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Date: Sun, 20 Sep 1998 00:16:27 -0700
To: KATO Takenori <kato@ganko.eps.nagoya-u.ac.jp>, gibbs@narnia.plutotech.com
From: Manfred Antar <mantar@netcom.com>
Subject: Re: [CAM] Broken tagged queuing drive?
Cc: current@FreeBSD.ORG
In-Reply-To: <19980920154842T.kato@gneiss.eps.nagoya-u.ac.jp>
References: <Your message of "Sat, 19 Sep 1998 22:42:38 -0600 (MDT)"<199809200442.WAA06694@narnia.plutotech.com>
 <199809200442.WAA06694@narnia.plutotech.com>
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At 03:48 PM 9/20/98 +0900, KATO Takenori wrote:
>"Justin T. Gibbs" <gibbs@narnia.plutotech.com> wrote:
>
>> I believe I've found the cause of this panic.  I would appreciate it if
>> you could test to see if the next revision of aic7xxx.c survives the
>> timeout.
>
>The panic went away.
>
>
>> My guess is that the SAMSUNG blows away other pending transactions when
>> it sends a queue full message.  You may want to try setting maxtags
>> to a value that will avoid the queue full response (perhaps 32 or 31).
>
>The value 32 works without problem.
>
>Thanks!
>
I just built a kernel with this new code.
The machine just goes into a panic on boot
right after ffs_mountfs: superblock updated

The machine is a Intel PR440FX SMP-pentiumpro 200mhz
DPT controller -->da0
softupdates on all partitions

and built in adaptec 7880 connected to a CDROM
I can't get to the debugger as it just keeps scrolling.
something about boot called on cpu0 and lock something.
 I can't read it as it is scrolling too fast.
This is with current sources
A kernel built just before the aic7xxx.c commit worked fine.
Manfred
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