On Tue, 15 Nov 2016 14:48:30 +0000 Stefan Hajnoczi <stefa...@gmail.com> wrote:
> On Tue, Nov 15, 2016 at 01:58:38PM +0100, Laurent Vivier wrote: > > > > > > On 15/11/2016 13:20, Dr. David Alan Gilbert wrote: > > > * Stefan Hajnoczi (stefa...@gmail.com) wrote: > > >> On Tue, Nov 15, 2016 at 10:09 AM, Greg Kurz <gr...@kaod.org> wrote: > > >>> On Tue, 15 Nov 2016 10:53:35 +0100 > > >>> Laurent Vivier <lviv...@redhat.com> wrote: > > >>> > > >>>> 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:) > > >>>> > > >>> > > >>> Yeah I hit this when running make check in a PPC64 BE guest which > > >>> has kvm_pr loaded. I did not find time to investigate though... I've > > >>> switched to run make check on bare metal POWER7 instead. > > >> > > >> Right, it's POWER7 PPC64 BE with kvm_pr. > > >> > > >> If this should be fixed for QEMU 2.8 please add it to > > >> http://qemu-project.org/Planning/2.8 and I'll track it (i.e. won't > > >> release before it's resolved). > > >> > > >> If this is a known issue that will be in QEMU 2.8 please add it to > > >> http://qemu-project.org/ChangeLog/2.8#Known_issues. > > > > > > I don't think it's new with 2.8 (Laurent?) and I think it's actually > > > a kernel issue that needs fixing. > > > > I's not a regression and I think it's a kernel issue. > > > > As it has never worked with KVM PR and can't be fixed at QEMU level, we > > can't solve it for 2.8 (no tracking). > > > > I'm going to update the know issues for 2.8. > > [and I'm going to try to understand what really happens] > > Should the test be skipped on KVM PR? > > It's a shame that make check fails. > Yeah I agree this is lame but KVM PR isn't very cherished these days... Since postcopy-test runs QEMU with -accel kvm:tcg, a possible workaround is to kick KVM out of the environment you're running make check in. > Stefan
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