On Thu, 6 Mar 1997, Brian B. Brown wrote:

> Hi All,
> 
> I just upgraded my Sparc IPX to 1.2C from 1.2ALPHA, and now I'm getting
> huge fifo overruns:
> 
> Mar  6 20:58:40 ipx /netbsd: zs0b: fifo overrun
> Mar  6 20:59:14 ipx last message repeated 2 times
> Mar  6 21:00:23 ipx last message repeated 12 times
> Mar  6 21:11:37 ipx last message repeated 42 times
> Mar  6 21:20:14 ipx last message repeated 89 times
> 
> This is seriously hurting my SLIP performance...it was not happening under
> 1.2ALPHA at all.  Any suggestions?

Since you are running the sparc zs driver (which hasn't changed recently
AFAIK), the most likely problem is that something has taken to locking out
interrupts for too long.

The fifo gets drained at a high level interrupt (level 12, I think), so
something must be camping out at splhigh. :-(

As I don't have a sparc, I can't help much more.

Take care,

Bill