Re: [PATCH v3 09/18] migration/rdma: add multifd_rdma_load_setup() to setup multifd rdma

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

* Chuan Zheng (zhengchuan@huawei.com) wrote:
> Signed-off-by: Chuan Zheng <zhengchuan@huawei.com>

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

> ---
>  migration/rdma.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 52 insertions(+)
> 
> diff --git a/migration/rdma.c b/migration/rdma.c
> index ad4e4ba..2baa933 100644
> --- a/migration/rdma.c
> +++ b/migration/rdma.c
> @@ -4010,6 +4010,48 @@ static void rdma_accept_incoming_migration(void *opaque)
>      }
>  }
>  
> +static bool multifd_rdma_load_setup(const char *host_port,
> +                                    RDMAContext *rdma, Error **errp)
> +{
> +    int thread_count;
> +    int i;
> +    int idx;
> +    MultiFDRecvParams *multifd_recv_param;
> +    RDMAContext *multifd_rdma;
> +
> +    if (!migrate_use_multifd()) {
> +        return true;
> +    }
> +
> +    if (multifd_load_setup(errp) != 0) {
> +        /*
> +         * We haven't been able to create multifd threads
> +         * nothing better to do
> +         */
> +        return false;
> +    }
> +
> +    thread_count = migrate_multifd_channels();
> +    for (i = 0; i < thread_count; i++) {
> +        if (get_multifd_recv_param(i, &multifd_recv_param) < 0) {
> +            ERROR(errp, "rdma: error getting multifd_recv_param(%d)", i);
> +            return false;
> +        }
> +
> +        multifd_rdma = qemu_rdma_data_init(host_port, errp);
> +        for (idx = 0; idx < RDMA_WRID_MAX; idx++) {
> +            multifd_rdma->wr_data[idx].control_len = 0;
> +            multifd_rdma->wr_data[idx].control_curr = NULL;
> +        }
> +        /* the CM channel and CM id is shared */
> +        multifd_rdma->channel = rdma->channel;
> +        multifd_rdma->listen_id = rdma->listen_id;
> +        multifd_recv_param->rdma = (void *)multifd_rdma;
> +    }
> +
> +    return true;
> +}
> +
>  void rdma_start_incoming_migration(const char *host_port, Error **errp)
>  {
>      int ret;
> @@ -4057,6 +4099,16 @@ void rdma_start_incoming_migration(const char *host_port, Error **errp)
>          qemu_rdma_return_path_dest_init(rdma_return_path, rdma);
>      }
>  
> +    /* multifd rdma setup */
> +    if (!multifd_rdma_load_setup(host_port, rdma, &local_err)) {
> +        /*
> +         * We haven't been able to create multifd threads
> +         * nothing better to do
> +         */
> +        error_report_err(local_err);
> +        goto err;
> +    }
> +
>      qemu_set_fd_handler(rdma->channel->fd, rdma_accept_incoming_migration,
>                          NULL, (void *)(intptr_t)rdma);
>      return;
> -- 
> 1.8.3.1
> 
-- 
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK