Re: [PATCH 5/5] migration: restore vmstate on migration failure

[Juan Quintela]

Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru> wrote:
> 1. Otherwise failed migration just drops guest-panicked state, which is
>    not good for management software.
>
> 2. We do keep different paused states like guest-panicked during
>    migration with help of global_state state.
>
> 3. We do restore running state on source when migration is cancelled or
>    failed.
>
> 4. "postmigrate" state is documented as "guest is paused following a
>    successful 'migrate'", so originally it's only for successful path
>    and we never documented current behavior.
>
> Let's restore paused states like guest-panicked in case of cancel or
> fail too. Allow same transitions like for inmigrate state.
>
> This commit changes the behavior that was introduced by commit
> 42da5550d6 "migration: set state to post-migrate on failure" and
> provides a bit different fix on related
>   https://bugzilla.redhat.com/show_bug.cgi?id=1355683
>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

Reviewed-by: Juan Quintela <quintela@redhat.com>