From: "H. Peter Anvin" <hpa@zytor.com>
To: linux-kernel@vger.kernel.org
Subject: Re: How to use >3G memory per process
Date: 18 Dec 2001 11:07:27 -0800 [thread overview]
Message-ID: <9vo45f$idr$1@cesium.transmeta.com> (raw)
In-Reply-To: <OHEPLPGMMIEGHANJIEBAIEPKCEAA.wydeng@platodesign.com> <200112181837.fBIIbUF02685@adsl-209-76-109-63.dsl.snfc21.pacbell.net>
Followup to: <200112181837.fBIIbUF02685@adsl-209-76-109-63.dsl.snfc21.pacbell.net>
By author: Wayne Whitney <whitney@math.berkeley.edu>
In newsgroup: linux.dev.kernel
>
> In mailing-lists.linux-kernel, you wrote:
>
> > [1] What need to be done for the kernel to support 3.5G or more user
> > address space per process?
>
> On ia32, change the value of __PAGE_OFFSET (where kernel space starts)
> in include/asm-i386/page.h. The size of kernel space must be a power
> of 2, so you can change __PAGE_OFFSET from its default of 0xC0000000
> to either 0xE0000000 (reasonable) or 0xF0000000 (overboard ?).
> You must also change the unlabeled value near the top of
> arch/i386/vmlinux.lds to match the value of __PAGE_OFFSET.
>
Note that this does break the (old) initrd protocol. Compile your
kernel monolithic.
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt <amsp@zytor.com>
next prev parent reply other threads:[~2001-12-18 19:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-18 17:48 How to use >3G memory per process Wenyong Deng
2001-12-18 18:37 ` Wayne Whitney
2001-12-18 19:07 ` H. Peter Anvin [this message]
2001-12-18 18:40 ` H. Peter Anvin
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