Re: [PATCH] trim memory not covered by WB MTRRs

From: Justin Piszcz
Date: Thu Jun 14 2007 - 16:26:18 EST

On Thu, 14 Jun 2007, Pim Zandbergen wrote:

Thanks for this patch. I was having the exact same symptoms as Justin Piszcz, on a different, but similar motherboard:

Motherboard: GigaByte GA-G33-DS3R
BIOS rev: F2
Chipset: Intel G33
Memory: 8GB
Distro: Fedora 7 x86_64
Kernel: kernel-2.6.21-1.3194.fc7

Building vanilla 2.6.22-rc4 with your patch solved the problem.

I'm now seeing this in the syslog

**** WARNING: likely BIOS bug
**** MTRRs don't cover all of memory, trimmed 196608 pages

leaving me 7416672 kB of usable memory.

If there's any way I can help with more info or testing,
then let me know.


That's strange, I guess different chipsets 'chew' up different amounts of memory OR you have your DVT(?) (video-card memory/aperature) set to 256MB? I have mine set to 128MB, in top:

Mem: 8039576k total, 6187304k used, 1852272k free, 696k buffers

What type of memory are you using and what is your DVT set to?

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