Re: 32-bit FreeBSD under 64-bit KVM

[Aurelien Jarno <aurelien-rXXEIb44qovR7s880joybQ@public.gmane.org>]

On Wed, Mar 07, 2007 at 04:34:02PM +0200, Avi Kivity wrote:
> Aurelien Jarno wrote:
> >>>  
> >>>      
> >>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).
> >>
> >>    
> >
> >Oh sorry, I did that wrong.
> >
> >I have tried with dbg = = 0 and #define AUDIT, and it is indeed far less
> >verbose.
> >
> >However I experienced the same problem as with DEBUG, ie when the guest
> >is running slower (in that case due to AUDIT), the problem get away and
> >the guest is running correctly, but very slowly.
> >
> >I guess it will be difficult to debug such a thing, so I think I will
> >have to wait until another way to trigger the bug is found.
> >  
> 
> It shouldn't say anything under audit unless something is wrong.  Can 
> you post your dmesg?


Yep. Here are what I get in my dmesg. The lines below are output when
the kernel is started (just after the bootloader):

Mar  3 16:50:35 joule kernel: assertion failed /usr/local/src/kvm-15/kernel/mmu.c:722: (gpa & HPA_ERR_MASK) == 0
Mar  3 16:50:35 joule kernel: audit error: (pre page fault) levels 2 gva 444000 gpa ffffffffffffffff hpa ffffffffffffffff ent 3e369021
Mar  3 16:50:36 joule kernel: assertion failed /usr/local/src/kvm-15/kernel/mmu.c:722: (gpa & HPA_ERR_MASK) == 0
Mar  3 16:50:36 joule kernel: audit error: (post page fault (fixed)) levels 2 gva 444000 gpa ffffffffffffffff hpa ffffffffffffffff ent 3e369021 


Then the kernel takes a huge time to boot, and at then end of the kernel boot, or maybe when
trying to start init, the following lines are printed hundred thousand of time:

Mar  3 18:40:30 joule kernel: audit error: (pre page fault) levels 2 gva ffffffffbfbfe000 gpa 1e81e000 hpa 4749c000 ent 564ca825
Mar  3 18:40:30 joule kernel: audit error: (post page fault (fixed)) levels 2 gva ffffffffbfbfe000 gpa 1e81e000 hpa 4749c000 ent 564ca825



-- 
  .''`.  Aurelien Jarno	            | GPG: 1024D/F1BCDB73
 : :' :  Debian developer           | Electrical Engineer
 `. `'   aurel32-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org         | aurelien-rXXEIb44qovR7s880joybQ@public.gmane.org
   `-    people.debian.org/~aurel32 | www.aurel32.net

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