linux-kernel - Re: 2.6.26, PAT and AMD family 6

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Message-ID: <alpine.LFD.1.10.0805071716060.3024@woody.linux-foundation.org>
Date:	Wed, 7 May 2008 17:19:10 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Rene Herman <rene.herman@...access.nl>
cc:	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Adrian Bunk <bunk@...nel.org>,
	Yinghai Lu <yhlu.kernel@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	akpm@...ux-foundation.org, Pavel Machek <pavel@...e.cz>
Subject: Re: 2.6.26, PAT and AMD family 6

On Thu, 8 May 2008, Rene Herman wrote:
> 
> And again, the kernel DOES see that my CPU features PAT, it just refuses
> to use it.

Umm, and this is different how from clearing the PSE bit when we decide 
not to use large-page support? 

See arch/x86/kernel/setup_32.c: parse_mem() for an example.

Rene - you have valid points (ie that patches were NAK'ed etc and you 
might have wanted better changelog entries), but trust me, this one is not 
one of them. /proc/cpuinfo and the kernel clearing feature bits is 
_normal_. It's how it has always been.

			Linus
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