kstat_io
kstat_io_t kstat_io;
mdb_vread(&kstat_io, sizeof (kstat_io),
mdb_printf("No. of bytes read: %9llu\n", kstat_io.nread);
mdb_printf("No. of read operations: %9lu\n", kstat_io.reads);
kstat_io.nwritten);
mdb_printf("No. of write operations: %9lu\n", kstat_io.writes);
_NOTE(SCHEME_PROTECTS_DATA("private mutex", kstat_io))