From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Benjamin LaHaise <bcrl@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>, linux-kernel@vger.kernel.org
Subject: Re: Memory management in Kernel 2.4.x
Date: 27 May 2002 23:50:31 +0100 [thread overview]
Message-ID: <1022539831.4123.4.camel@irongate.swansea.linux.org.uk> (raw)
In-Reply-To: <20020527173306.C15560@redhat.com>
On Mon, 2002-05-27 at 22:33, Benjamin LaHaise wrote:
> On Mon, May 27, 2002 at 02:22:22PM -0700, H. Peter Anvin wrote:
> > Well, if you can't fork a new process because that would push you into
> > overcommit, then you usually can't actually do anything useful on the
> > machine.
>
> Just use vfork or clone + exec. It's faster and uses less memory.
In the general case a fork doesn't cause too much overcommit. Most of
the binary is mapped read-only as is a lot of the library space. Since
its read only and backed by a file it has zero cost. If you mprotect it
then you pay at mprotect time
next prev parent reply other threads:[~2002-05-27 21:47 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <fa.iklie8v.5k2hbj@ifi.uio.no>
[not found] ` <fa.na0lviv.e2a93a@ifi.uio.no>
2002-05-27 12:58 ` Andreas Hartmann
2002-05-27 13:45 ` Peter Wächtler
2002-05-27 15:25 ` Alan Cox
2002-05-27 14:37 ` Peter Wächtler
2002-05-27 21:22 ` H. Peter Anvin
2002-05-27 21:33 ` Benjamin LaHaise
2002-05-27 21:34 ` H. Peter Anvin
2002-05-27 21:37 ` Benjamin LaHaise
2002-05-27 21:39 ` H. Peter Anvin
2002-05-27 22:50 ` Alan Cox [this message]
2002-05-27 21:56 ` William Lee Irwin III
2002-05-27 23:07 ` Alan Cox
2002-05-27 22:48 ` Alan Cox
2002-06-05 13:33 ` Bill Davidsen
2002-05-31 21:19 ` Andrea Arcangeli
2002-06-01 12:35 ` Andreas Hartmann
2002-06-01 22:59 ` Andrea Arcangeli
2002-06-01 13:12 ` Andreas Hartmann
2002-06-03 8:11 ` Peter Wächtler
2002-05-28 14:46 Dmitry Volkoff
[not found] <fa.n12rl6v.9644rg@ifi.uio.no>
[not found] ` <fa.jd9c9pv.190gl8n@ifi.uio.no>
2002-05-28 5:42 ` Andreas Hartmann
2002-05-28 11:49 ` Alan Cox
2002-05-28 18:14 ` Andreas Hartmann
[not found] <fa.huj8e2v.10ggghn@ifi.uio.no>
[not found] ` <fa.o5cc8mv.12h4to1@ifi.uio.no>
2002-05-27 12:10 ` Andreas Hartmann
2002-05-27 11:52 ` Zwane Mwaikambo
-- strict thread matches above, loose matches on Subject: below --
2002-05-27 9:40 Andreas Hartmann
2002-05-27 10:28 ` Florian Weimer
2002-05-27 12:02 ` Alan Cox
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