assert(kern->metadata->conf != NULL);
assert(kern->metadata->conf->attr.overwrite
== DEFAULT_CHANNEL_OVERWRITE);
assert(kern->metadata->conf->attr.subbuf_size
assert(kern->metadata->conf != NULL);
assert(kern->metadata->conf->attr.overwrite
== DEFAULT_CHANNEL_OVERWRITE);
assert(kern->metadata->conf->attr.subbuf_size