Re: /netbsd: ser0: silo overflow

["Michael L. Hitch" <mhitch%msu.oscs.montana.edu@localhost>]

"Georges Heinesch" <geohei-ml%geohei.lu@localhost> writes: 
> And what about the DEV6_DEFER option.
> This one didn't show any change either ;(

  DEV6_DEFER?  or LEV6_DEFER?

  If anything makes any change, LEV6_DEFER should show a noticable difference
in silo overflows (unless something has been broken in the kernel).  That
option is supposed to force all the interrupt masking to a maximum of level
4, and the level 5 interrupt used by the serial port receiver will never
(well, hardly ever) be masked.  The level 6 interrupts generated by the
clock are handled by a very short routine that disables the level 6
interrupt and sets one of the level 4 audio interrupts.

  One other thing to be aware of regarding LEV6_DEFER - it's not a "defopt"
option, and changing that option requires a make clean when building a new
kernel.
---
Michael L. Hitch                        mhitch%montana.edu@localhost
Computer Consultant,  Information Technology Center
Montana State University, Bozeman, MT     USA