Re: Unable to unload kvm-intel module

[Avi Kivity <avi@redhat.com>]

On 06/13/2011 08:11 PM, AP wrote:
> On Sun, Jun 12, 2011 at 8:35 AM, Avi Kivity<avi@redhat.com>  wrote:
> >  On 06/11/2011 03:02 AM, AP wrote:
> >>
> >>  I am building kvm as an external module against 2.6.38-8 (Ubuntu 11.04
> >>  kernel).
> >
> >  Why?
>
> I did not want move to the new kernel from kvm.git.

I generally find that it works well, though I only run it on servers.

> I just wanted to
> upgrade to the latest kvm module for some development. Is there a way
> to use the kvm.git tree and only build and load kvm?

kvm-kmod.

> >>  The kvm.ko and kvm-intel.ko build and insmod without any
> >>  issues. However I am able to unload the kvm-intel module. Here is the
> >>  lsmod listing:
> >>
> >>  kvm_intel             135653  0 [permanent]
> >>  kvm                   381130  1 kvm_intel,[permanent]
> >>
> >>  This is the error I get when I try to unload the module:
> >>
> >>  ERROR: Removing 'kvm_intel': Device or resource busy
> >>
> >>  Do I need to do anything special during building for
> >>  CONFIG_MODULE_UNLOAD to take effect?
> >>
> >
> >  No, as far as I know it should just work, and always has for me.  But it
> >  does say [permanent].  Any clue why in dmesg?
>
> The only thing I see in dmesg is:
> loaded kvm module (v2.6.39-8627-g2c2b5df)

         if (mod->init != NULL && mod->exit == NULL) {
                 printed_something = 1;
                 seq_printf(m, "[permanent],");
         }

I don't recall anything in kvm-kmod playing with these, so it's a 
mystery why this happens.

kvm.ko doesn't have an init or exit function.  kvm-intel.ko has both.  
Wierd.

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