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From: Jonathan Morton <chromi@cyberspace.org>
To: "Gabriel.Leen" <Gabriel.Leen@ul.ie>, linux-mm@kvack.org
Subject: RE: Process not given >890MB on a 4MB machine ?????????
Date: Mon, 24 Sep 2001 23:16:15 +0100	[thread overview]
Message-ID: <a05100302b7d55fc15ab3@[192.168.239.101]> (raw)
In-Reply-To: <5D2F375D116BD111844C00609763076E050D167E@exch-staff1.ul.ie>

>	Unfortunately my program which is doing "alot" of calculations still
>needs more space,
>
>	Is there some way to enable 64 bit support (or something) and get
>the swap space active,
>	and give it another GB or so ?

Nope, I doubt it.  The x86 architecture is fundamentally 32-bit, and 
thus can't address more than 4Gb for a single process - 1Gb of that 
address space is reserved for the kernel.  You can confirm this by 
looking at the result of sizeof(void*).

You will either need to use a true 64-bit machine (POWER, Alpha, 
UltraSPARC or MIPS) or rewrite your program to use large files 
instead of large amounts of memory.  I suspect the latter would be 
less costly.

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  reply	other threads:[~2001-09-24 22:16 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-09-24 21:15 Gabriel.Leen
2001-09-24 22:16 ` Jonathan Morton [this message]
     [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 22:41 Gabriel.Leen
2001-09-24 21:16 ` Joseph A Knapka
2001-09-25 10:59   ` Stephen C. Tweedie
2001-09-25 17:36     ` afei
2001-09-26  7:04       ` Eric W. Biederman
2001-09-26  8:53       ` Stephen C. Tweedie
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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