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Subject: Re: Poor performance during disk writes
From: Robert Love <rml@tech9.net>
To: Dieter N?tzel <Dieter.Nuetzel@hamburg.de>
Cc: vda <vda@port.imtp.ilyichevsk.odessa.ua>,
        Helge Hafting <helgehaf@idb.hist.no>, jlm <jsado@mediaone.net>,
        Andre Hedrick <andre@linuxdiskcert.org>,
        Linux Kernel List <linux-kernel@vger.kernel.org>
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On Thu, 2001-12-20 at 09:35, Dieter N?tzel wrote:

> > Robert maintains latency measurement patch, do you use it?
> 
> Yes, I did the ReiserFS lock-break tests for him.
>  
> > Does it show where are the problems?
> 
> NO, we have no clue, yet :-(

Want to see if its the VM?  Rik van Riel has updated his 2.4-ac VM for
new kernels and added reverse page mapping (a neat feature).

It is available at:
	http://www.surriel.com/patches/2.4/2.4.16-rmap-6

Give it a whirl, you might me impressed.  If not, maybe we can scratch
the VM as the problem and stare meanly at VFS ;-)

(Note my lock-break patch will fail on the new VM.  Ignore it.  The rest
is still fine. Perhaps I'll do a lock-break for this VM later).

	Robert Love

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