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Date:      Fri, 15 May 1998 22:15:46 +0930
From:      Matthew Thyer <thyerm@camtech.net.au>
To:        Philippe Regnauld <regnauld@deepo.prosa.dk>
Cc:        Kris Kennaway <kkennawa@physics.adelaide.edu.au>, Brian Feldman <brianfeldman@hotmail.com>, freebsd-current@FreeBSD.ORG
Subject:   Re: SoftUpdates stable??
Message-ID:  <355C38FA.DA8E21BA@camtech.net.au>
References:  <19980514215018.6031.qmail@m2.findmail.com> <Pine.OSF.3.90.980515104503.4457A-100000@spectrum.physics.adelaide.edu.au> <19980515115925.46642@deepo.prosa.dk>

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On a machine running CTM src-cur.3366 (which is after the recent VM
fixes AND with the new softupdates) I was unable to "make world"
for CTM src-cur.3369 with my root FS not using softupdates and my
only other partition (a 3GB /usr) using softupdates.

The machine paniced 17.46% of the way through (based on size of output).

I disabled softupdates and was able to make world 3369 with no
problems.

(I did forget to put async and noatime back on for this but the
build took only 2 hours 29 minutes - which is only 7 minutes slower
than the build from 3345 to 3366 which had async and noatime on!!
- It seems that async, noatime is not useful once you get reasonably
fast drives - IBM 6.48 Million bytes Ultra DMA [but only running at
mode 4] GMR heads - only 9.5ms ave seek but)

Philippe Regnauld wrote:
> 
> Kris Kennaway writes:
> >
> > a) The filesystem you're running softupdates on isnt mounted 'async'
> >
> > b) You're using the most recent version of the softupdates code from
> >    http://www.freebsd.org/~julian
> >
> > Since correcting the first problem, I've finished two 'make world -j8's
> > without a hitch. I'll run some more stress-tests over the weekend and see
> > if I can't get it to die, but so far I'm quite happy with what I see.
> 
>         No such luck.  -current as of yesterday (SMP), new kernel, softupdates,
>         no async, and I got up this morning to find the box stuck in
>         DDB -- I did a tr but didn't write down -- I was already late
>         for work :-|  But I do remember it concerned locking issues.
> 
>         I'll reproduce it tonight.
> 
> --
>  -[ Philippe Regnauld / sysadmin / regnauld@deepo.prosa.dk / +55.4N +11.3E ]-
>      «Pluto placed his bad dog at the entrance of Hades to keep the dead
>       IN and the living  OUT!  The archetypical corporate firewall?»
>                                                        - S. Kelly Bootle
> 
> To Unsubscribe: send mail to majordomo@FreeBSD.org
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-- 
/=====================================================================\
|Work: Matthew.Thyer@dsto.defence.gov.au | Home: thyerm@camtech.net.au|
\=====================================================================/
"If it is true that our Universe has a zero net value for all conserved
quantities, then it may simply be a fluctuation of the vacuum of some
larger space in which our Universe is imbedded. In answer to the
question of why it happened, I offer the modest proposal that our
Universe is simply one of those things which happen from time to time."
 E. P. Tryon   from "Nature" Vol.246 Dec.14, 1973

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