Subject: Re: BIG memory problem
To: Nicolas Sadirac <Nicolas.Sadirac@epita.fr>
From: Andrew Brown <firstname.lastname@example.org>
Date: 01/23/1997 12:30:40
>> From: Nicolas Sadirac
> May some one help us.
> We have a PENTIUM-PRO 200 with 512Mo of ram but NetBSD
> find only 64Mo.
> - BIOS and NT find the 512Mo.
> - we try change EXTMEM_SIZE in config file but then it panic.
set EXTMEM_SIZE to 523264 (511 * 1024, not 512 * 1024) and unless you
have the -current source that attempts to guess at a good value for
NKPDE, you will need to also set NKPDE to something other than 12 in
sys/arch/i386/include/pmap.h. probably 24 in this case? test various
values (i bounced around a bit and settled on 16 for 128M) until you
find a stable one. i *STILL* do not understand exactly how this is set
so i can't give you a good value off the top of my head.
but remember...always keep a good kernel around so if the new one doesn't
work, you can still boot and build a better kernel.
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