Re: [PATCH] migration: Don't try and recover return path in non-postcopy

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

* Dr. David Alan Gilbert (git) (dgilbert@redhat.com) wrote:
> From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> 
> In normal precopy we can't do reconnection recovery - but we also
> don't need to, since you can just rerun migration.
> At the moment if the 'return-path' capability is on, we use
> the return path in precopy to give a postiive 'OK' to the end
> of migration; however if migration fails then we fall into
> the postcopy recovery path and hang.  This fixes it by only
> running the return path in the postcopy case.
> 
> Reported-by: Greg Kurz <groug@kaod.org>
> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

Queued

> ---
>  migration/migration.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/migration/migration.c b/migration/migration.c
> index 5f7e4d15e9..d5d9b31bb7 100644
> --- a/migration/migration.c
> +++ b/migration/migration.c
> @@ -2481,7 +2481,7 @@ retry:
>  out:
>      res = qemu_file_get_error(rp);
>      if (res) {
> -        if (res == -EIO) {
> +        if (res == -EIO && migration_in_postcopy()) {
>              /*
>               * Maybe there is something we can do: it looks like a
>               * network down issue, and we pause for a recovery.
> -- 
> 2.21.0
> 
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK