From: "Stephen C. Tweedie" <sct@redhat.com>
To: linux@horizon.com
Cc: riel@conectiva.com.br, linux-mm@kvack.org
Subject: Re: Heard about the 2Q algorithm?
Date: Thu, 8 Jun 2000 20:04:58 +0100 [thread overview]
Message-ID: <20000608200458.P3886@redhat.com> (raw)
In-Reply-To: <20000608175632.19821.qmail@science.horizon.com>; from linux@horizon.com on Thu, Jun 08, 2000 at 05:56:32PM -0000
Hi,
On Thu, Jun 08, 2000 at 05:56:32PM -0000, linux@horizon.com wrote:
>
>
> The idea is that the FIFO absorbs sequential scans and filters out the
> initial burst of accesses. Only if access to the page is *prolonged*
> do we consider it for longer-term cacheing.
Page aging does that. The initial age of a page will be fairly low,
relative to pages which are constantly being accessed, and so will
be evicted from the cache before they can accumulate a high age if we
have a sequential access pattern.
--Stephen
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prev parent reply other threads:[~2000-06-08 19:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-06-08 17:56 Heard about the 2Q algorithm? linux
2000-06-08 19:04 ` Stephen C. Tweedie [this message]
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