On 02/11/2017 18:56, Nadav Amit wrote: > Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote: > >> On 02/11/2017 12:27, Ilya Lesokhin wrote: >>> Hi, >>> Just in case anyone is interested, I've hit a WARN_ON that shouldn't happen: >>> http://elixir.free-electrons.com/linux/v4.13.10/source/arch/x86/kernel/traps.c#L788 >>> >>> I was single stepping in GDB connected to a QEMU target >>> and got the trace below inside the VM. >>> >>> I'm not sure If it's a kernel bug or a KVM bug and I did try to reproduce or debug it. >>> >>> Hypervisor was running 3.10.0-514.21.1.el7.x86_64. >>> VM was running a modified 4.13.0. >> >> It's a KVM bug, though I'm not sure if it's easily fixable. > > What’s wrong with MTF? That’s what I used for debugging the Intel tests. Nothing, but I haven't checked if you might get the same failure on AMD---which doesn't have it. Thanks, Paolo
