Missing 1GB RAM, where is it?

Mulyadi Santosa mulyadi.santosa at gmail.com
Wed Apr 13 22:42:10 EDT 2011


On Thu, Apr 14, 2011 at 00:20, Andrzej Kardas <andrzej-kardas at o2.pl> wrote:
> Hi,
> I'm little confused about amount of RAM memory in my computer and I can't
> figure out where disappear about 1GB memory. I need yours help to explain
> this, because i can't sleep :). Here is background:
> I've plugged into my computer 2x2GB RAM. In BIOS screen i see:
> Amount of available RAM: 4096MB
> so BIOS recognizes all 4GB, but my OS(32bit)
> uname -a
> Linux lpt #1 SMP Thu Mar 18 23:32:41 CET 2010 i686 GNU/Linux
> sees only 3014MB
> free -m
>              total       used       free     shared    buffers     cached
> Mem:          3014       1756       1258          0        456        918

OK, easiest things first, could you show us:
1. the output of  "grep -i highmem " toward your running kernel config file?

2. the complete entry grub/lilo stanza that is responsible to execute
your current running kernel

I need to see whether you're really enabling highmem support and
whether you use kinda kdump etc that might reserve some space in


Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com

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