From: Christian Parpart <trapni@gentoo.org>
To: linux-kernel@vger.kernel.org
Subject: Re: I'm having 4GB RAM, but Linux sees just 3GB???
Date: Mon, 16 May 2005 19:59:02 +0200 [thread overview]
Message-ID: <200505161959.04440.trapni@gentoo.org> (raw)
In-Reply-To: <4288DCE7.9070508@didntduck.org>
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(oops)
On Monday 16 May 2005 7:48 pm, Brian Gerst wrote:
> > BIOS-e820: 0000000000000000 - 0000000000094800 (usable)
> > BIOS-e820: 0000000000094800 - 00000000000a0000 (reserved)
> > BIOS-e820: 00000000000c2000 - 0000000000100000 (reserved)
> > BIOS-e820: 0000000000100000 - 00000000bff20000 (usable)
> > BIOS-e820: 00000000bff20000 - 00000000bff2e000 (ACPI data)
> > BIOS-e820: 00000000bff2e000 - 00000000bff80000 (ACPI NVS)
> > BIOS-e820: 00000000bff80000 - 00000000c0000000 (reserved)
> > BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
> > BIOS-e820: 00000000fec00000 - 00000000fec00400 (reserved)
> > BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
> > BIOS-e820: 00000000fff80000 - 0000000100000000 (reserved)
> >
> > hmm... what does this mean?
>
> It means that there is a hole at 00000000c0000000 - 0000000100000000
> (3GB-4GB) for PCI memory-mapped devices. The 4th GB of RAM should be
> remapped by the BIOS to 4GB-5GB, but isn't. Your BIOS is either buggy
> or misconfigured.
Aiiii, that's good news.
I found a "Memhole" area. But I never used to change these items.
Unfortunately, my TYAN board reference guide isn't telling me what to change
there for good - so - can you tell me where to find more information about
there?
If I remember correctly, it provided me the options ("Automatic"/"Manual") and
a value list with the following items:
64MB 128MB, 256MB, 512MB, 1024MB 2048MB, 3G, 3.5G.
and another list I can't remember by now.
but *playing* around with these values didn't help much (I just reduced my
memory in linux down to 2GB once but didn't find the right values for getting
4GB).
So, what should I do then?
Best reagrds,
Christian Parpart.
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next prev parent reply other threads:[~2005-05-16 18:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-16 14:04 I'm having 4GB RAM, but Linux sees just 3GB??? Christian Parpart
2005-05-16 14:44 ` Brian Gerst
2005-05-16 15:01 ` Christian Parpart
2005-05-16 17:48 ` Brian Gerst
2005-05-16 17:59 ` Christian Parpart [this message]
2005-05-17 6:34 ` Denis Vlasenko
2005-05-16 17:15 ` Peter Buckingham
2005-05-16 18:01 ` Christian Parpart
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