You'll have to recompile your kernel one way or another... Linux 2.4.x
supports memory that high natively, I think... but 2.2.x will have to be
patched... no clue where to get a patch from though.
Simply specifying mem=4096M will do nothing if the kernel doesn't support
it. Once the kernel is patched to work with all your memory, it should
automatically detect it all.
On Fri, 8 Dec 2000, John Indra wrote:
> Hello everyone...
>
> I manage a server with this spec:
> 4 (Quad) Pentium III Xeon 700 MHz
> 4 GB PC100 RAM
>
> After I installed Red Hat 7.0, the system only recognized 896 MB of the
> installed RAM (dmesg snippets following):
>
> -- dmesg snippet --
>
> Linux version 2.2.16-22smp ([EMAIL PROTECTED]) (gcc version
> egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)) #1 SMP Tue Aug 22 16:39:21
> EDT 2000
> Warning only 896MB will be used.
> Intel MultiProcessor Specification v1.4
> Virtual Wire compatibility mode.
> OEM ID: INTEL Product ID: SKA40 APIC at: 0xFEE00000
> Processor #3 Pentium(tm) Pro APIC version 17
> Processor #0 Pentium(tm) Pro APIC version 17
> Processor #1 Pentium(tm) Pro APIC version 17
> Processor #2 Pentium(tm) Pro APIC version 17
> I/O APIC #4 Version 17 at 0xFEC00000.
> I/O APIC #5 Version 17 at 0xFEC01000.
> Processors: 4
> mapped APIC to ffffe000 (fee00000)
> mapped IOAPIC to ffffd000 (fec00000)
> mapped IOAPIC to ffffc000 (fec01000)
> Detected 697732 kHz processor.
>
> -- end of dmesg snippet --
>
> If I recall correctly, the default Linux 2.2.x kernel can only support 2 GB
> of RAM (it's been a while since I follow the last Linux news). When I
> searched the web, I hit several links indicating that there are patches to
> make 2.2.x kernel support up to 4 GB RAM approximately.
>
> My question is, how do I configure my system so it can see all 4 GB RAM?
> Do I need to compile patched kernel from source? If so, where is the
> official patch and how to correctly install the kernel onto Red Hat 7.0?
> Or I have to do nothing and just by specifying mem=4096MB in /etc/lilo.conf
> will just do the trick?
>
> Thanks a lot for the help.
>
> Regards,
> John
>
>
>
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> Redhat-list mailing list
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>
--
-Statux
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