On Thu, Nov 24, 2011 at 04:03:55PM -0200, Luiz Capitulino wrote: > Avi, >
I have the same panic and the same bisection result. It doesn't happen with recent (3.2.0 rc1 and rc3) kernels. > I'm getting the following panic very early on boot on a F16 VM (latest > qemu.git head 40897c9): > > [ 0.068018] Kernel panic - not syncing: Boot APIC ID in local APIC > unexpected (-1 vs 0) > [ 0.070006] Pid: 1, comm: swapper Not tainted 3.1.0-7.fc16.x86_64 #1 > [ 0.071004] Call Trace: > [ 0.072035] [<ffffffff814acb8e>] panic+0x91/0x1a5 > [ 0.073027] [<ffffffff81b831ca>] native_smp_prepare_cpus+0x24c/0x300 > [ 0.075010] [<ffffffff81b76c0d>] kernel_init+0x85/0x158 > [ 0.075993] [<ffffffff810527eb>] ? schedule_tail+0x27/0x6c > [ 0.076017] [<ffffffff814be5f4>] kernel_thread_helper+0x4/0x10 > [ 0.077022] [<ffffffff81b76b88>] ? start_kernel+0x3b6/0x3b6 > [ 0.078009] [<ffffffff814be5f0>] ? gs_change+0x13/0x13 > > After some debugging and I found out that this only happens when '-cpu host' > is passed, and according to git bisect it's caused by the following commit: > > commit 66e3dd9282141b5ae75637c9676002cf3ceeb988 > Author: Avi Kivity <a...@redhat.com> > Date: Wed Nov 9 15:44:36 2011 +0200 > > i386: derive '-cpu host' from KVM_GET_SUPPORTED_CPUID > > Not sure if this is important, but here's procinfo information about > one of my host's cpus: > > processor : 0 > vendor_id : GenuineIntel > cpu family : 6 > model : 23 > model name : Intel(R) Core(TM)2 Duo CPU T9600 @ 2.80GHz > stepping : 6 > cpu MHz : 2801.000 > cache size : 6144 KB > physical id : 0 > siblings : 2 > core id : 0 > cpu cores : 2 > apicid : 0 > initial apicid : 0 > fpu : yes > fpu_exception : yes > cpuid level : 10 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov > pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm > constant_tsc arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor > ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 lahf_lm tpr_shadow vnmi > flexpriority > bogomips : 5585.87 > clflush size : 64 > cache_alignment : 64 > address sizes : 36 bits physical, 48 bits virtual > power management: >
