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Date:      Tue, 4 Nov 2003 17:34:08 -0800
From:      Kris Kennaway <kris@obsecurity.org>
To:        ticso@cicely.de
Cc:        Kris Kennaway <kris@obsecurity.org>
Subject:   Re: New alpha 5.x bug
Message-ID:  <20031105013408.GA72898@rot13.obsecurity.org>
In-Reply-To: <20031104233146.GL42463@cicely12.cicely.de>
References:  <20031101103955.GA42891@rot13.obsecurity.org> <20031104031740.GA67484@rot13.obsecurity.org> <20031104124826.GH42463@cicely12.cicely.de> <20031104175552.GA70699@rot13.obsecurity.org> <20031104221251.GJ42463@cicely12.cicely.de> <20031104221826.GC15210@freebie.xs4all.nl> <20031104230040.GK42463@cicely12.cicely.de> <20031104231848.GA72581@rot13.obsecurity.org> <20031104233146.GL42463@cicely12.cicely.de>

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On Wed, Nov 05, 2003 at 12:31:47AM +0100, Bernd Walter wrote:

> The question is what kind of bug this is to only trigger on the port
> cluster.

A statistically unlikely one.  40 packages out of 7500 is a very low
hit rate..that's about 5 packages per machine over a week (duration of
the build), so you'd probably have to run a single machine for a day
or more under the right load pattern in order to trigger it.

> vm/pipe sounds reasonable to believe for this kind of corruption, but
> it never happened for me.
> Possibly I'm not pushing vm that much.
> I wonder if setting vm.idlezero_enable=0 has an influence - this will
> not change the danger of this bug, but if it changes sympotoms might
> give a good indication of the direction to search.

I'll give that a try.  I suppose I'll have to revert the machines to
an older -current to get away from the latest (DDB?) bugs.

Kris

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