guest AND host rebooting

guest AND host rebooting

[user01]

hi list

just started playing a little with kvm & qemu. i discovered,
that resetting the guest actually resets the host. tested
on amd/pacifica with kvm-7 (svn revision 4115) with debian
as host and an openbsd install-cd (4.0) as guest. typing
"halt" in the guests shell shuts this guest down, and then
resets the host :)
did not try other operating systems as guest, as its my
second day playing around with this setup. has anybody
else seen this behaviour?

cheers
virtual

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Re: guest AND host rebooting

[Avi Kivity]

user01 wrote:
> hi list
>
> just started playing a little with kvm & qemu. i discovered,
> that resetting the guest actually resets the host. tested
> on amd/pacifica with kvm-7 (svn revision 4115) with debian
> as host and an openbsd install-cd (4.0) as guest. typing
> "halt" in the guests shell shuts this guest down, and then
> resets the host :)
> did not try other operating systems as guest, as its my
> second day playing around with this setup. has anybody
> else seen this behaviour?
>   

I haven't been able to reproduce this with Linux.  Can you post a link 
to the guest .iso?

Was the host 32-bit or 64-bit?

Can you set up a serial console and capture dmesg?


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


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Re: guest AND host rebooting

[user01]

hi

On Sun, 17 Dec 2006 16:53:20 +0200
Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org> wrote:

> >> Can you set up a serial console and capture dmesg?
> >>     
> >
> > sure. but which machine? host or guest?
> >   
> 
> the host please.  do an
> 
>    echo 9 > /proc/sysrq-trigger
> 
> before so we get to see anything interesting.

the only output i get is after increasing /proc/sysirq-trigger:
---- SNIP ----
Debian GNU/Linux 4.0 roland ttyS0

roland login: SysRq : Changing Loglevel
Loglevel set to 9

---- SNIP ----
then nothing happens except for the host rebooting.

qemu was started with:
"/usr/local/kvm/bin/qemu -cdrom obsd-4.0/i386/cd40.iso -boot d -m 64 -vnc 2"

in case i forgot to mention:
the host runs an vanilla 2.6.19.1 build with gcc-4.1.2

is there anything, i can do, to shed some light on this? i´m not
firm in c, so my abilities are somewhat limited *sigh*

regards
virtual

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Re: guest AND host rebooting

[user01]

(Resend, as "kvm-devel-TtF/mJH4Jtrk1uMJSBkQmQ@public.gmane.org" does not seem to get
forwarded)
----- SNIP ----
hi

On Sun, 17 Dec 2006 16:53:20 +0200
Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org> wrote:

> >> Can you set up a serial console and capture dmesg?
> >>     
> >
> > sure. but which machine? host or guest?
> >   
> 
> the host please.  do an
> 
>    echo 9 > /proc/sysrq-trigger
> 
> before so we get to see anything interesting.

the only output i get is after increasing /proc/sysirq-trigger:
---- SNIP ----
Debian GNU/Linux 4.0 roland ttyS0

roland login: SysRq : Changing Loglevel
Loglevel set to 9

---- SNIP ----
then nothing happens except for the host rebooting.

qemu was started with:
"/usr/local/kvm/bin/qemu -cdrom obsd-4.0/i386/cd40.iso -boot d -m 64 -vnc 2"

in case i forgot to mention:
the host runs an vanilla 2.6.19.1 build with gcc-4.1.2

is there anything, i can do, to shed some light on this? i´m not
firm in c, so my abilities are somewhat limited *sigh*

regards
virtual

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Re: guest AND host rebooting

[Avi Kivity]

user01 wrote:
>   
>>>> Can you set up a serial console and capture dmesg?
>>>>     
>>>>         
>>> sure. but which machine? host or guest?
>>>   
>>>       
>> the host please.  do an
>>
>>    echo 9 > /proc/sysrq-trigger
>>
>> before so we get to see anything interesting.
>>     
>
> the only output i get is after increasing /proc/sysirq-trigger:
> ---- SNIP ----
> Debian GNU/Linux 4.0 roland ttyS0
>
> roland login: SysRq : Changing Loglevel
> Loglevel set to 9
>
> ---- SNIP ----
> then nothing happens except for the host rebooting.
>
> qemu was started with:
> "/usr/local/kvm/bin/qemu -cdrom obsd-4.0/i386/cd40.iso -boot d -m 64 -vnc 2"
>
> in case i forgot to mention:
> the host runs an vanilla 2.6.19.1 build with gcc-4.1.2
>
> is there anything, i can do, to shed some light on this? i´m not
> firm in c, so my abilities are somewhat limited *sigh*
>   

Okay, I'll try to reproduce this here.  Please open a bug report in 
sourceforge with all this info so I can't pretend to forget it.


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


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