looks like 2 processors runing the ddb at the same time...

On Mon, 1 Jul 2002, Matthew Dillon wrote:

>     I've been doing buildworld tests on an SMP build, 2-cpu 2550 w/ 2G of
>     ram configured.  It gets through two or three builds and then crashes.
> 
>     Unfortunately the crash seems to be completely undebuggable.  It drops
>     into DDB> but the serial port is completely screwed up and I can't type.
>     Hitting <return> gives me colons and semicolons at db> prompt.  Changing
>     baud rates does not seem to help.
> 
>     This has occured twice.  I am going to try dropping back to a standard
>     console to see if I can get better debugging.  I don't know if this is
>     KSE related or not.
> 
>     I've included the serial console output.
> 
>                                                   -Matt
> 
> 
> Fatal trap 12: page fault while in kernel mode
> cpuid = 0; lapic.id = 01000000
> fault virtual address   = 0xb
> fault code              = supervisor write, page not present
> instruction pointer     = 0xd35:0xe
> 
> Fatal trap 12: page fault while in kernel mode
> cpuid = 0; lapic.id = 01000000
> fault virtual addrepsasn        i=:
>                                    t nceode!    
>                                                         p=
>  
>  cs
>    puupeirdv =is o1r;  lraeapdi
> n                              c, .pidag e=  n0o0t00 0pr00es0e
> tDe
> niugnsgetrru("cptaioninc "p)oi
> Stopped at      Debugger+0x46:  xchgl   %ebx,in_Debugger.0
> db> ;;:   
> 
> 
> 


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