Re: [RFC PATCH 2/3] tests/qtest/migration-test: enable on s390x

["Nicholas Piggin" <npiggin@gmail.com>]

On Mon May 27, 2024 at 3:46 PM AEST, Prasad Pandit wrote:
> Hi,
>
> On Sat, 25 May 2024 at 18:44, Nicholas Piggin <npiggin@gmail.com> wrote:
> > s390x is more stable now. Enable it.
> >
> > Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
> > ---
> >  tests/qtest/migration-test.c | 12 ------------
> >  1 file changed, 12 deletions(-)
> >
> > diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
> > index 94d5057857..7987faaded 100644
> > --- a/tests/qtest/migration-test.c
> > +++ b/tests/qtest/migration-test.c
> > @@ -3428,16 +3428,6 @@ int main(int argc, char **argv)
> >      migration_test_add("/migration/analyze-script", test_analyze_script);
> >  #endif
> >
> > -    /*
> > -     * On s390x, the test seems to be touchy with TCG, perhaps due to race
> > -     * conditions on dirty bits, so disable it there until the problems are
> > -     * resolved.
> > -     */
>
>     -> https://lists.nongnu.org/archive/html/qemu-devel/2024-05/msg04774.html
>
> * Above patch (not reviewed yet) adds comment about sporadic problems
> on s390x, and this patch says s390x is stable now? It'll help to
> mention in the commit log - what changed to make it stable in 1 day.

Patch 1 of this series.

> * IIUC, this and the ppc64 patch above enable 'migration-test' for
> s390x and ppc64 platforms, when KVM is not available for them? ie.
> When running s390x & ppc64 migration-tests with TCG on non s390x or
> non-ppc64 machines, right? Maybe the commit message could say
> something to the effect of - enable s390x and ppc64 'migration-test'
> to run with TCG across platforms where KVM for s390x  OR  KVM for
> ppc64 is not available.

Yes they should be called "enable for TCG" indeed.

> > -    if (g_str_equal(arch, "s390x") && !has_kvm) {
> > -        g_test_message("Skipping tests: s390x host with KVM is required");
> > -        goto test_add_done;
> > -    }
> > -
> >      if (is_x86) {
> >          migration_test_add("/migration/precopy/unix/suspend/live",
> >                             test_precopy_unix_suspend_live);
> > @@ -3619,8 +3609,6 @@ int main(int argc, char **argv)
> >                             test_vcpu_dirty_limit);
> >      }
> >
> > -test_add_done:
> > -
> >      ret = g_test_run();
> >
> >      g_assert_cmpint(ret, ==, 0);
> > --
>
> * Otherwise, the change looks okay to enable 'migration-test' for
> s390x with TCG IIUC.

Thanks,
Nick