Re: KVM selftests are failing

[Andrew Jones]

On Wed, Nov 14, 2018 at 11:29:59PM +0200, Ahmed Soliman wrote:
> Hello again,
> On Wed, Nov 14, 2018 at 9:23 PM Ahmed Soliman <ahmedsoliman@xxxxxxxxxxx> wrote:
> > I don't do a make clean normally, but I will do it this time when
> > bisecting, also I only use shallow
> >  clones so it will also take some time pulling. Also to note, The arch
> > I am using is Haswell, I am not
> > sure if that should make any difference though.
> 
> I started bisecting from commit 783e9e51266ebb7f78c606a53cb0fa41bb7c31a0
> which introduces kvm selftests. I started from complete clean kernel build and
> run, but unfortunately, I got the Assert there too.

I think you should be able to pre-compile the selftests and save them,
and then bisect the kernel further back than their introduction. Actually
you may want to simplify the test case to just a mmap/madvise pair and
see if that reproduces, since kvm selftests doesn't do much more than
that. (Other than all the /dev/kvm ioctls - you have the right perms
on /dev/kvm, or are running as root, right?)

Thanks,
drew