From mboxrd@z Thu Jan  1 00:00:00 1970
From: pritambankar1988@gmail.com (Pritam Bankar)
Date: Fri, 2 Nov 2012 16:16:35 +0530
Subject: No subject
Message-ID: <CAE6Wm-vX+=pc6BB6C5bZ+A8YOK9QQp1EAb29nq5MBM1_KMxD5g@mail.gmail.com>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

Hi,
I know very well that memory on 32-bit Linux system is normally split
in following way

First 3GB = user space (High memory)
Last 1GB = kernel space (Low memory)

But I have some questions,

1. How is memory split up on 64-bit architecture
2. Can we override this 3:1 split ?
3. If yes, who can do that user or kernel?

Thanks,
Pritam Bankar