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? 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] [<ffffffffb669c37b>] dump_stack+0x45/0x57 > [ 1.835799] [<ffffffffb6080d67>] warn_slowpath_common+0x97/0xe0 > [ 1.835806] [<ffffffffb6080dca>] warn_slowpath_null+0x1a/0x20 > [ 1.835813] [<ffffffffb603eeb4>] setup_local_APIC+0x284/0x340 > [ 1.835824] [<ffffffffb6d7c29d>] apic_bsp_setup+0x5b/0xb0 > [ 1.835832] [<ffffffffb6d79fa7>] > native_smp_prepare_cpus+0x23b/0x295 > [ 1.835842] [<ffffffffb6d6c1b9>] kernel_init_freeable+0xc7/0x20f > [ 1.835853] [<ffffffffb668d5c0>] ? rest_init+0x80/0x80 > [ 1.835860] [<ffffffffb668d5ce>] kernel_init+0xe/0xf0 > [ 1.835870] [<ffffffffb66a2fe2>] ret_from_fork+0x42/0x70 > [ 1.835877] [<ffffffffb668d5c0>] ? 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@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html��.n��������+%����;��w��{.n�����o�^n�r������&��z�ޗ�zf���h���~����������_��+v���)ߣ�