lib_ring_buffer_align_ctx(ctx, lttng_alignof(user_ns_inum));
chan->ops->event_write(ctx, &user_ns_inum, sizeof(user_ns_inum));
lib_ring_buffer_align_ctx(ctx, lttng_alignof(user_ns_inum));
chan->ops->event_write(ctx, &user_ns_inum, sizeof(user_ns_inum));