From mboxrd@z Thu Jan 1 00:00:00 1970 From: mulyadi.santosa@gmail.com (Mulyadi Santosa) Date: Thu, 14 Apr 2011 09:42:10 +0700 Subject: Missing 1GB RAM, where is it? In-Reply-To: <4DA5DB47.9080101@o2.pl> References: <4DA5DB47.9080101@o2.pl> Message-ID: To: kernelnewbies@lists.kernelnewbies.org List-Id: kernelnewbies.lists.kernelnewbies.org Hi... On Thu, Apr 14, 2011 at 00:20, Andrzej Kardas 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 2.6.33.1 #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 RAM.... -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com