Re: 32-bit FreeBSD under 64-bit KVM

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

Aurelien Jarno wrote:
>> Can you try turning the '#undef AUDIT' to '#define AUDIT' in mmu.c?  
>> Also, change 'int dbg = 1' to 'int dbg = 0' in the same file.  Note kvm 
>> will be very slower after this.  dmesg will show any issues (issue a 
>> 'echo 9 > /proc/sysrq-trigger' to make sure all messages are shown)
>>
>>     
>
> Yep I confirm it is very slow, especially when your tty0 device is
> actually a serial port running at 9600 bauds!
>
> I also got some problems, as it seems logging so much data slowed down
> the machine, including the emulated machine. The segmentation violation
> message disappeared, but the OS was like in an endless loop. So the
> problem _may_ be due to a race condition.
>
> After a lot of tries, I found that I was able to get the segmentation
> violation by sending the kernel log to another machine. The full log is
> available on http://temp.aurel32.net/kvm-gnu_kfreebsd32.log.bz2. But I
> don't know what to look for in a such big log.
>   

Are you sure you set 'dbg = 0'?  There aren't supposed to be any logs, 
except if an error is found during audit (that's what the '#define 
AUDIT' is for).


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


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