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From: "Paolo Ciarrocchi" <ciarrocchi@linuxmail.org>
To: akpm@digeo.com, arashi@arashi.yi.org
Cc: linux-kernel@vger.kernel.org
Date: Sun, 22 Dec 2002 09:09:59 +0800
Subject: Re: 2.5.52, load and process in D state
Sender: linux-kernel-owner@vger.kernel.org
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From: Andrew Morton <akpm@digeo.com>
> Paolo Ciarrocchi wrote:
> > 
> > Hi all,
> > I booted 2.5.52 with the following parmater:
> > apm=off mem=32M (not sure about the amount, anyway I can reproduce
> > the problem for sure with 32M and 40M)
> > 
> > Then I tried the osdb (www.osdb.org) benchmark with
> > 40M of data.
> > 
> > $./bin/osdb-pg --nomulti
> > 
> > the result is that aftwer a few second running top I see the postmaster
> > process in D state and a lot if iowait.
> 
> What exactly _is_ the issue?  The machine is achieving 25% CPU utilisation
> in user code, 6-9% in system code.  It is doing a lot of I/O, and is
> getting work done.

The issue it that with 2.4.19 the postmaster process never go in D state
and iowait always reports 0%.
Sounds strange with me.

Ciao,
       Paolo 

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