Re: [Qemu-devel] Segfault starting vcpu thread

[Jan Kiszka <jan.kiszka@siemens.com>]

On 2012-07-11 13:58, Avi Kivity wrote:
> On 07/11/2012 02:55 PM, Jan Kiszka wrote:
>> On 2012-07-11 13:46, Avi Kivity wrote:
>>> Current qemu-kvm master merged with latest upstream fails on startup:
>>>
>>> (gdb) bt
>>> #0  0x00007fdcd4a047a0 in kvm_vcpu_ioctl (env=0x0, type=-1071075694) at
>>> /home/tlv/akivity/qemu/kvm-all.c:1602
>>> #1  0x00007fdcd49c9fda in kvm_apic_enable_tpr_reporting
>>> (s=0x7fdcd75af6c0, enable=false) at
>>> /home/tlv/akivity/qemu/hw/i386/../kvm/apic.c:107
>>> #2  0x00007fdcd4993d71 in flush_queued_work (env=0x7fdcd75a0c70) at
>>> /home/tlv/akivity/qemu/cpus.c:680
>>> #3  0x00007fdcd4993e23 in qemu_wait_io_event_common (env=0x7fdcd75a0c70)
>>> at /home/tlv/akivity/qemu/cpus.c:694
>>> #4  0x00007fdcd4993f61 in qemu_kvm_wait_io_event (env=0x7fdcd75a0c70) at
>>> /home/tlv/akivity/qemu/cpus.c:725
>>> #5  0x00007fdcd499408c in qemu_kvm_cpu_thread_fn (arg=0x7fdcd75a0c70) at
>>> /home/tlv/akivity/qemu/cpus.c:757
>>> #6  0x00007fdcd2e72d14 in start_thread () from /lib64/libpthread.so.0
>>>
>>> APICCommonState::cpu_env in frame 1 is NULL.  I'm looking at it, but if
>>> you have a quick fix, all the better.
>>>
>>
>> I will try to reproduce. Is there a tree of the merge available? 
> 
> I just merged upstream into qemu-kvm master.  For some reason there were
> no conflicts.

A rare moment, I guess. ;)

> 
>> Any
>> specific command line or guest?
> 
> qemu-system-x86_64

Just did the same, but it's all fine here.

Jan

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