[vbox-dev] Unknown symbol smp_call_function_single with vboxguest

Ribhi Kamal rbhkamal at gmail.com
Wed Apr 11 13:58:24 PDT 2012

I built vboxguest.ko so that it could be loaded on a custom built Linux
image. However, when I try to load it I get the following error:
modprobe -f
vboxguest: Unknown symbol smp_call_function_single
vboxguest: Unknown symbol on_each_cpu
vboxguest: Unknown symbol register_cpu_notifier
... smp_call_function
... unregister_cpu_notifier
... _spin_unlock_irqrestore
... paravirt_ops
... _spin_lock_irqsave
... _spin_lock

Now the kernel that I'm using is 2.6.20, but I don't know why it doesn't
have the SMP symbols... perhaps the version is incorrect. All I want from
vboxguest is pagefusion and maybe memory ballooning. So my question is
this: How hard is it to get vboxguest to work without the functions
above... or at least to get page fusion working.

I looked at the source/make files and it seems that I maybe able to get
away with some missing functions if I set the kernel_version_code to 2.5.

Any help would be greatly appreciated!

-- Ribhi
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