linux-kernel - Re: [PATCH] mm: swap prefetch improvements

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Message-ID: <20070522111230.GA15616@elte.hu>
Date:	Tue, 22 May 2007 13:12:30 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Con Kolivas <kernel@...ivas.org>
Cc:	Antonino Ingargiola <tritemio@...il.com>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Ray Lee <ray-lk@...rabbit.org>, ck list <ck@....kolivas.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] mm: swap prefetch improvements


* Con Kolivas <kernel@...ivas.org> wrote:
 
> > hm, what do you call 'journal writeout' here that would be happening 
> > on my system?
> 
> Not really sure what you have in terms of fs, but here even with 
> nothing going on, ext3 writes to disk every 5 seconds with kjournald.

i have ext3, but it doesnt do that on my box. Also, i would have noticed 
any IO activity in the 'swap prefetch off' case. When i said completely 
idle, i really meant it ;-)

so swap-prefetch stops for 5 seconds for no apparent reason.
 
	Ingo
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