linux-kernel - Re: HIGHMEM64G Kernel (2.6.23.1) makes system crawl

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Message-ID: <471F7F28.2010805@zytor.com>
Date:	Wed, 24 Oct 2007 10:21:44 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Boaz Harrosh <bharrosh@...asas.com>
CC:	Rajkumar S <rajkumars@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: HIGHMEM64G Kernel (2.6.23.1) makes system crawl

Boaz Harrosh wrote:
> 
> From looking in source code the CONFIG_HIGHMEM64G is broken in many respects,
> in my opinion. It's really a 64-bit with 32-bit quirks enabled. Does it even
> run on None 64-bit machines? Not many! 
> 

Total and utter bullsh*t.  It runs on virtually all modern x86's since 
the P6/K7 (certain Pentium M chips being an exception).

Also, it is required for NX protection and for several of the paravirt 
environments to work.

	-hpa
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