From owner-freebsd-stable  Sun Nov 19 18:19:20 2000
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Date: Sun, 19 Nov 2000 21:19:14 -0500
From: mike ryan <msr@elision.org>
To: Warner Losh <imp@village.org>
Cc: stable@FreeBSD.ORG
Subject: Re: 4.2-BETA hangs on boot
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On 11/19/00, Warner Losh wrote:
> In message <20001119193941.A38978@medianstrip.net> mike ryan writes:
> : i'm not entirely sure i understand.  "pnp o/s = no" causes the bios
> : to assign an irq to the pcic controller, meaning the pcic controller
> : raises that interrupt on insertions/removals, but the driver,
> : operating in polling mode, never clears the interrupt so the machine
> : wedges trying to service it?  if this is correct, how does ddb
> : manage to unwedge things?
> 
> I'm not sure.  I suspect that it is assigning other interrupts
> differently.  I'm not entirely sure.

now i definitely don't understand.  is this a response to the first
question?

how could interrupt assignments to other devices cause wedges on
card insertion events?

> : the fix in -current is the pci interrupt routing code which allows
> : us to set "pnp os = yes" in the bios and let freebsd make irq
> : assignments only for devices it understands?
> 
> FreeBSD -current doesn't support this just yet.

okay...  so what is the circa-bsdcon interrupt-related fix in
-current to which you referred then?


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