From: kernel-stuff@comcast.net (Parag Warudkar)
To: Vivek Kutal <vivek.kutal@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: ZONE_HIGHMEM query
Date: Mon, 10 Oct 2005 17:00:57 +0000
Message-Id: <101020051700.15287.434A9E49000633AF00003BB7220922462700009A9B9CD3040A029D0A05@comcast.net>
Sender: linux-kernel-owner@vger.kernel.org
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KernelTrap has an good article explaining the details of HIGHMEM - http://kerneltrap.org/node/2450

Parag


> Hello Everyone ,
> All books that I have read say that the concept of ZONE_HIGHMEM is
> introduced because some architectures cannot directly map memory
> beyond 896MB (x86).
> 
> My question is What is direct mapping(does it mean, same virtual
> address and physical address) and why cant a architecture directly map
> a particular region in the memory?
> 
> 
> 
> --
> Thanks and Regards
> Vivek Kutal
> http://vivekkutal.blogspot.com
> 
>            "Live as if you were to die tomorrow. Learn as if you were
> to live forever."
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