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Bug 11278 - Memory above 64MB not recognised
Memory above 64MB not recognised
Product: Red Hat Linux
Classification: Retired
Component: kernel (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Michael K. Johnson
Depends On:
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Reported: 2000-05-07 08:33 EDT by Simon Oldfield
Modified: 2008-05-01 11:37 EDT (History)
0 users

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2000-05-09 23:44:06 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Simon Oldfield 2000-05-07 08:33:07 EDT
I have just installed redhat linux 6.2 onto a PC with 256MB of RAM on an
MS-6153VA ATX VIA Apollo Pro133 Mainboard.  Linux is reporting that there
is only 64MB of RAM.  The BIOS, win95 and win98 all report 256MB of RAM.
Comment 1 Simon Oldfield 2000-05-08 19:58:59 EDT
I got linux to recognise the correct amount of memory by sepcifying the
"mem=256MB" option to lilo.  Is this a BIOS problem or a linux problem?  Is it
simply that this is a new-ish motherboard, and it will all go away at some
point in the future or will I have to explicity set the memory forever more?
Comment 2 Doug Ledford 2000-05-09 23:44:59 EDT
This sounds like your bios doesn't support the extended memory detection call
that the 2.2.14 kernel we ship uses.  This shouldn't be a problem with the 2.4
kernel since it uses the 0e80 call to get the bios memory mapping.  Until then
you will need to keep passing the mem= parameter to the 2.2 kernels on your
Comment 3 Doug Ledford 2000-05-10 00:06:59 EDT
Duh....that should be the e820 call in the sentences above....technical accuracy
and all...

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