[PATCH 3/4] tests/migration: Disable autoconverge test on Travis-CI s390x

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

This test fails on Travis-CI s390x when configured with --disable-tcg:

  $ make check-qtest
    TEST    check-qtest-s390x: tests/qtest/boot-serial-test
  qemu-system-s390x: -accel tcg: invalid accelerator tcg
  qemu-system-s390x: falling back to KVM
    TEST    check-qtest-s390x: tests/qtest/pxe-test
    TEST    check-qtest-s390x: tests/qtest/test-netfilter
    TEST    check-qtest-s390x: tests/qtest/test-filter-mirror
    TEST    check-qtest-s390x: tests/qtest/test-filter-redirector
    TEST    check-qtest-s390x: tests/qtest/drive_del-test
    TEST    check-qtest-s390x: tests/qtest/device-plug-test
    TEST    check-qtest-s390x: tests/qtest/virtio-ccw-test
    TEST    check-qtest-s390x: tests/qtest/cpu-plug-test
    TEST    check-qtest-s390x: tests/qtest/migration-test
  **
  ERROR:tests/qtest/migration-test.c:1229:test_migrate_auto_converge: 'got_stop' should be FALSE
  ERROR - Bail out! ERROR:tests/qtest/migration-test.c:1229:test_migrate_auto_converge: 'got_stop' should be FALSE
  make: *** [tests/Makefile.include:633: check-qtest-s390x] Error 1

Per David Gilbert, it might be a threshold requiring tuning:
"it could just be the writing is slow on s390 and the migration
thread fast; in which case the autocomplete wouldn't be needed.
Perhaps we just need to reduce the bandwidth limit."

Disable the autoconverge test for now.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 tests/qtest/migration-test.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
index 3d6cc83b88..878399666e 100644
--- a/tests/qtest/migration-test.c
+++ b/tests/qtest/migration-test.c
@@ -1181,6 +1181,16 @@ static void test_migrate_auto_converge(void)
     MigrateStart *args = migrate_start_new();
     QTestState *from, *to;
     int64_t remaining, percentage;
+    char *travis_arch;
+
+    /*
+     * This test does not work reliably on Travis s390x.
+     */
+    travis_arch = getenv("TRAVIS_CPU_ARCH");
+    if (travis_arch && g_str_equal(travis_arch, "s390x")) {
+        g_test_skip("Test does not work reliably on s390x Travis containers.");
+        return;
+    }
 
     /*
      * We want the test to be stable and as fast as possible.
-- 
2.21.1