On Tue, Nov 4, 2025 at 9:34 AM Li Zhijian <[email protected]> wrote:
>
> Commit 4881411136 ("migration: Always set DEVICE state") set a new DEVICE
> state before completed during migration, which broke the original transition
> to COLO. The migration flow for precopy has changed to:
> active -> pre-switchover -> device -> completed.
>
> This patch updates the transition state to ensure that the Pre-COLO
> state corresponds to DEVICE state correctly.
>
> Fixes: 4881411136 ("migration: Always set DEVICE state")
> Signed-off-by: Li Zhijian <[email protected]>

LGTM~ Thanks Zhijian.

Reviewed-by: Zhang Chen <[email protected]>
Tested-by: Zhang Chen <[email protected]>

> ---
>  migration/migration.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/migration/migration.c b/migration/migration.c
> index a63b46bbef..6ec7f3cec8 100644
> --- a/migration/migration.c
> +++ b/migration/migration.c
> @@ -3095,9 +3095,9 @@ static void migration_completion(MigrationState *s)
>          goto fail;
>      }
>
> -    if (migrate_colo() && s->state == MIGRATION_STATUS_ACTIVE) {
> +    if (migrate_colo() && s->state == MIGRATION_STATUS_DEVICE) {
>          /* COLO does not support postcopy */
> -        migrate_set_state(&s->state, MIGRATION_STATUS_ACTIVE,
> +        migrate_set_state(&s->state, MIGRATION_STATUS_DEVICE,
>                            MIGRATION_STATUS_COLO);
>      } else {
>          migration_completion_end(s);
> --
> 2.44.0
>

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