[Bug 216177] kvm-unit-tests vmx has about 60% of failure chance

bugzilla-daemon
2022-06-28T01:42:49Z

--- Comment #5 from Nadav Amit (nadav.amit@gmail.com) ---
> On Jun 27, 2022, at 6:19 PM, bugzilla-daemon@kernel.org wrote:
>
> https://bugzilla.kernel.org/show_bug.cgi?id=216177
>
> --- Comment #3 from Yang Lixiao (lixiao.yang@intel.com) ---
> (In reply to Nadav Amit from comment #2)
>>> On Jun 27, 2022, at 5:28 PM, bugzilla-daemon@kernel.org wrote:
>>>
>>> https://bugzilla.kernel.org/show_bug.cgi?id=216177
>>>
>>> Sean Christopherson (seanjc@google.com) changed:
>>>
>>> What |Removed |Added
>>>
>> ----------------------------------------------------------------------------
>>> CC| |seanjc@google.com
>>>
>>> --- Comment #1 from Sean Christopherson (seanjc@google.com) ---
>>> It's vmx_preemption_timer_expiry_test, which is known to be flaky (though
>>> IIRC
>>> it's KVM that's at fault).
>>>
>>> Test suite: vmx_preemption_timer_expiry_test
>>> FAIL: Last stored guest TSC (28067103426) < TSC deadline (28067086048)
>>
>> For the record:
>>
>> https://lore.kernel.org/kvm/D121A03E-6861-4736-8070-5D1E4FEE1D32@gmail.com/
>
> Thanks for your reply. So this is a KVM bug, and you have sent a patch to kvm
> to fix this bug, right?

As I noted, at some point I did not manage to reproduce the failure.

The failure on bare-metal that I experienced hints that this is either a test
bug or (much less likely) a hardware bug. But I do not think it is likely to be
a KVM bug.