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Re: [PATCH] tests/qtest: failover: fix infinite loop
From: |
Dr. David Alan Gilbert |
Subject: |
Re: [PATCH] tests/qtest: failover: fix infinite loop |
Date: |
Mon, 4 Apr 2022 18:48:30 +0100 |
User-agent: |
Mutt/2.1.5 (2021-12-30) |
* Laurent Vivier (lvivier@redhat.com) wrote:
> If the migration is over before we cancel it, we are
> waiting in a loop a state that never comes because the state
> is already "completed".
>
> To avoid an infinite loop, skip the test if the migration
> is "completed" before we were able to cancel it.
>
> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
If you're finding it's skipping to often, you might try setting the
migration bandwidth really low right at the start (a few bytes/second)
to ensure it doesn't complete under your feet.
Dave
> ---
> tests/qtest/virtio-net-failover.c | 29 +++++++++++++++++++++++++----
> 1 file changed, 25 insertions(+), 4 deletions(-)
>
> diff --git a/tests/qtest/virtio-net-failover.c
> b/tests/qtest/virtio-net-failover.c
> index 80292eecf65f..78811f1c9216 100644
> --- a/tests/qtest/virtio-net-failover.c
> +++ b/tests/qtest/virtio-net-failover.c
> @@ -1141,6 +1141,11 @@ static void test_migrate_guest_off_abort(gconstpointer
> opaque)
> ret = migrate_status(qts);
>
> status = qdict_get_str(ret, "status");
> + if (strcmp(status, "completed") == 0) {
> + g_test_skip("Failed to cancel the migration");
> + qobject_unref(ret);
> + goto out;
> + }
> if (strcmp(status, "active") == 0) {
> qobject_unref(ret);
> break;
> @@ -1155,8 +1160,12 @@ static void test_migrate_guest_off_abort(gconstpointer
> opaque)
>
> while (true) {
> ret = migrate_status(qts);
> -
> status = qdict_get_str(ret, "status");
> + if (strcmp(status, "completed") == 0) {
> + g_test_skip("Failed to cancel the migration");
> + qobject_unref(ret);
> + goto out;
> + }
> if (strcmp(status, "cancelled") == 0) {
> qobject_unref(ret);
> break;
> @@ -1169,6 +1178,7 @@ static void test_migrate_guest_off_abort(gconstpointer
> opaque)
> check_one_card(qts, true, "standby0", MAC_STANDBY0);
> check_one_card(qts, false, "primary0", MAC_PRIMARY0);
>
> +out:
> qos_object_destroy((QOSGraphObject *)vdev);
> machine_stop(qts);
> }
> @@ -1251,8 +1261,7 @@ static void
> test_migrate_abort_wait_unplug(gconstpointer opaque)
> qobject_unref(ret);
> break;
> }
> - g_assert_cmpstr(status, !=, "failed");
> - g_assert_cmpstr(status, !=, "active");
> + g_assert_cmpstr(status, ==, "cancelling");
> qobject_unref(ret);
> }
>
> @@ -1324,11 +1333,11 @@ static void test_migrate_abort_active(gconstpointer
> opaque)
> ret = migrate_status(qts);
>
> status = qdict_get_str(ret, "status");
> + g_assert_cmpstr(status, !=, "failed");
> if (strcmp(status, "wait-unplug") != 0) {
> qobject_unref(ret);
> break;
> }
> - g_assert_cmpstr(status, !=, "failed");
> qobject_unref(ret);
> }
>
> @@ -1340,6 +1349,11 @@ static void test_migrate_abort_active(gconstpointer
> opaque)
> ret = migrate_status(qts);
>
> status = qdict_get_str(ret, "status");
> + if (strcmp(status, "completed") == 0) {
> + g_test_skip("Failed to cancel the migration");
> + qobject_unref(ret);
> + goto out;
> + }
> if (strcmp(status, "cancelled") == 0) {
> qobject_unref(ret);
> break;
> @@ -1352,6 +1366,7 @@ static void test_migrate_abort_active(gconstpointer
> opaque)
> check_one_card(qts, true, "standby0", MAC_STANDBY0);
> check_one_card(qts, true, "primary0", MAC_PRIMARY0);
>
> +out:
> qos_object_destroy((QOSGraphObject *)vdev);
> machine_stop(qts);
> }
> @@ -1425,6 +1440,11 @@ static void test_migrate_off_abort(gconstpointer
> opaque)
> ret = migrate_status(qts);
>
> status = qdict_get_str(ret, "status");
> + if (strcmp(status, "completed") == 0) {
> + g_test_skip("Failed to cancel the migration");
> + qobject_unref(ret);
> + goto out;
> + }
> if (strcmp(status, "cancelled") == 0) {
> qobject_unref(ret);
> break;
> @@ -1437,6 +1457,7 @@ static void test_migrate_off_abort(gconstpointer opaque)
> check_one_card(qts, true, "standby0", MAC_STANDBY0);
> check_one_card(qts, true, "primary0", MAC_PRIMARY0);
>
> +out:
> qos_object_destroy((QOSGraphObject *)vdev);
> machine_stop(qts);
> }
> --
> 2.35.1
>
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
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