From owner-freebsd-hackers  Tue May 29 14: 2:29 2001
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Date: Tue, 29 May 2001 14:02:11 -0700 (PDT)
From: John Baldwin <jhb@FreeBSD.ORG>
To: Richard Hodges <rh@matriplex.com>
Subject: RE: Stuck in kernel - mask problem?
Cc: hackers@FreeBSD.ORG
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On 28-May-01 Richard Hodges wrote:
> I have been having a problem on one of my machines, and it seems
> to be associated with medium/heavy IO loads.
> 
> After some period of time, usually an hour or two, the system will
> appear to stop cold dead.  A trace with DDB shows that the last
> function is doreti.  Above that is the DDB call stuff.
> 
> Once, the trace was simply doreti, other times it had the stack
> of the ata and network drivers.  Here are some values from one
> that might be useful:
> 
>         cpl = 6714ba  (3, 7, 9, 10, 12, 14, 15 active, right?)
>    ipending = 401420  (nothing pending, right?)
>  astpending = 3
> in_vm86call = 0
> intr_nesting_level = 2

If astpending is set, we keep looping on the x86 in doreti.  It looks like
astpending might not be getting cleared or some such.

-- 

John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/
PGP Key: http://www.Baldwin.cx/~john/pgpkey.asc
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/

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