Bug 11278 – Memory above 64MB not recognised

Bug 11278 - Memory above 64MB not recognised

Summary:	Memory above 64MB not recognised

Status:	CLOSED WONTFIX

Aliases:	None

Product:	Red Hat Linux
Classification:	Retired
Component:	kernel (Show other bugs)
Sub Component:
Version:	6.2
Hardware:	i386 Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Michael K. Johnson
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Reported:	2000-05-07 08:33 EDT by Simon Oldfield
Modified:	2008-05-01 11:37 EDT (History)
CC List:	0 users

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Doc Type:	Bug Fix
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Last Closed:	2000-05-09 23:44:06 EDT
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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
machine.

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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