Re: [xen-unstable test] 156027: regressions - FAIL

[Jan Beulich <jbeulich@xxxxxxxx>]

On 20.10.2020 23:37, osstest service owner wrote:
> flight 156027 xen-unstable real [real]
> flight 156048 xen-unstable real-retest [real]
> http://logs.test-lab.xenproject.org/osstest/logs/156027/
> http://logs.test-lab.xenproject.org/osstest/logs/156048/

Here as well as in the respective 4.14 and 4.13 reports the
"retest" flights look to not really work, so they don't provide
any additional useful data. Ian?

> Regressions :-(
> 
> Tests which did not succeed and are blocking,
> including tests which could not be run:
>  test-amd64-i386-xl-qemut-debianhvm-i386-xsm 12 debian-hvm-install fail REGR. 
> vs. 156013

Taking together this and the respective 4.14 and 4.13 reports
there looks to be an interaction problem with qemu: The gpa
of the physical address of the NPF vCPU1 did encounter last
points at 04:00.0, i.e. the (emulated) NIC. In the 4.x flights
no such information is available (on VT-x the gpa of the last
EPT violation doesn't get dumped when dumping the VMCS), but
one of them shows Dom0 in the context of
XEN_DMOP_set_pci_intx_level, again for 04:00.0.

In any event the guests in all cases experience soft lockups.

What I'm unable to do for the moment is put in place any kind
of connection to the commits under test, but it's highly
likely one of the security fixes committed yesterday.

Jan