Re: KVM oops in svm_vcpu_run with 2.6.24-rc7

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

Andi Kleen wrote:
> On Wednesday 23 January 2008 12:28:06 Avi Kivity wrote:
>   
>> Andi Kleen wrote:
>>     
>>> While starting a kernel
>>>
>>> Unable to handle kernel NULL pointer dereference at 0000000000000008 RIP:
>>>  [<ffffffff885698fd>] :kvm_amd:svm_vcpu_run+0x35/0x30d
>>>       
>> Can you disassemble svm_vcpu_run() so we see where this ist
>>     
>
> Pretty much at the beginning. It's the first reference of the first argument
>
>
> 00000000000008c8 <svm_vcpu_run>:
>      8c8:       65 8b 0c 25 24 00 00    mov    %gs:0x24,%ecx
>      8cf:       00 
>      8d0:       48 63 c1                movslq %ecx,%rax
>      8d3:       48 89 fe                mov    %rdi,%rsi
>      8d6:       48 c7 c2 00 00 00 00    mov    $0x0,%rdx
>      8dd:       48 8b 04 c5 00 00 00    mov    0x0(,%rax,8),%rax
>      8e4:       00 
>      8e5:       48 8b 40 08             mov    0x8(%rax),%rax
>      8e9:       48 8b 3c 02             mov    (%rdx,%rax,1),%rdi
>      8ed:       48 8b 86 f0 0d 00 00    mov    0xdf0(%rsi),%rax
>      8f4:       c6 40 5c 00             movb   $0x0,0x5c(%rax)
>      8f8:       39 4e 40                cmp    %ecx,0x40(%rsi)
>      8fb:       75 0d                   jne    90a <svm_vcpu_run+0x42>
>      8fd:       48 8b 47 08             mov    0x8(%rdi),%rax                
>   

No, %rdi now points at per_cpu(svm_data, raw_smp_processor_id()); the 
instruction is referencing asid_generation.

Have you hotplugged cpus on this machine?  Maybe via suspend/resume?

-- 
error compiling committee.c: too many arguments to function


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