From: Rik van Riel <riel@conectiva.com.br>
To: Andrew Morton <akpm@zip.com.au>
Cc: Scott Kaplan <sfkaplan@cs.amherst.edu>,
Christoph Hellwig <hch@lst.de>,
linux-mm@kvack.org
Subject: Re: [RFC] start_aggressive_readahead
Date: Mon, 29 Jul 2002 05:04:23 -0300 (BRT) [thread overview]
Message-ID: <Pine.LNX.4.44L.0207290503150.3086-100000@imladris.surriel.com> (raw)
In-Reply-To: <3D44F01A.C7AAA1B4@zip.com.au>
On Mon, 29 Jul 2002, Andrew Morton wrote:
> > Similarly, you would want to be very
> > cautious about increasing the size of the read-ahead window of many pages
> > at the end of the inactive list are being re-used.
>
> I tend to think that if pages at the tail of the LRU are being
> referenced with any frequency we've goofed anyway. There are
> many things apart from readahead which will allocate pages, yes?
It would be a useful thing to measure, though.
We can use this information to decide to:
1) reduce readahead and, if if the situation continues
2) do load control
regards,
Rik
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next prev parent reply other threads:[~2002-07-29 8:04 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-25 16:10 Christoph Hellwig
2002-07-25 16:44 ` Rik van Riel
2002-07-25 19:40 ` Andrew Morton
2002-07-26 16:50 ` Scott Kaplan
2002-07-26 19:38 ` Andrew Morton
2002-07-28 23:32 ` Scott Kaplan
2002-07-29 0:19 ` Rik van Riel
2002-07-29 2:12 ` Scott Kaplan
2002-07-29 3:05 ` Rik van Riel
2002-07-29 15:24 ` Scott Kaplan
2002-07-29 7:34 ` Andrew Morton
2002-07-29 7:37 ` Vladimir Dergachev
2002-07-29 7:53 ` Andrew Morton
2002-07-29 8:04 ` Rik van Riel [this message]
2002-07-30 16:11 ` Scott Kaplan
2002-07-30 16:21 ` Martin J. Bligh
2002-07-30 16:38 ` Scott Kaplan
2002-07-30 16:52 ` Martin J. Bligh
2002-08-05 18:54 ` Scott Kaplan
2002-07-30 17:13 ` William Lee Irwin III
2002-07-26 20:14 ` Stephen Lord
2002-07-26 20:29 ` Andrew Morton
2002-07-26 6:53 ` Daniel Phillips
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