Re: [Qemu-devel] [PATCH 2/3] migration: fix migrate_cancel leads live_migration thread hung forever

[Juan Quintela]

Ivan Ren <address@hidden> wrote:
> When we 'migrate_cancel' a multifd migration, live_migration thread may
> hung forever at some points, because of multifd_send_thread has already
> exit for socket error:
> 1. multifd_send_pages may hung at qemu_sem_wait(&multifd_send_state->
>    channels_ready)
> 2. multifd_send_sync_main my hung at qemu_sem_wait(&multifd_send_state->
>    sem_sync)
>
> Signed-off-by: Ivan Ren <address@hidden>
> ---
> +    if (ret != 0) {
> +        if (flags & MULTIFD_FLAG_SYNC) {
> +            qemu_sem_post(&multifd_send_state->sem_sync);

flags is also needed.

Sorry, Juan.


> +        }
> +        qemu_sem_post(&multifd_send_state->channels_ready);
> +    }
> +
>      qemu_mutex_lock(&p->mutex);
>      p->running = false;
>      qemu_mutex_unlock(&p->mutex);