Date: Mon, 13 Feb 2006 15:04:57 -0800
From: Andrew Morton <akpm@osdl.org>
To: Johannes Stezenbach <js@linuxtv.org>
Cc: lkml@rtr.ca, dgc@sgi.com, linux-kernel@vger.kernel.org,
       linux-fsdevel@vger.kernel.org
Subject: Re: dirty pages (Was: Re: [PATCH] Prevent large file writeback
 starvation)
Message-Id: <20060213150457.547ddfb4.akpm@osdl.org>
In-Reply-To: <20060213224835.GC5565@linuxtv.org>
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	<43E75FB6.2040203@rtr.ca>
	<20060206121133.4ef589af.akpm@osdl.org>
	<20060213135925.GA6173@linuxtv.org>
	<20060213120847.79215432.akpm@osdl.org>
	<20060213224835.GC5565@linuxtv.org>
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Johannes Stezenbach <js@linuxtv.org> wrote:
>
> On Mon, Feb 13, 2006, Andrew Morton wrote:
>  > Johannes Stezenbach <js@linuxtv.org> wrote:
>  > > Now copying a 700MB file makes "Dirty" go up to 350MB. It then
>  > > slowly decreases to 325MB and stays there.
>  > 
>  > It shouldn't.  Did you really leave it for long enough?
>  > 
>  > If you did, then why does it happen there and not here?
> 
>  Good question. I just repeated the execise, rebooted and
>  copied a 700MB file. After ~30min "Dirty" is down to ~130MB, and
>  continues to decrease very slowly.
> 
>  On my Desktop machine (P4 HT, 1G RAM) "Dirty" goes down near
>  zero after ~30sec, as expected.

Are you using any unusual mount options?

Which filesystem types are online (not that this should affect it...)
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