From: Doug McNaught <doug@mcnaught.org>
To: Christoph Pleger <Christoph.Pleger@uni-dortmund.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Address space for user process
Date: Wed, 07 Jul 2004 10:46:56 -0400 [thread overview]
Message-ID: <87hdsjswm7.fsf@asmodeus.mcnaught.org> (raw)
In-Reply-To: <20040707163535.02323a8f.Christoph.Pleger@uni-dortmund.de> (Christoph Pleger's message of "Wed, 7 Jul 2004 16:35:35 +0200")
Christoph Pleger <Christoph.Pleger@uni-dortmund.de> writes:
> Hello,
>
> I read that - at least in Kernel 2.4 - the amount of memory that can be
> addressed by a user process is limited to 3 GB, no matter how much
> virtual memory is present. Is it possible to raise that limit?
That's limit of the ix86 architecture, not Linux. 64-bit systems
running Linux have no such limit.
That said, there are patches for 2.4 that create separate address
spaces for kernel and user (search for '4G/4G') at the cost of a
(sometimes significant) performance penalty. 4GB per-process is a
hard limit on 32-bit systems, so it's the most you'll get.
-Doug
next prev parent reply other threads:[~2004-07-07 14:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-07 14:35 Christoph Pleger
2004-07-07 14:46 ` Doug McNaught [this message]
2004-07-07 14:50 ` Richard B. Johnson
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