Frank Mehnert <[EMAIL PROTECTED]> writes:

> 
> Tom,

Hi Frank!

Thanks for the response!


> On Thursday 18 January 2007 11:23, Tom wrote:
> > First of all a big thanks! This looks like a very promising piece of
> > software.
> 
> Thank you.
> 
> > But I have some troubles loading the kernel module in 2.6.19.2
> >
> > dmesg:
> > vboxdrv: NMI watchdog active -- refused to load the kernel module! Please
> > disable vboxdrv: the NMI watchdog by specifying 'nmi_watchdog=0' at kernel
> > command line.
> >
> > The FAQ says, I should boot with nmi_watchdog=0 which does not make sense
> > as:
> >
> > a) I don't even have watchdog compiled in:
> >
> > tom <at> SiRiUS ~ $ zgrep WATCHDOG /proc/config.gz
> > # CONFIG_WATCHDOG is not set
> 
> It _does_ make sense. Because the watchdog you have looked for is a
> different thing than the NMI watchdog.

Ah, I thought they were related. But thinking of it once more, if they really
were, then having it disabled in the kernel, there should also be no entry for
it in /proc - right.

> > b) thanks to /proc a reboot wouldn't be needed anyway:
> >
> > tom <at> SiRiUS ~ $ find /proc/sys -name *watchdog* |xargs cat
> > 0
> >
> > So I assume 'echo 0 > /proc/sys/kernel/nmi_watchdog' would be enough, but
> > it's set to 0 anyway in my case, see a).
> >
> > Do you have any idea on that?
> > I tried both, the binary version, and compiled from SVN.
> 
> Our check might be a bit too strict. NMI has to be disabled, at least as long
> as VBox is running. And we have to make sure that the user is not able to
> re-enable it accidently, therefore the strict check.
> 
> We are working on a better solution right now, I hope the next release will
> contain a fix.
> 
> Kind regards,
> 
> Frank

So the check currently is, if the kernel was bootet with a command line
containing nmi_watchdog=0 --> OK, else --> error? That indeed would explain the
need for a reboot.

Thanks for clearing this out!

Regards,
Tom




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