Linux kernel: powerpc: KVM guest can trigger host crash on Power8

[John Paul Adrian Glaubitz]

Hi Michael!

On 1/7/22 12:20, John Paul Adrian Glaubitz wrote:
>> Can you separately test with (on the host):
>>
>>  # echo 0 > /sys/module/kvm_hv/parameters/dynamic_mt_modes
> 
> I'm trying to turn off "dynamic_mt_modes" first and see if that makes any difference.
> 
> I will report back.

So far the machine is running stable now and the VM built gcc-9 without
crashing the host. I will continue to monitor the machine and report back
if it crashes, but it looks like this could be it.

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz at debian.org
`. `'   Freie Universitaet Berlin - glaubitz at physik.fu-berlin.de
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913