Re: Guest crashes with 068 user-space, works with 066

[Avi Kivity <avi@qumranet.com>]

Damjan wrote:
> Strange situation, I have a Ubuntu JeOS image that crashes with this
> error when started by the kvm-068 user-space. Bellow is the trace from 
> the kernel...
>
> The same image, works with:
> - kvm-066 user space, kvm-068 kernel module (on 2.6.24 and 2.6.25)
> - kvm-066 user space, vanilla kernel module (from 2.6.24 and 2.6.25)
> (on my x60s laptop, 1GB ram, L2400 CoreDuo cpu, 
>  ArchLinux gcc-4.3.0 and gcc-3.4.6 glibc 2.7, 32bit)
>
> More strange, the same image works fine with both kvm-068 user space and 
> kvm-068 kernel module on my Slackware-12.0 desktop 
> (Q6600 cpu gcc-3.4.6 glibc-2.5 kernel-2.6.25, 32bit).
>
> [    6.279345] Code: a9 3d c0 8d 44 24 08 e8 06 fc ff ff b8 bc a9 3d c0 e8 3c a7 16 00 8b 04 24 83 c4 10 5b 5e 5f 5d c3 90 56 89 c6 53 b8 a4 a9 3d c0 <0f> 0d 08 90 89 f0 e8 5c f3 ff ff 85 c0 89 c3 74 66 b8 a4 a9 3d
>   

   0:   0f 0d 08                prefetchw (%rax)


3Dnow! got accidentally exposed to the guest.  kvm-69 will disable it again.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.


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