Re: [PATCH 6/6] gitlab-ci.d/buildtest: Disintegrate the build-coroutine-sigaltstack job

[Juan Quintela]

Peter Maydell <peter.maydell@linaro.org> wrote:
> On Fri, 3 Feb 2023 at 21:14, Juan Quintela <quintela@redhat.com> wrote:
>>
>> Peter Maydell <peter.maydell@linaro.org> wrote:
>> > The migration tests have been flaky for a while now,
>> > including setups where host and guest page sizes are the same.
>> > (For instance, my x86 macos box pretty reliably sees failures
>> > when the machine is under load.)
>>
>> I *thought* that we had fixed all of those.
>>
>> But it is difficult for me to know because:
>> - I only happens when one runs "make check"
>> - running ./migration-test have never failed to me
>> - When it fails (and it has been a while since it has failed to me)
>>   it is impossible to me to detect what is going on, and as said, I have
>>   never been able to reproduce running only migration-test.
>
> Yes. If we could improve the logging in the test so that when
> an intermittent failure does happen the test prints better
> clues about what happened, I think that would help a lot.
>
> https://lore.kernel.org/qemu-devel/CAFEAcA8x_iM3hN2-P9F+huXnXFXy+D6FzE+Leq4erLdg7zkVGw@mail.gmail.com/
> is the thread from late December about the macos failures.

We (red hat) found a similar problem with aarch64, but only when using
zero copy.  Will try to see if I can reproduce this other there.

https://bugzilla.redhat.com/show_bug.cgi?id=2160929

the similar thing to what you have is:
- they are trying to cancel
- they are on aarch64

but:

- they can only reproduce with zero copy enabled.

Later, Juan.