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Message-ID: <20070522102530.GB2344@elte.hu>
Date: Tue, 22 May 2007 12:25:30 +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:
> > > there was nothing else running on the system - so i suspect the
> > > swapin activity flagged 'itself' as some 'other' activity and
> > > stopped? The swapins happened in 4 bursts, separated by 5 seconds
> > > total idleness.
> >
> > I've noted burst swapins separated by some seconds of pause in my
> > desktop system too (with sp_tester and an idle gnome).
>
> That really is expected, as just about anything, including journal
> writeout, would be enough to put it back to sleep for 5 more seconds.
note that nothing like that happened on my system - in the
swap-prefetch-off case there was _zero_ IO activity during the sleep
period.
Ingo
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