machine_kexec_64.c | 7 +++---- arch/x86/kernel/reboot.c | 3 ++- arch/x86/kernel/x86_init.c | 6 +++--- arch/x86/xen/apic.c | 2 +- drivers/iommu/irq_remapping.c | 4 ++-- 11 files changed, 30 insertions(+), 37 deletions(-) -- 2.13.6