From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yang Zhang Subject: Re: trace in arch/x86/kernel/apic/apic.c:1309 setup_local_APIC Date: Tue, 26 Jan 2016 19:39:28 +0800 Message-ID: <56A75AF0.1000407@gmail.com> References: <56A62863.2020408@profihost.ag> <1453772817.3912.6.camel@intel.com> <56A71EAA.6060109@profihost.ag> <56A746E6.3020201@gmail.com> <56A74DC2.5090606@profihost.ag> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Cc: "kvm@vger.kernel.org" , "qemu-devel@nongnu.org" To: Stefan Priebe - Profihost AG , "Han, Huaitong" Return-path: Received: from mail-pa0-f67.google.com ([209.85.220.67]:35594 "EHLO mail-pa0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965071AbcAZLjc (ORCPT ); Tue, 26 Jan 2016 06:39:32 -0500 Received: by mail-pa0-f67.google.com with SMTP id gi1so7879429pac.2 for ; Tue, 26 Jan 2016 03:39:32 -0800 (PST) In-Reply-To: <56A74DC2.5090606@profihost.ag> Sender: kvm-owner@vger.kernel.org List-ID: On 2016/1/26 18:43, Stefan Priebe - Profihost AG wrote: > > Am 26.01.2016 um 11:13 schrieb Yang Zhang: >> On 2016/1/26 15:22, Stefan Priebe - Profihost AG wrote: >>> Hi, >>> >>> Am 26.01.2016 um 02:46 schrieb Han, Huaitong: >>>> What is the host kernel version and host dmesg information? And does >>>> the problem exist when you use latest kernel and QEMU to replace old >>>> binary file? >>> >>> Guest and Host is both 4.1.15. You mean the complete dmesg output from >>> host? >>> >>> What do you mean with replace old binary file? I haven't tested Kernel >>> 4.4 as we use 4.1 as it is a long term stable kernel release. >> >> Have you seen this before? I mean use the old KVM like 3.10? > > Guest or host? To test with a guest would be quite easy. Downgrading the > host is very difficult not sure if the hw is supported. Host. Does the issue only exist on the Westmere CPU? > >> >>> >>> Stefan >>> >>>> On Mon, 2016-01-25 at 14:51 +0100, Stefan Priebe - Profihost AG wrote: >>>>> Hi, >>>>> >>>>> while running qemu 2.4 on whestmere CPUs i'm pretty often getting >>>>> this >>>>> one while booting: >>>>> [ 0.811645] Switched APIC routing to physical x2apic. >>>>> [ 1.835678] ------------[ cut here ]------------ >>>>> [ 1.835704] WARNING: CPU: 0 PID: 1 at >>>>> arch/x86/kernel/apic/apic.c:1309 setup_local_APIC+0x284/0x340() >>>>> [ 1.835714] Modules linked in: >>>>> [ 1.835724] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.1.15+72-ph >>>>> #1 >>>>> [ 1.835731] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), >>>>> BIOS rel-1.8.2-0-g33fbe13 by qemu-project.org 04/01/2014 >>>>> [ 1.835743] ffffffffb69ffcea ffff88042d5e3d68 ffffffffb669c37b >>>>> 0000000000000918 >>>>> [ 1.835754] 0000000000000000 ffff88042d5e3da8 ffffffffb6080d67 >>>>> ffff88042d5e3da8 >>>>> [ 1.835765] 0000000000000001 0000000000000000 0000000000008000 >>>>> 0000000000000000 >>>>> [ 1.835777] Call Trace: >>>>> [ 1.835789] [] dump_stack+0x45/0x57 >>>>> [ 1.835799] [] warn_slowpath_common+0x97/0xe0 >>>>> [ 1.835806] [] warn_slowpath_null+0x1a/0x20 >>>>> [ 1.835813] [] setup_local_APIC+0x284/0x340 >>>>> [ 1.835824] [] apic_bsp_setup+0x5b/0xb0 >>>>> [ 1.835832] [] >>>>> native_smp_prepare_cpus+0x23b/0x295 >>>>> [ 1.835842] [] kernel_init_freeable+0xc7/0x20f >>>>> [ 1.835853] [] ? rest_init+0x80/0x80 >>>>> [ 1.835860] [] kernel_init+0xe/0xf0 >>>>> [ 1.835870] [] ret_from_fork+0x42/0x70 >>>>> [ 1.835877] [] ? rest_init+0x80/0x80 >>>>> [ 1.835891] ---[ end trace bdbe630a8de2832c ]--- >>>>> [ 1.837613] Spurious LAPIC timer interrupt on cpu 0 >>>>> [ 1.837957] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1 >>>>> [ 1.939574] smpboot: CPU0: Intel Westmere E56xx/L56xx/X56xx >>>>> (Nehalem-C) (fam: 06, model: 2c, stepping: 01) >>>>> [ 1.939630] Performance Events: unsupported p6 CPU model 44 no PMU >>>>> driver, software events only. >>>>> [ 1.950868] KVM setup paravirtual spinlock >>>>> >>>>> Greets, >>>>> Stefan >>>>> -- >>>>> To unsubscribe from this list: send the line "unsubscribe kvm" in >>>>> the body of a message to majordomo@vger.kernel.org >>>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>> -- >>> To unsubscribe from this list: send the line "unsubscribe kvm" in >>> the body of a message to majordomo@vger.kernel.org >>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>> >> >> -- best regards yang