Re: [syzbot] WARNING in kvm_mmu_uninit_tdp_mmu (2)

[Sean Christopherson]

On Thu, Apr 28, 2022, Maxim Levitsky wrote:
> On Thu, 2022-04-28 at 19:22 +0200, Paolo Bonzini wrote:
> > On 4/28/22 17:32, Sean Christopherson wrote:
> > > On Tue, Apr 26, 2022, Maxim Levitsky wrote:
> > > > I can reproduce this in a VM, by running and CTRL+C'in my ipi_stress test,
> > > 
> > > Can you post your ipi_stress test?  I'm curious to see if I can repro, and also
> > > very curious as to what might be unique about your test.  I haven't been able to
> > > repro the syzbot test, nor have I been able to repro by killing VMs/tests.
> > 
> > Did you test with CONFIG_PREEMPT=y?
> 
> yes, I test with CONFIG_PREEMPT but I only enabled it a day ago,
> I think I had seen this warning before, but could bit, I'll check
> if that fails without CONFIG_PREEMPT as well.

I have not tested with CONFIG_PREEMPT.  For some unknown reason the syzbot configs
don't play nice with my VM setup and so I never use them verbatim.  I didn't think
to pull over CONFIG_PREEMPTY.  I'll give that a shot.