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

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Message-ID: <alpine.LFD.1.10.0805080214070.3318@apollo.tec.linutronix.de>
Date:	Thu, 8 May 2008 02:21:24 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Rene Herman <rene.herman@...access.nl>
cc:	"H. Peter Anvin" <hpa@...or.com>, Adrian Bunk <bunk@...nel.org>,
	Yinghai Lu <yhlu.kernel@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	torvalds@...ux-foundation.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:
> On 08-05-08 02:03, H. Peter Anvin wrote:
> > Rene Herman wrote:
> > > > 
> > > > Okay, that is utter nonsense.  /proc/cpuinfo has always been, and will
> > > > always be, the CPU *AS THE KERNEL SEES IT*.  If you want something else,
> > > > use x86info(1).
> > > 
> > > What a lovely way of syncing reality with your definitions. The kernel
> > > _does_ see that my CPU features PAT, it just refuses to use it because
> > > it doesn't trust it enough. Vital difference. Maybe not to the kernel,
> > > but definitely to me, the user. /proc/cpuinfo is a user interface.
> > > 
> > 
> > No, /proc/cpuinfo is informing the user about the kernel's view of the CPU.
> 
> And again, the kernel DOES see that my CPU features PAT, it just refuses
> to use it.

Yuck, because your CPU has the PAT feature the kernel has an obligation
to support it ?

Nice try.

	tglx
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