2 GB RAM with high memory support

Aquiles · Posted: Sat Apr 19, 2008 2:17 pm Post subject: 2 GB RAM with high memory support

Hi everybody,

I've got Gentoo on an Intel Core2 Quad with 4 GB RAM. I'm using -march=i686 in my make.conf since I didn't want to run into any problems with no-64 bit apps. In my kernel configuration I see two options for the "high memory support": either "off" or "4 GB". I've got it in "4 GB".

But Gentoo is seeing only 2 GB (although BIOS says there are 4, so no hardware problem here). Top says:

Mem: 2059192k total

Anybody knows how could I see all 4 GB?

And by the way: should I change my mind and want a 64bit system, how could I ahcieve that? Perhaps changing the -march flag in make.conf and recompiling the whole system? Could I expect any issues if I was to do that?

Thank you.
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Aquiles

Desintegr · Posted: Sat Apr 19, 2008 2:19 pm Post subject:

Try the HIGHMEM64G option or better use a 64 bits system.
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Gentoo ~AMD64
Hoc Volo, Sic Jubeo !
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danomac · Posted: Sat Apr 19, 2008 2:39 pm Post subject:

Also make sure you enable memory remapping in your BIOS if there is an option for it.

Dairinin · n00b Joined: 03 Feb 2008 Posts: 64 Location: MSK, RF

And please read this to understand what you get an what you loose

Aquiles · Posted: Sun Apr 20, 2008 3:26 pm Post subject:

Well, after reading your posts and the link that Dairinin provided, it seems to me that the best option will be for me to switch to a 64 bit system. Any documents out there with instructions on how to do a full switch without screwing up my system?
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Aquiles