Re: kvm-15 on top of 2.6.20 - unresolved symbols

Re: kvm-15 on top of 2.6.20 - unresolved symbols

[Emil Tantilov]

Finally I got some time and played with this some
more. The unresolved symbols are caused by the fact
that the kvm module fails to load:

FATAL: Error inserting kvm
(/lib/modules/2.6.20/extra/kvm.ko): Device or resource
busy

I narrowed it down the following:

r = register_filesystem(&kvm_fs_type);
        if (r)              
                goto out3;

On my system the above code fails with EBUSY. Any
ideas?

Thanks,
Emil

--- Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org> wrote:

> Emil Tantilov wrote:
> > Avi,
> >
> > I tried using kvm-15 on top of 2.6.20, but when I
> try
> > to load kvm-intel I get unresolved symbols. The
> > modules from kvm-14 load fine in the same
> > configuration.
> >
> >   
> 
> Perhaps you have one module from kvm-14 and another
> from kvm-15?
> 
> Please post to kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, not
> to me directly.
> 
> 
> -- 
> Do not meddle in the internals of kernels, for they
> are subtle and quick to panic.
> 
> 



 
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Re: kvm-15 on top of 2.6.20 - unresolved symbols

[Avi Kivity]

Emil Tantilov wrote:
> Finally I got some time and played with this some
> more. The unresolved symbols are caused by the fact
> that the kvm module fails to load:
>
> FATAL: Error inserting kvm
> (/lib/modules/2.6.20/extra/kvm.ko): Device or resource
> busy
>
> I narrowed it down the following:
>
> r = register_filesystem(&kvm_fs_type);
>         if (r)              
>                 goto out3;
>
> On my system the above code fails with EBUSY. Any
> ideas?
>   


kvm-15 has a bug where it succeeds in initializing the module but 
returns failure.  So the filesystem is registered, module loading fails, 
and when you reload the module it can't register the filesystem again.

The fix was posted in 
http://article.gmane.org/gmane.comp.emulators.kvm.devel/1537.  I'll 
release kvm-16 shortly so others don't trip over it.

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


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