32-bit system recognizes only 3GB of memory

Solution Verified - Updated -

Issue

  • After upgrading the kernel, it only shows 3.1GB of memory instead of 4GB installed on the system.
$ uname -a
Linux hostname 2.6.9-67.0.7.EL #1 Wed Feb 27 04:37:11 EST 2008 i686 i686 i386 GNU/Linux

Environment

  • Red Hat Enterprise Linux
  • 32-bit non-PAE kernel
  • 4+GB RAM

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