Re: [PATCH 24/42] migration-test: Re-enable multifd_cancel test

[Juan Quintela <quintela@redhat.com>]

Daniel P. Berrangé <berrange@redhat.com> wrote:
> On Fri, Jun 09, 2023 at 12:49:25AM +0200, Juan Quintela wrote:
>
> Please explain why this is considered ok, given the comment about
> why it is disabled. ie if we fixed something, refrence the commit.

I did in the cover letter, will put that on the commit:

- We used to share dest_serial file for the two targets of migration (to
  and to2), where we have a race.

- this series fixes the races in two ways:

  * we wait for "to" to finish before we launch "to2", so the race can't
    happen.

  * One of the reasons why I created GuestState is that I needed a place
    to store the serial file name (now I call it "target" and "target2").

- I put on the cover letter that this is not enough, we also need
  Fabiano fix for the thread list.

- Peter Mayel was the most vocal about this particular failure, I cc'd
  him and asked on the cover letter for the people to used to have
  failures to test.

So how should I handled this to be clearer?

Later, Juan.

>> Signed-off-by: Juan Quintela <quintela@redhat.com>
>> ---
>>  tests/qtest/migration-test.c | 10 ++--------
>>  1 file changed, 2 insertions(+), 8 deletions(-)
>> 
>> diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
>> index 01ab51a391..9f86d9bc80 100644
>> --- a/tests/qtest/migration-test.c
>> +++ b/tests/qtest/migration-test.c
>> @@ -2886,14 +2886,8 @@ int main(int argc, char **argv)
>>      }
>>      qtest_add_func("/migration/multifd/tcp/plain/none",
>>                     test_multifd_tcp_none);
>> -    /*
>> -     * This test is flaky and sometimes fails in CI and otherwise:
>> -     * don't run unless user opts in via environment variable.
>> -     */
>> -    if (getenv("QEMU_TEST_FLAKY_TESTS")) {
>> -        qtest_add_func("/migration/multifd/tcp/plain/cancel",
>> -                       test_multifd_tcp_cancel);
>> -    }
>> +    qtest_add_func("/migration/multifd/tcp/plain/cancel",
>> +                   test_multifd_tcp_cancel);
>>      qtest_add_func("/migration/multifd/tcp/plain/zlib",
>>                     test_multifd_tcp_zlib);
>>  #ifdef CONFIG_ZSTD
>> -- 
>> 2.40.1
>> 
>
> With regards,
> Daniel