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To: Bruce Evans <bde@zeta.org.au>
cc: nate@mt.sri.com, current@FreeBSD.org
Subject: Re: SIO problems 
In-reply-to: Your message of "Thu, 10 Oct 1996 07:48:45 +1000."
             <199610092148.HAA25087@godzilla.zeta.org.au> 
Date: Wed, 09 Oct 1996 15:04:33 -0700
From: "Justin T. Gibbs" <gibbs@freefall.freebsd.org>
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>>I thought this was a problem with the VM system sitting at splhigh()
>>too much.  I used to get these a long time ago, but they vanished
>
>It can't be that, because splhigh() doesn't mask "fast" interrupts.
>
>BTW, there is a problem with the PCI interrupt demultiplexor not
>supporting "fast" interrupts.  I tried running the cy driver with
>"slow" interrupts (a one line change to delate the line that sets
>RI_FAST).  The (12 byte) fifo was overrun by a factor of about 4
>for every syscons vt switch (because busy waiting is used to set
>the LEDs and the LEDs are set at spltty()).

Feel free to fix them then.  You can also merge the interrupt
registration code for all bus types too. 8-)

>
>Bruce

--
Justin T. Gibbs
===========================================
  FreeBSD: Turning PCs into workstations
===========================================