linux-kernel - Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwork for 64-bit Xen support

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Message-ID: <20080630180304.GA23739@elte.hu>
Date:	Mon, 30 Jun 2008 20:03:04 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Nick Piggin <npiggin@...e.de>, Mark McLoughlin <markmc@...hat.com>,
	xen-devel <xen-devel@...ts.xensource.com>,
	Eduardo Habkost <ehabkost@...hat.com>,
	Vegard Nossum <vegard.nossum@...il.com>,
	Stephen Tweedie <sct@...hat.com>, x86@...nel.org,
	LKML <linux-kernel@...r.kernel.org>,
	Yinghai Lu <yhlu.kernel@...il.com>
Subject: Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwork for
	64-bit Xen support


* Jeremy Fitzhardinge <jeremy@...p.org> wrote:

>> -tip auto-testing found pagetable corruption (CPA self-test failure):
>>
>> [   32.956015] CPA self-test:
>> [   32.958822]  4k 2048 large 508 gb 0 x 2556[ffff880000000000-ffff88003fe00000] miss 0
>> [   32.964000] CPA ffff88001d54e000: bad pte 1d4000e3
>> [   32.968000] CPA ffff88001d54e000: unexpected level 2
>> [   32.972000] CPA ffff880022c5d000: bad pte 22c000e3
>> [   32.976000] CPA ffff880022c5d000: unexpected level 2
>> [   32.980000] CPA ffff8800200ce000: bad pte 200000e3
>> [   32.984000] CPA ffff8800200ce000: unexpected level 2
>> [   32.988000] CPA ffff8800210f0000: bad pte 210000e3
>>
>> config and full log can be found at:
>>
>>  http://redhat.com/~mingo/misc/config-Mon_Jun_30_11_11_51_CEST_2008.bad
>>   
>
> This config doesn't have CONFIG_DEBUG_KERNEL enabled, let alone 
> CONFIG_CPA_DEBUG.  I've noticed this seems to happen quite a lot: 
> there's a disconnect between the log file and the config which is 
> supposed to have built the kernel.  Is there a bug in your test 
> infrastructure?

sometimes the kernel preceding the currently built one is the buggy one. 
As i have them saved away, so the right one should be:

 http://redhat.com/~mingo/misc/config-Mon_Jun_30_11_03_04_CEST_2008.bad

	Ingo
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