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migration/colo: Replace QemuSemaphore with QemuEvent

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colo_exit_sem and colo_incoming_sem represent one-shot events so they
can be converted into QemuEvent, which is more lightweight.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Link: https://lore.kernel.org/r/20250529-event-v5-8-53b285203794@daynix.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Akihiko Odaki 2025-05-29 14:45:57 +09:00 • committed by Paolo Bonzini
parent 952691b7a6
commit da926a8b9d
2 changed files with 13 additions and 13 deletions
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6
migration/migration.h
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@ -186,7 +186,7 @@ struct MigrationIncomingState {
/* The coroutine we should enter (back) after failover */
Coroutine *colo_incoming_co;
QemuSemaphore colo_incoming_sem;
QemuEvent colo_incoming_event;
/* Optional load threads pool and its thread exit request flag */
ThreadPool *load_threads;
@ -381,8 +381,8 @@ struct MigrationState {
/* Migration is paused due to pause-before-switchover */
QemuEvent pause_event;
/* The semaphore is used to notify COLO thread that failover is finished */
QemuSemaphore colo_exit_sem;
/* The event is used to notify COLO thread that failover is finished */
QemuEvent colo_exit_event;
/* The event is used to notify COLO thread to do checkpoint */
QemuEvent colo_checkpoint_event;