On Thu, Feb 24, 2011 at 12:17:40PM +0200, Avi Kivity wrote:
> On 02/24/2011 01:42 AM, Nikola Ciprich wrote:
>> Hello Avi et al,
>> seems like I've hit regression in 2.6.37:
>> 32bit SMP centos guest stopped booting, they just hang during initrd phase. (haven't tried
>> different distros)
>> UP guest are OK.
>> when I (forcibly) compiled kvm-kmod-2.6.36.2 and used it in 2.6.37, even
>> the SMP guests boot fine.
>> does somebody have a tip on where the problem could be, or should I bisect this?
>> I tried on 2 different machines, host is x86_64, qemu-kvm 0.13.0, 0.14.0.
>> If I shall provide more information (or bisect), please let me know.
>
> Bisect is of course great, if laborious. Meanwhile can you post 'info
> registers' for all cpus? Is the guest consuming cpu? kvm_stat output?
yes, it's eating 100% of one CPU core.
kvm_stat for few seconds (hunged guest is the only one running on the host):
kvm_entry 29327 9091
kvm_exit 29357 9090
kvm_inj_virq 24588 7609
kvm_apic_accept_irq 17146 5310
kvm_emulate_insn 12682 3931
kvm_apic 12530 3879
kvm_mmio 12525 3879
kvm_exit(APIC_ACCESS) 12525 3879
kvm_exit(HLT) 11262 3466
kvm_ioapic_set_irq 6532 2024
kvm_set_irq 6538 2024
kvm_pic_set_irq 6536 2024
kvm_exit(EXTERNAL_INTERRUPT) 4255 1300
kvm_ack_irq 2442 756
kvm_exit(PENDING_INTERRUPT) 1030 335
kvm_exit(IO_INSTRUCTION) 313 104
kvm_pio 312 104
kvm_age_page 18 6
kvm_exit(EPT_VIOLATION) 14 4
kvm_page_fault 12 4
kvm_exit(INVALID_STATE) 4 0
kvm_exit(VMLAUNCH) 3 0
kvm_exit(CPUID) 3 0
kvm_exit(DR_ACCESS) 2 0
kvm_exit(MSR_READ) 2 0
kvm_exit(PAUSE_INSTRUCTION) 1 0
info registers:
EAX=00000000 EBX=6a000000 ECX=0000000a EDX=000f41a8
ESI=000f41a8 EDI=00000000 EBP=c0690320 ESP=c0769f58
EIP=c042d137 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
I'll wait a bit with bisect whether You'll spot some obvious bug or not ;)
thanks for Your time!
PS: I still owe You the kvm_stat comparison about this slow windows chkdsk problem,
I'm aware of it, I just had to postpone this due to more urgent matters :(
but I'll get back to it sooner or later..