Symbol: za_hw_overrun
usr/src/uts/sun/io/zs_async.c
2069
za->za_hw_overrun++;
usr/src/uts/sun/io/zs_async.c
2298
if (za->za_hw_overrun > 10) {
usr/src/uts/sun/io/zs_async.c
2300
za->za_hw_overrun = 0;