Re: CVS commit: src/sys/dev/ic

[Jason Thorpe <thorpej%shagadelic.org@localhost>]

On Mar 20, 2009, at 9:28 AM, Izumi Tsutsui wrote:

> Module Name:    src
> Committed By:   tsutsui
> Date:           Fri Mar 20 16:28:57 UTC 2009
>
> Modified Files:
>         src/sys/dev/ic: z8530sc.c z8530tty.c
>
> Log Message:
> Try to avoid zstty hangs on higher speed:
>
> z8530sc.c:
> Check pending interrupts in a loop until all requests are handled.
> The old comments said it would cause horrible latency to sun3x  
> floppy etc,
> but serial ports should have higher priority than disks anyway.

I think the issue is that sun3x floppies use pseudo-DMA, and the  
interrupts need to be serviced VERY quickly.

-- thorpej