From owner-freebsd-sparc64@FreeBSD.ORG  Sat Jul  2 19:39:34 2005
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To: sparc64@freebsd.org
From: Marcel Moolenaar <marcel@xcllnt.net>
Date: Sat, 2 Jul 2005 12:39:32 -0700
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Subject: ATA interrupt storm after making a kernel dump
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gang,

I got the following when manually creating a kernel core dump from
within DDB:

\begin{console}
FreeBSD/sparc64 (u5.pn.xcllnt.net) (ttyu1)

login: ~KDB: enter: Break sequence on console
[thread pid 23 tid 100011 ]
Stopped at      kdb_enter+0x3c: ta              %xcc, 1
db> call doadump
Dumping 256 MB (1 chunks)
   chunk at 0: 268435456 bytes ... ok

Dump complete
= 0xa
db> c
Interrupt storm detected on "vec2016: atapci0"; throttling interrupt 
source
FreeBSD/sparc64 (u5.pn.xcllnt.net) (ttyu1)

login:
\end{console}

I don't get the interrupt storm triggered on any of the other platforms
I can test. It may not be worth looking into. On the other hand, it may
be symptomatic for more fundamental problems.

Details about the machine can be found here:
	http://www.xcllnt.net/~marcel/machines/u5

FYI,

-- 
  Marcel Moolenaar         USPA: A-39004          marcel@xcllnt.net