Re: spin lock panic in 5.2-REL

From: Peter Losher <Peter_Losher_at_isc.org>
Date: Tue, 27 Jan 2004 14:19:54 -0800
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On Tuesday 27 January 2004 10:34 am, John Baldwin wrote:

> This is a very hard to debug problem.  If WITNESS is on it provides more
> useful information that can help track that down, but I wouldn't expect a
> production machine to be using WITNESS.

Yes, I was running a kernel for a short while w/ INVARIANTS and WITNESS, but 
it was basically useless after a couple of hours under load under the giant 
lock.  How much of a performance hit is just WITNESS?

(I also got a "me too" message from someone privately who experianced the same 
issue after a 5.1->5.2 update)

- -Peter
- -- 
Peter_Losher_at_isc.org | ISC | OpenPGP 0xE8048D08 | "The bits must flow"
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Received on Tue Jan 27 2004 - 13:20:23 UTC

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