Re: KCSAN + KVM = host reset

Qian Cai
2020-04-08T21:29:22Z

> On Apr 8, 2020, at 5:25 PM, Paolo Bonzini <pbonzini@redhat.com> wrote:
>
> On 08/04/20 22:59, Qian Cai wrote:
>> Running a simple thing on this AMD host would trigger a reset right away.
>> Unselect KCSAN kconfig makes everything work fine (the host would also
>> reset If only "echo off > /sys/kernel/debug/kcsan” before running qemu-kvm).
>
> Is this a regression or something you've just started to play with? (If
> anything, the assembly language conversion of the AMD world switch that
> is in linux-next could have reduced the likelihood of such a failure,
> not increased it).

I don’t remember I had tried this combination before, so don’t know if it is a
regression or not.