To: kilampka@gmail.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: Max mem space per process under  2.6.13-15.7-smp
References: <1141170947.23172.18.camel@pclampka.informatik.unibw-muenchen.de>
From: Douglas McNaught <doug@mcnaught.org>
Date: Tue, 28 Feb 2006 19:11:45 -0500
In-Reply-To: <1141170947.23172.18.camel@pclampka.informatik.unibw-muenchen.de> (Kai
 Lampka's message of "Wed, 01 Mar 2006 00:55:47 +0100")
Message-ID: <87zmkbm3b2.fsf@suzuka.mcnaught.org>
User-Agent: Gnus/5.1006 (Gnus v5.10.6) Emacs/21.4 (gnu/linux)
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 900
Lines: 25

Kai Lampka <kilampka@gmail.com> writes:

> Sorry to bother, 
> but what is the maximum amount of RAM that a *single* (!) process can
> address under a Kernel version 2.6.13-15.7-smp, with 
>
> CONFIG_HIGHMEM64G=y
> CONFIG_HIGHMEM=y
> CONFIG_X86_PAE=y
>
> It seems that I can not get over 3 Gig border, but i need to, to solve
> my numerical problems :(.

I've heard of a kernel patch that gives you 3.5GB (leaving 0.5 for
the kernel) but you're not going to get any more than that without
buying a 64-bit machine or playing overlay tricks with mmap().  Given
the price and performance of 64-bit hardware, the former option is
probably a lot better.

-Doug
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/