Re: [Qemu-devel] Help debugging a regression in KVM Module

[Alex Bennée]

Peter Lieven <address@hidden> writes:

> Hi,
>
> some time a go I stumbled across a regression in the KVM Module that has been 
> introduced somewhere
> between 3.17 and 3.19.
>
> I have a rather old openSUSE guest with an XFS filesystem which realiably 
> crashes after some live migrations.
> I originally believed that the issue might be related to my setup with a 3.12 
> host kernel and kvm-kmod 3.19,
> but I now found that it is also still present with a 3.19 host kernel with 
> included 3.19 kvm module.
>
> My idea was to continue testing on a 3.12 host kernel and then bisect all 
> commits to the kvm related parts.
>
> Now my question is how to best bisect only kvm related changes (those
> that go into kvm-kmod)?

In general I don't bother. As it is a bisection you eliminate half the
commits at a time you get their fairly quickly anyway. However you can
tell bisect which parts of the tree you car about:

  git bisect start -- arch/arm64/kvm include/linux/kvm* include/uapi/linux/kvm* 
virt/kvm/


>
> Thanks,
> Peter

-- 
Alex Bennée