Re: [Qemu-devel] [PATCH v6 10/11] migration: remove the unnecessary RDMA_CONTROL_ERROR message

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

* Lidong Chen (jemmy858585@gmail.com) wrote:
> It's not necessary to send RDMA_CONTROL_ERROR when clean up rdma resource.
> If rdma->error_state is ture, the message may not send successfully.
> and the cm event can also notify the peer qemu.
> 
> Signed-off-by: Lidong Chen <lidongchen@tencent.com>

How does this keep 'cancel' working; I added 32bce196344 last year to
make that code also send the RDMA_CONTROL_ERROR in 'cancelling'.

Dave

> ---
>  migration/rdma.c | 11 -----------
>  1 file changed, 11 deletions(-)
> 
> diff --git a/migration/rdma.c b/migration/rdma.c
> index ae07515..e1498f2 100644
> --- a/migration/rdma.c
> +++ b/migration/rdma.c
> @@ -2305,17 +2305,6 @@ static void qemu_rdma_cleanup(RDMAContext *rdma)
>      int idx;
>  
>      if (rdma->cm_id && rdma->connected) {
> -        if ((rdma->error_state ||
> -             migrate_get_current()->state == MIGRATION_STATUS_CANCELLING) &&
> -            !rdma->received_error) {
> -            RDMAControlHeader head = { .len = 0,
> -                                       .type = RDMA_CONTROL_ERROR,
> -                                       .repeat = 1,
> -                                     };
> -            error_report("Early error. Sending error.");
> -            qemu_rdma_post_send_control(rdma, NULL, &head);
> -        }
> -
>          rdma_disconnect(rdma->cm_id);
>          trace_qemu_rdma_cleanup_disconnect();
>          rdma->connected = false;
> -- 
> 1.8.3.1
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK