linux-kernel - [PATCH 0/2] x86, apic: Disable BSP if boot cpu is AP

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Date:	Thu, 29 Aug 2013 18:27:53 +0900
From:	HATAYAMA Daisuke <d.hatayama@...fujitsu.com>
To:	ebiederm@...ssion.com, vgoyal@...hat.com
Cc:	akpm@...ux-foundation.org, hpa@...ux.intel.com,
	kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
	jingbai.ma@...com
Subject: [PATCH 0/2] x86, apic: Disable BSP if boot cpu is AP

This is the patch series to address the issue that kdump 2nd kernel
now fails to wake up multiple CPUs.

This is based on 3.11-rc7.

I tested this patch series on x86. I used 2 cpus by specifying
nr_cpus=2 for the 2nd kernel. I checked both ACPI MADT and MP table
case; the former is default on my system and for the latter I did
acpi=off. I crashed the system both on BSP and AP by taskset -c {0,1}
sh -c "echo c > /proc/sysrq-trigger".

---

HATAYAMA Daisuke (2):
      x86, apic: Add boot_cpu_is_bsp() to check if boot cpu is BSP
      x86, apic: Disable BSP if boot cpu is AP


 arch/x86/include/asm/mpspec.h |    5 ++++-
 arch/x86/kernel/acpi/boot.c   |   11 ++++++++++-
 arch/x86/kernel/apic/apic.c   |   32 +++++++++++++++++++++++++++++++-
 arch/x86/kernel/devicetree.c  |    1 +
 arch/x86/kernel/mpparse.c     |   15 +++++++++++++--
 arch/x86/kernel/setup.c       |    2 ++
 arch/x86/platform/sfi/sfi.c   |    2 +-
 7 files changed, 62 insertions(+), 6 deletions(-)

-- 
Thanks.
HATAYAMA, Daisuke
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