Re: [Qemu-devel] [PATCH 3/3] tests/acceptance: Add boot linux with kvm test

[Cleber Rosa <crosa@redhat.com>]

On Fri, Jun 28, 2019 at 05:18:46PM -0300, Eduardo Habkost wrote:
> On Fri, Jun 28, 2019 at 11:02:17AM -0400, Wainer dos Santos Moschetta wrote:
> > Until now the suite of acceptance tests doesn't exercise
> > QEMU with kvm enabled. So this introduces a simple test
> > that boots the Linux kernel and checks it boots on the
> > accelerator correctly.
> > 
> > Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
> 
> Why not just change the existing test_x86_64_pc() test case to
> use KVM by default?  We can use "accel=kvm:tcg" to allow it to
> fall back to TCG if KVM is not available.
> 
> -- 
> Eduardo

I though of something similar, but not exactly the same.  An example
can be seen here:

  https://travis-ci.org/clebergnu/qemu/jobs/551437429#L3350

IMO, it's a good practice to be able to briefly describe what a test
does, given its name.  It's also very important for the test to
attempt to exercise the same behavior across executions.

I'm saying that because I don't think we should fallback to TCG if KVM
is not available, but instead, have two different tests that do each a
simpler and more predictable set of checks.  This would make it
simpler to find KVM issues when a given test fails but the TCG
continues to pass.  The tags (and other mechanisms) can be used to
select the tests that a given job should run though.

Regards!
- Cleber.