linux-kernel - Re: 2.6.25-rc6: BUG: unable to handle kernel NULL pointer dereference

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Message-ID: <alpine.DEB.1.10.0803280947410.19746@sheep.housecafe.de>
Date:	Fri, 28 Mar 2008 09:50:45 +0100 (CET)
From:	Christian Kujau <lists@...dbynature.de>
To:	Björn Steinbrink <B.Steinbrink@....de>
cc:	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Markus Rehbach <markus.rehbach@....de>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Ingo Molnar <mingo@...e.hu>
Subject: Re: 2.6.25-rc6: BUG: unable to handle kernel NULL pointer
 dereference

On Fri, 28 Mar 2008, Björn Steinbrink wrote:
>> Subject: x86: fix prefetch workaround
>> From: Ingo Molnar <mingo@...e.hu>
>> Date: Thu Mar 27 15:58:28 CET 2008
>>
>> some early Athlon XP's and Opterons generate bogus faults on prefetch
>                    ^^
>
> Umh, XP? Didn't you say X2 above? And looking at the patch, X2 seems
> more plausible as well, I don't think that the XP supported the NX bit,
> did it?

Hm, would be a shame because I have an XP 2600+. /proc/cpuinfo tells me:

flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr mca cmov pat pse36 
mmx fxsr sse syscall mmxext 3dnowext 3dnow ts

...no NX in there. I wonder why this (already applied) patch should do 
anything on my box at all.

Thanks,
C.
-- 
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