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From: Steve Passe <smp@csn.net>
To: Keith Mitchell <kmitch@weenix.guru.org>
cc: gibbs@freebsd.org, smp@freebsd.org, scsi@freebsd.org
Subject: Re: Freezes/Reboots with -current ahc driver 
In-reply-to: Your message of "Tue, 22 Apr 1997 15:05:51 EDT."
             <199704221905.PAA02398@weenix.guru.org> 
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Date: Tue, 22 Apr 1997 13:36:25 -0600
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Hi,

> > what backup tool are you using when it crashes?
> 
> I am using amanda 2.3.0.4 as the backup program which in turn uses
> dump.  None of the drives are mounted via NFS.
> 
> I do have APIC_IO turned on.
> 
> After I turned on the comconsole and ddb stuff I found out that it was
> panicing (it looks like in the SMP stuff).  The controller card is a
> 3940UW.  I did have toi patch the mp_machdep.c file for the PCI-PCI
> bridge.
> 
> The panic message is:
> 
> apicIPI is stuck
> panic(cpu#0):
> 
> boot() called on cpu#0
> 
> What should I look for in DDB??

you are hitting the known "APIC_IO/heavy IO deadlock" problem.
I'll think more about a solution.  In the meantime you could try a non_APIC_IO
kernel, that should solve the problem for now...

--
Steve Passe	| powered by
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