Re: segfault at start with latest qemu-kvm.git

[Jan Kiszka <jan.kiszka@web.de>]

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David S. Ahern wrote:
> On 03/03/2010 04:20 PM, Jan Kiszka wrote:
>> David S. Ahern wrote:
>>>
>>>
>>> On 03/03/2010 04:08 PM, Jan Kiszka wrote:
>>>> David S. Ahern wrote:
>>>>> With latest qemu-kvm.git I am getting a segfault at start:
>>>>>
>>>>> /tmp/qemu-kvm-test/bin/qemu-system-x86_64 -m 1024 -smp 2 \
>>>>>   -drive file=/images/f12-x86_64.img,if=virtio,cache=none,boot=on
>>>>>
>>>>> kvm_create_vcpu: Invalid argument
>>>>> Segmentation fault (core dumped)
>>>>>
>>>>>
>>>>> git bisect points to:
>>>>>
>>>>> Bisecting: 0 revisions left to test after this (roughly 0 steps)
>>>>> [52b03dd70261934688cb00768c4b1e404716a337] qemu-kvm: Move
>>>>> kvm_set_boot_cpu_id
>>>>>
>>>>>
>>>>> $ git show
>>>>> commit 7811d4e8ec057d25db68f900be1f09a142faca49
>>>>> Author: Marcelo Tosatti <mtosatti@redhat.com>
>>>>> Date:   Mon Mar 1 21:36:31 2010 -0300
>>>>>
>>>>>
>>>>> If I manually back out the patch it will boot fine.
>>>>>
>>>> Problem persists after removing the build directory and doing a fresh
>>>> configure && make? I'm asking before taking the bug (which would be
>>>> mine, likely) as I recently spent some hours "debugging" a volatile
>>>> build system issue.
>>>>
>>>> Jan
>>>>
>>> Before sending the email I pulled a fresh clone in a completely
>>> different directory (/tmp) to determine if it was something I
>>> introduced. I then went back to my usual location, unapplied the patch
>>> and it worked fine.
>> OK, that reason can be excluded. What's your host kernel kvm version?
>>
>> (Of course, the issue does not show up here. But virtio currently does
>> not boot for me - independent of my patch.)
>>
>> Jan
>>
> 
> Fedora Core 12,
> 
> Linux daahern-lx 2.6.31.12-174.2.22.fc12.x86_64 #1 SMP Fri Feb 19
> 18:55:03 UTC 2010 x86_64 x86_64 x86_64 GNU/Linux
> 

Reproduced after switching back to kvm-kmod-2.6.31, will debug.

Thanks,
Jan


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