Memory Issue

Jegadeesh kovaiteam at gmail.com
Wed May 2 11:43:20 UTC 2007


Hi,

I have 4GB memory in my machine . The machine is four Intel(R) Xeon(R)
CPU - 1.60GHz  processors box. The bios correctly shows 4GB memory.
Initially the machine had Redhat Enterprise Linux 3 on it and the
machine showed all 4GB memory . Now I have reinstalled the OS to FC6 .
But now machine shows only 3 GB memory.

We have tried recompiling the linux kernel with following options but
still it didnt show all the available memory (4GB)
Method :1

    CONFIG_HIGHMEM4G=y
    CONFIG_HIGHMEM=y


Method : 2

   CONFIG_HIGHMEM64G=y
   CONFIG_HIGHMEM=y


We have also tried passing boot option mem=4096M  to the kernel
without any luck.

What it could be the reason? How to fix this issue?

Thanks in advance,
-Jegadeesh




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