The e820 speck says that the 0x0e0000-0x0effff region is board specific. I
believe that there really is available memory as reported on this machine.
I suspect, however, that Linux is not equipped to deal with available RAM in
the 0x0A0000-0x100000 region, and THAT is the problem.
Nathan
-----Original Message-----
From: orc@pell.portland.or.us [mailto:orc@pell.portland.or.us]
Sent: Thursday, January 06, 2000 6:27 PM
To: x-linux-kernel@vger.rutgers.edu
Subject: Re: Memory detection is still broken in 2.3.36
In article <linux.kernel.20000106173356.B1730@pcep-jamie.cern.ch>,
Jamie Lokier <lkd@tantalophile.demon.co.uk> wrote:
>Jan 6 05:03:56 thefinal kernel: e820: 0009fc00 @ 00000000 (usable)
>Jan 6 05:03:56 thefinal kernel: e820: 00000400 @ 0009fc00 (reserved)
>Jan 6 05:03:56 thefinal kernel: e820: 00004000 @ 000e8000 (usable)
>Jan 6 05:03:56 thefinal kernel: e820: 00010000 @ 000f0000 (reserved)
>Jan 6 05:03:56 thefinal kernel: e820: 03ee0000 @ 00100000 (usable)
>Jan 6 05:03:56 thefinal kernel: e820: 00010000 @ 03fe0000 (ACPI data)
>Jan 6 05:03:56 thefinal kernel: e820: 00010000 @ 03ff0000 (reserved)
>Jan 6 05:03:56 thefinal kernel: e820: 00016e00 @ 100a0000 (reserved)
>Jan 6 05:03:56 thefinal kernel: e820: 00000200 @ 100b6e00 (ACPI NVS)
>Jan 6 05:03:56 thefinal kernel: e820: 00049000 @ 100b7000 (reserved)
>Jan 6 05:03:56 thefinal kernel: e820: 00080000 @ fff80000 (reserved)
>
>The map looks plausible to me. How do I tell which page ranges the
>kernel is using for memory allocation?
The (usable) pages, like, oh...
>Jan 6 05:03:56 thefinal kernel: e820: 00004000 @ 000e8000 (usable)
... which is most likely the guilty party that's making your
system die.
Try the patch I've put on the lkml and see if that makes a difference
(this is the memory detection part of the monster memory patch than
Nathan Zook and I have been batting about for the past few weeks;
one of the things it does is ignore e820 regions that live in the
640k-1mb region, where several bioses cheerfully LIE and report
exists.)
____
david parsons \bi/ and you've got a bios that politely sorts all the
\/ e820 regions. How unfortunate that it
should slip one little whopper on in.
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