Re: kvm-kmod.git

Avi Kivity
2009-06-01T17:01:21Z

Ryan Harper wrote:
>>> I also wonder what happens if one tries to build on
>>> a machine with kvm built into kernel. Ideally one would get
>>> a clear error message.
>>>
>>>
>> kvm-kmod is really designed for those running on pre-kvm distro kernels,
>> and for those testing newer kvm versions on distro kernels. If you can
>> compile your own kernel, download kvm.git and run that.
>>
>
> So no way of having kvm-kmod sync in kvm.git bits and still build
> against the current running kernel?
>

We must be miscommunicating, what you describe is kvm-kmod.git's sole
purpose in life.

> I wanted to test out 2.6.29-maint kernel modules and in
> kvm-userspace/kernel, I could checkout maint/2.6.29 in kvm.git and then
> make LINUX= sync. I couldn't quite figure out how to do that with
> kvm-kmod since when I do a ./configure --kerneldir -- it's building
> modules *for* whatever kernel is at kerneldir rather than just syncing
> in the kvm bits from that kerneldir and then building modules against
> the running kernel.
>

'make sync' will copy the kvm bits from the linux-2.6 directory, or
$(LINUX) if you specify that to make.

So:
LINUX= is for the kvm sources (further controlled by whatever branch
is checked out)
--kerneldir= is for the host kernel

> The reason I'm digging is that I'm seeing 64-bit migration failing on
> maint/2.6.29 kvm modules, but not on upstream kvm kernel bits and I
> wanted to bisect to find where 64-bit migration is fixed so I can
> suggest what to pull into maint/2.6.29.
>

Thanks, that's helpful. How does it fail? maybe I can supply an
educated guess.

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