From: Dean Gaudet <dgaudet-list-linux-kernel@arctic.org>
To: "Stephen C. Tweedie" <sct@dcs.ed.ac.uk>
Cc: "Eric W. Biederman" <ebiederm+eric@npwt.net>,
Richard Gooch <Richard.Gooch@atnf.CSIRO.AU>,
linux-kernel@vger.rutgers.edu, linux-mm@kvack.org
Subject: Re: Thread implementations...
Date: Thu, 25 Jun 1998 13:31:59 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.3.96dg4.980625132735.17730U-100000@twinlark.arctic.org> (raw)
In-Reply-To: <199806251135.MAA00851@dax.dcs.ed.ac.uk>
On Thu, 25 Jun 1998, Stephen C. Tweedie wrote:
> Hi,
>
> On 24 Jun 1998 23:56:28 -0500, ebiederm+eric@npwt.net (Eric
> W. Biederman) said:
>
> > mmap, madvise(SEQUENTIAL),write
> > is easy to implement. The mmap layer already does readahead, all we
> > do is tell it not to be so conservative.
>
> Swap readhead is also now possible. However, madvise(SEQUENTIAL) needs
> to do much more than this; it needs to aggressively track what region of
> the vma is being actively used, and to unmap those areas no longer in
> use.
Remember it's *regions* not just a region. An http/ftp server sends the
same file over and over and over. There are many cursors moving
sequentially within the same file. A threaded http/ftp server will have a
single mmap, and multiple users of that mmap.
Dean
next prev parent reply other threads:[~1998-06-25 20:08 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <199806240915.TAA09504@vindaloo.atnf.CSIRO.AU>
[not found] ` <Pine.LNX.3.96dg4.980624025515.26983E-100000@twinlark.arctic.org>
[not found] ` <199806241213.WAA10661@vindaloo.atnf.CSIRO.AU>
1998-06-24 22:00 ` Eric W. Biederman
1998-06-24 23:41 ` Richard Gooch
1998-06-25 4:45 ` Eric W. Biederman
1998-06-25 17:14 ` Todd Larason
1998-06-26 7:53 ` Christoph Rohland
1998-06-26 14:16 ` Eric W. Biederman
1998-06-29 10:19 ` Stephen C. Tweedie
1998-06-30 6:19 ` Eric W. Biederman
1998-06-30 13:10 ` Stephen C. Tweedie
1998-06-30 19:35 ` Dean Gaudet
1998-07-01 9:09 ` Stephen C. Tweedie
1998-06-25 4:12 ` Dean Gaudet
1998-06-25 3:53 ` Richard Gooch
1998-06-25 11:32 ` Stephen C. Tweedie
1998-06-25 21:24 ` Chris Wedgwood
1998-06-25 22:16 ` Richard Gooch
1998-06-25 4:56 ` Eric W. Biederman
1998-06-25 11:35 ` Stephen C. Tweedie
1998-06-25 20:31 ` Dean Gaudet [this message]
1998-06-30 6:40 ` Eric W. Biederman
1998-06-30 19:30 Larry McVoy
1998-07-01 8:50 ` Stephen C. Tweedie
1998-07-03 15:21 ` Rik van Riel
1998-07-03 20:05 ` Stephen C. Tweedie
1998-07-03 20:36 ` Rik van Riel
1998-07-04 16:37 ` Stephen C. Tweedie
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