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

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:

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

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