Date: Thu, 10 Oct 1996 07:48:45 +1000 From: Bruce Evans <bde@zeta.org.au> To: gibbs@freefall.freebsd.org, nate@mt.sri.com Cc: current@FreeBSD.org Subject: Re: SIO problems Message-ID: <199610092148.HAA25087@godzilla.zeta.org.au>
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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()). Brucehome | help
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