Date: Sun, 2 Aug 1998 19:23:27 +0200 From: Philippe Regnauld <regnauld@deepo.prosa.dk> To: "Justin T. Gibbs" <gibbs@narnia.plutotech.com> Cc: current@FreeBSD.ORG Subject: Re: system lock-up (SMP, AHC_TAGENABLE, softupdates) Message-ID: <19980802192327.02628@deepo.prosa.dk> In-Reply-To: <199808021711.LAA07746@narnia.plutotech.com>; from Justin T. Gibbs on Sun, Aug 02, 1998 at 11:11:39AM -0600 References: <19980802172204.50682@deepo.prosa.dk> <199808021711.LAA07746@narnia.plutotech.com>
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Justin T. Gibbs writes:
>
> Assuming it is an AHC problem. I had a freeze not to long ago
Well, last time I had these problems (before USENIX) I was running without
SOFTUPDATES, and I had error messages like:
ordered tag queued
ordered tag send
SCB 0x4 timed out
...
(machine locked, with messages looping).
This does not happen with a NCR875 and the maximum number of
tags enabled.
> Using tagged queuing may exacerbate the problem (most likely by tying
> up more kernel resources for pending I/O), but I doubt it is the root
> of the problem.
I'll do more tests.
--
-[ Philippe Regnauld / sysadmin / regnauld@deepo.prosa.dk / +55.4N +11.3E ]-
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