From: "Stephen C. Tweedie" <sct@redhat.com>
To: Joseph A Knapka <jknapka@earthlink.net>
Cc: "Gabriel.Leen" <Gabriel.Leen@ul.ie>,
"'linux-mm@kvack.org'" <linux-mm@kvack.org>
Subject: Re: Process not given >890MB on a 4MB machine ?????????
Date: Tue, 25 Sep 2001 11:59:14 +0100 [thread overview]
Message-ID: <20010925115914.F3437@redhat.com> (raw)
In-Reply-To: <3BAFA2CA.FAA0D9CB@earthlink.net>; from jknapka@earthlink.net on Mon, Sep 24, 2001 at 09:16:58PM +0000
Hi,
On Mon, Sep 24, 2001 at 09:16:58PM +0000, Joseph A Knapka wrote:
> No. You still only get a maximum of 4GB of -virtual- space per
> process. The machine can address up to 64GB of -physical- RAM,
> but a single process (actually a single page directory) can
> see only 4GB at a time. Sorry :-(
There are hacks to work around this --- for example, you can set up
large amounts of shared memory and map that on demand when you are
looking up your dataset. However, it's simply not possible for user
space to refer to more than 3GB at once on Linux/Intel. You *must* go
to a 64-bit architecture if you want more than that.
Cheers,
Stephen
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next prev parent reply other threads:[~2001-09-25 10:59 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-24 22:41 Gabriel.Leen
2001-09-24 21:16 ` Joseph A Knapka
2001-09-25 10:59 ` Stephen C. Tweedie [this message]
2001-09-25 17:36 ` afei
2001-09-26 7:04 ` Eric W. Biederman
2001-09-26 8:53 ` Stephen C. Tweedie
[not found] <5D2F375D116BD111844C00609763076E050D1681@exch-staff1.ul.ie>
2001-09-24 22:49 ` Rik van Riel
-- strict thread matches above, loose matches on Subject: below --
2001-09-24 21:15 Gabriel.Leen
2001-09-24 22:16 ` Jonathan Morton
2001-09-21 16:07 Gabriel.Leen
2001-09-22 2:01 ` Rik van Riel
2001-09-20 19:25 Gabriel.Leen
2001-09-20 19:56 ` brian
2001-09-20 20:36 ` Thierry Vignaud
2001-09-20 20:56 ` Benjamin LaHaise
2001-09-21 8:29 ` Eric W. Biederman
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