> I'm really unsure of what I'll say, but I've seen people on this list
> talking about CONFIG_DISCONTIGMEM, an option for the kernel, which is :
> "Say Y to upport efficient handling of discontiguous physical memory,
> for architectures which are either NUMA (Non-Uniform Memory Access)
> or have huge holes in the physical address space for other reasons.
> See <file:Documentation/vm/numa> for more."
I've tried using DISCONTIGMEM on the MIPS32 build, but it yields the
following build error. Maybe someone familiar w/ the SGI IP27 (Origin 200
2000) code could tell us whether simply turning on DISCONTIGMEM is
a good idea.
include/linux/mmzone.h:364:2: #error NODES_SHIFT > MAX_NODES_SHIFT
Also, even if it compiled with DISCONTIGMEM, a look at
shows no sign of HIGHMEM support, what I was depending on to use the upper
256MB of memory as per my original email. Now this may be OK; depending on
flexible the DISCONTIGMEM option is, perhaps I could map a wired TLB or
to the 2nd 256MB.
----- Original Message -----
From: "Thomas Petazzoni" <email@example.com>
To: "Matthew Starzewski" <firstname.lastname@example.org>
Cc: <email@example.com>; <Steve.Finney@SpirentCom.COM>
Sent: Friday, December 10, 2004 2:46 AM
Subject: Re: Using more than 256 MB of memory on SB1250 in 32-bit mode,