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HumanPixel
n00b
Joined: 24 May 2004
Posts: 44
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 Posted: Fri Aug 12, 2005 8:31 pm Post subject: System Monitor Memory Reporting |
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| Stupid Question: I have 1GB of RAM installed on my system. The Gnome System Monitor reports my system as having 820MB of RAM installed. I also noticed this figure in the Help > About of VMWare Workstation. Is there a reserved set of memory that I'm not aware of? |
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codergeek42
Bodhisattva
Joined: 05 Apr 2004
Posts: 5142
Location: Anaheim, CA (USA)
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| Posted: Fri Aug 12, 2005 9:01 pm Post subject: Re: System Monitor Memory Reporting |
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| HumanPixel wrote: | | Stupid Question: I have 1GB of RAM installed on my system. The Gnome System Monitor reports my system as having 820MB of RAM installed. I also noticed this figure in the Help > About of VMWare Workstation. Is there a reserved set of memory that I'm not aware of? |
Linux only uses the first ~870 megabytes or so of RAM. If you want to use 1 GB of your RAM you'll need to enable high memory support (up to 4G) in your kernel configuration under the processor type and features menu.
Edit: I forget that you can also use a patch by Con Kolivas to enable 1 GB of lowmem, but that's said to break some applications such as VMware. 
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~~ Peter: Programmer, Mathematician, STEM & Free Software Advocate, Enlightened Agent, Transhumanist, Fedora contributor
Who am I? :: EFF & FSF |
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HumanPixel
n00b
Joined: 24 May 2004
Posts: 44
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| Posted: Fri Aug 12, 2005 9:27 pm Post subject: |
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| Good to know... Does the Himem support in the kernel have any adverse effects on VMWare also? |
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codergeek42
Bodhisattva
Joined: 05 Apr 2004
Posts: 5142
Location: Anaheim, CA (USA)
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| Posted: Fri Aug 12, 2005 9:36 pm Post subject: |
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| HumanPixel wrote: | | Good to know... Does the Himem support in the kernel have any adverse effects on VMWare also? |
None that I'm aware of.
_________________
~~ Peter: Programmer, Mathematician, STEM & Free Software Advocate, Enlightened Agent, Transhumanist, Fedora contributor
Who am I? :: EFF & FSF |
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HumanPixel
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Joined: 24 May 2004
Posts: 44
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| Posted: Fri Aug 12, 2005 10:05 pm Post subject: |
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| It's odd. I've compiled in the 4GB support but my memory remains the same. Is there a config file somewhere capping it? |
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widan
Veteran
Joined: 07 Jun 2005
Posts: 1512
Location: Paris, France
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| Posted: Sat Aug 13, 2005 12:32 am Post subject: |
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| HumanPixel wrote: | | It's odd. I've compiled in the 4GB support but my memory remains the same. Is there a config file somewhere capping it? |
No. Look for that in your dmesg output:
| Code: | On node 0 totalpages: 196592
DMA zone: 4096 pages, LIFO batch:1
Normal zone: 192496 pages, LIFO batch:31
HighMem zone: 0 pages, LIFO batch:1 |
You should have some pages in the "HighMem zone". If you don't have any, recheck your kernel config (zcat /proc/config.gz, and look for CONFIG_HIMEM4G in there). |
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