From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [ANNOUNCE] 3.0-rt3
Date: Wed, 27 Jul 2011 23:49:58 +0200 (CEST)
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On Wed, 27 Jul 2011, Sebastian Ohl wrote:

> Hey folks,
> 
> i just tried to compile the new rt patch and i was wondering why i
> cannot select 4GB or 64GB of memory if i am selecting full preemption?
> in my old rt kernel (2.6.33.1) this hasn't been a problem.

As I sadi elsewhere I dropped highmem support for now as the 33-rt
hackery to make it work is just ugly as hell and anything above 4G is
even in mainline a complete disaster.

If possible, just run a 64bit kernel on your machine (you can still
use 32bit userspace) or you have to wait until someone comes up with a
reasonable fix for that problem, unless you are the one tackling it :)

Thanks,

	tglx