Re: [PATCH v2 6/6] migration/migration.c: Fix hang in ram_save_host_page

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Lukas Straub (lukasstraub2@web.de) wrote:
> migration_rate_limit will erroneously ratelimit a shutdown socket,
> which causes the migration thread to hang in ram_save_host_page
> if the socket is shutdown.
> 
> Fix this by explicitly testing if the socket has errors or was
> shutdown in migration_rate_limit.
> 
> Signed-off-by: Lukas Straub <lukasstraub2@web.de>

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

and queued this one (the others in the series are the same as the v1)


> ---
>  migration/migration.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/migration/migration.c b/migration/migration.c
> index 187ac0410c..e8bd32d48c 100644
> --- a/migration/migration.c
> +++ b/migration/migration.c
> @@ -3347,6 +3347,10 @@ bool migration_rate_limit(void)
>      bool urgent = false;
>      migration_update_counters(s, now);
>      if (qemu_file_rate_limit(s->to_dst_file)) {
> +
> +        if (qemu_file_get_error(s->to_dst_file)) {
> +            return false;
> +        }
>          /*
>           * Wait for a delay to do rate limiting OR
>           * something urgent to post the semaphore.
> --
> 2.20.1


--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK