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From: Con Kolivas <conman@kolivas.net>
Reply-To: conman@kolivas.net
To: Andrew Morton <akpm@digeo.com>
Subject: Re: Pathological case identified from contest
Date: Sun, 20 Oct 2002 12:59:13 +1000
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Cc: Rik van Riel <riel@conectiva.com.br>,
       linux kernel mailing list <linux-kernel@vger.kernel.org>
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On Thu, 17 Oct 2002 05:35 pm, you wrote:
> Con Kolivas wrote:
> > ...
> > Well this has become more common with 2.5.43-mm2. I had to abort the
> > process_load run 3 times when benchmarking it. Going back to other
> > kernels and trying them it didnt happen so I dont think its my hardware
> > failing or something like that.
>
> No, it's a bug in either the pipe code or the CPU scheduler I'd say.
>
> You could try backing out to the 2.5.40 pipe implementation; not sure if
> that would tell us much though.

I massaged the patch a little for it to apply and  it _is_ the offending code. 
Backing out the pipe changes fixed the problem. I was unable to reproduce the 
holdup I was seeing with process_load even at higher data sizes. Now what?

Con
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