Re: [Qemu-devel] QEMU postcopy-test failing on ppc64

[Laurent Vivier]

On 14/11/2016 21:52, Stefan Hajnoczi wrote:
> I hit a failure running "make check" on ppc64 for the first time.  Ideas?
> 
> Stefan
> 
> commit 682df581c65ed2c1b9e77093e332214ecaa1ee93
> 
>   GTESTER check-qtest-ppc64
> Memory content inconsistency at 5af4000 first_byte = 1b last_byte = 1a
> current = 7c hit_edge = 1
> Memory content inconsistency at 5af5000 first_byte = 1b last_byte = 7c
> current = 1b hit_edge = 1
> Memory content inconsistency at 5e59000 first_byte = 1b last_byte = 1b
> current = 1a hit_edge = 1
> **
> ERROR:tests/postcopy-test.c:345:check_guests_ram: 'bad' should be FALSE
> GTester: last random seed: R02S9d79166a1ca7e21940a0f4b0b1255d5b
> 

Are you using KVM PR?

it  was working fine with TCG and KVM HV.

Apparently, USERFAULTFD doesn't work with KVM PR.

I've already seen this kind of error with nested KVM on Power:
guest in guest with KVM PR in host.

This problem was reported on IRC by Greg if I remember correctly (CC:)

Laurent