dump_start
error = dump_start(di, &kdh);
error = dump_start(di, &kdh);
error = dump_start(di, &kdh);
error = dump_start(di, &kdh);
error = dump_start(di, &kdh);
error = dump_start(di, &kdh);
error = dump_start(di, &kdh);
int dump_start(struct dumperinfo *di, struct kerneldumpheader *kdh);