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Date: Wed, 18 Apr 2001 20:40:02 +0200
From: Giuliano Pochini <pochini@denise.shiny.it>
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To: SodaPop <soda@xirr.com>
CC: Pavel Machek <pavel@suse.cz>, linux-kernel@vger.kernel.org
Subject: Re: Oscillations in disk write compaction, poor interactive performance
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> The problem is that at the low point in the cycle, the machine is
> unusable.  It is utterly unresponsive until the writes complete, which can
> take a very long time (in the case of the ppc machine, several minutes!)
> Anything that does disk I/O will block for a long time - having 'ls' take
> two minutes is not a good thing.

Can you chack how much cpu time do dbflush and kswapd get ?

> 2.2 does not exhibit this behaviour.

2.2 is much worse IMO.

Bye.

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