Return-Path: <linux-kernel-owner+willy=40w.ods.org@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id <S262414AbSJTGVZ>; Sun, 20 Oct 2002 02:21:25 -0400
Received: (majordomo@vger.kernel.org) by vger.kernel.org
	id <S262415AbSJTGVZ>; Sun, 20 Oct 2002 02:21:25 -0400
Received: from c16688.thoms1.vic.optusnet.com.au ([210.49.244.54]:10891 "EHLO
	pc.kolivas.net") by vger.kernel.org with ESMTP id <S262414AbSJTGVY>;
	Sun, 20 Oct 2002 02:21:24 -0400
Content-Type: text/plain; charset=US-ASCII
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 16:27:08 +1000
User-Agent: KMail/1.4.3
Cc: Rik van Riel <riel@conectiva.com.br>,
       linux kernel mailing list <linux-kernel@vger.kernel.org>
References: <1034820820.3dae1cd4bc0e3@kolivas.net> <200210201259.34935.conman@kolivas.net> <3DB21D88.2E845F02@digeo.com>
In-Reply-To: <3DB21D88.2E845F02@digeo.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 7BIT
Message-Id: <200210201627.26445.conman@kolivas.net>
Sender: linux-kernel-owner@vger.kernel.org
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 1533
Lines: 45

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Sun, 20 Oct 2002 01:05 pm, Andrew Morton wrote:
> Con Kolivas wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > 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?
>
> Try Manfred's pipe fix I guess?
>

Well *that* makes sense. Tried it and it fixed it thank you.

Cheers,
Con
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.7 (GNU/Linux)

iD8DBQE9skzBF6dfvkL3i1gRAtbyAKCg6bIWNnEbZeFnRT2mcS7TkkBtsQCfatyT
m4Q37qYkOZ389DlcvluL9vA=
=PXfw
-----END PGP SIGNATURE-----
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/