Re: Use a HIGHMEM enabled kernel

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#28

From: D. Stussy
Date: Wed, 11 Dec 2002 23:10

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EXACTLY 1Gb or below doesn't really need HIGHMEM.

include/asm-i386/page.h:  Change "128" to "16" on line 87 for __VMMALLOC_RESERVE
seems to do the trick on maximizing usable ram.

You'll still lose the top 16Mb.  I found that the system will lock up if one
goes below that number.  For those systems with video on the motherboard, the
top 8Mb is lost anyway (in the minimum video configuration), and giving the
video the top 16Mb still works.

A friend of mine and I have done this on multiple machines and there have been
no system crashes for several months.  We can't testify to longer periods
because we rebooted them to install updated kernels.

On Wed, 11 Dec 2002, Gary Menna wrote:
>    I am running Redhat 7.3 on a Compaq with 1 GB RAM    2.4.18-10smp
>I get the following message :
>Use a HIGHMEM enabled kernel.
>896MB LOWMEM available
>
>I thought highmem enabled kernel was only required for =>4GB  RAM
>Can anyone enlighten me on this .
>
>Thanking You ,

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From: "D. Stussy" <kd6lvw@bde-arc.ampr.org>
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Subject: Re: Use a HIGHMEM enabled kernel
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