Re: [PATCH] tests/qtest/migration-test: Disable migration/multifd/tcp/plain/cancel

[Peter Maydell]

On Fri, 3 Mar 2023 at 09:10, Juan Quintela <quintela@redhat.com> wrote:
>
> Daniel P. Berrangé <berrange@redhat.com> wrote:
> > On Thu, Mar 02, 2023 at 05:22:11PM +0000, Peter Maydell wrote:
> >> migration-test has been flaky for a long time, both in CI and
> >> otherwise:
> >>
> >> https://gitlab.com/qemu-project/qemu/-/jobs/3806090216
> >> (a FreeBSD job)
> >>   32/648 
> >> ERROR:../tests/qtest/migration-helpers.c:205:wait_for_migration_status: 
> >> assertion failed: (g_test_timer_elapsed() < MIGRATION_STATUS_WAIT_TIMEOUT) 
> >> ERROR
> >>
> >> on a local macos x86 box:



> What is really weird with this failure is that:
> - it only happens on non-x86

No, I have seen it on x86 macos, and x86 OpenBSD

> - on code that is not arch dependent
> - on cancel, what we really do there is close fd's for the multifd
>   channel threads to get out of the recv, i.e. again, nothing that
>   should be arch dependent.

I'm pretty sure that it tends to happen when the machine that's
running the test is heavily loaded. You probably have a race condition.

thanks
-- PMM