Re: [kvm-unit-tests PATCH v8 05/35] arch-run: Add a "continuous" migration option for tests

[Thomas Huth <thuth@redhat.com>]

On 05/04/2024 10.35, Nicholas Piggin wrote:
> The cooperative migration protocol is very good to control precise
> pre and post conditions for a migration event. However in some cases
> its intrusiveness to the test program, can mask problems and make
> analysis more difficult.
> 
> For example to stress test migration vs concurrent complicated
> memory access, including TLB refill, ram dirtying, etc., then the
> tight spin at getchar() and resumption of the workload after
> migration is unhelpful.
> 
> This adds a continuous migration mode that directs the harness to
> perform migrations continually. This is added to the migration
> selftests, which also sees cooperative migration iterations reduced
> to avoid increasing test time too much.
> 
> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
> ---
>   common/selftest-migration.c | 16 +++++++++--
>   lib/migrate.c               | 18 ++++++++++++
>   lib/migrate.h               |  3 ++
>   scripts/arch-run.bash       | 55 ++++++++++++++++++++++++++++++++-----
>   4 files changed, 82 insertions(+), 10 deletions(-)

Reviewed-by: Thomas Huth <thuth@redhat.com>