From: Con Kolivas <conman@kolivas.net>
To: Andrew Morton <akpm@digeo.com>
Cc: Rik van Riel <riel@conectiva.com.br>,
linux kernel mailing list <linux-kernel@vger.kernel.org>
Subject: Re: Pathological case identified from contest
Date: Sun, 20 Oct 2002 12:59:13 +1000 [thread overview]
Message-ID: <200210201259.34935.conman@kolivas.net> (raw)
In-Reply-To: <3DAE6826.72C345EE@digeo.com>
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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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next prev parent reply other threads:[~2002-10-20 2:53 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-17 2:13 Pathological case identified from contest Con Kolivas
2002-10-17 2:49 ` Andrew Morton
2002-10-17 4:26 ` Con Kolivas
2002-10-17 7:16 ` Con Kolivas
2002-10-17 7:35 ` Andrew Morton
2002-10-17 17:15 ` Rik van Riel
2002-10-20 2:59 ` Con Kolivas [this message]
2002-10-20 3:05 ` Andrew Morton
2002-10-20 6:27 ` Con Kolivas
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