Re: [PATCH v4 09/11] migration: update capability conflict test for postcopy-ram+mapped-ram

On 2026-08-01 08:06, Aadeshveer Singh wrote:
> Remove the test test_validate_caps_pair, which asserted postcopy-ram
> and mapped-ram capabilities cannot be active together. The new fast
> snapshot load feature is exactly this pair of capabilities active
> together, with the following patches in this series, this combination
> will now supported and be functional.
> 
> Remove the capability check that rejected mapped-ram and postcopy-ram
> being set simultaneously, as this combination now corresponds to fast
> snapshot load.
> 
> Add a capability check against setting multifd when configured for fast
> snapshot load as it is not supported yet. Also add capability check
> against setting postcopy-preempt as it is incompatible.
> 
> Add infrastructure to check postcopy_notifier_list being empty in
> capaility checking to block vhost-user with fast snapshot load as it is
> not supported.
> 
> A smoke test exercising this feature has been added further in this
> series.
> 
> Signed-off-by: Aadeshveer Singh <[email protected]>
> ---
>  include/qemu/notify.h              |  2 ++
>  migration/options.c                | 20 ++++++++++--
>  migration/postcopy-ram.c           |  5 +++
>  migration/postcopy-ram.h           |  1 +
>  tests/qtest/migration/misc-tests.c | 52 ------------------------------
>  util/notify.c                      |  5 +++
>  6 files changed, 31 insertions(+), 54 deletions(-)

Reviewed-by: Juraj Marcin <[email protected]>