Re: [ANNOUNCE] kvm-51 release

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

david ahern wrote:
> The patch worked for me -- rhel4 smp guests boot fine on stock RHEL5 hosts, both 32-bit and 64-bit.
>
>   

Excellent.  I had a premonition so it is already committed.

Do note that smp_call_function_mask() emulation is pretty bad in terms 
of performance on large multicores.  On a dual code it's basically 
equivalent to mainline, I guess it's okay for four-way, but above 
four-way you will need either mainline or a better 
smp_call_function_mask() (which is nontrivial but doable).

> david
>
>
> Avi Kivity wrote:
>   
>> david ahern wrote:
>>     
>>> In RHEL 5.1 <linux/notifier.h> defines:
>>>
>>> #define CPU_TASKS_FROZEN    0x0010
>>>
>>> #define CPU_ONLINE_FROZEN   (CPU_ONLINE | CPU_TASKS_FROZEN)
>>> #define CPU_DEAD_FROZEN     (CPU_DEAD | CPU_TASKS_FROZEN)
>>>
>>> which means in kvm-51/kernel/external-module-compat.h the '#ifndef
>>> CPU_TASKS_FROZEN' needs to have a case. For my purposes, I just moved
>>> up the endif around what was defined.
>>>   
>>>       
>> I committed a change which renders this unnecessary.  Will be part of
>> kvm-52.
>>
>>     
>>> With that change, kvm-51 compiles. I am still seeing 32-bit SMP guests
>>> hang on boot for both 32-bit and 64-bit hosts (again running RHEL5.1).
>>>   
>>>       
>> I still don't.  Can you test the attached patch?
>>
>>
>>
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-- 
error compiling committee.c: too many arguments to function


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