linux-kernel - Re: [regression] commit 6a4f3b52 causes invalid memtype

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Date:	Mon, 05 Jul 2010 16:52:49 +0800
From:	Xiaotian Feng <dfeng@...hat.com>
To:	Ali Gholami Rudi <ali@...i.ir>
CC:	x86@...nel.org, Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Venkatesh Pallipadi <venki@...gle.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>
Subject: Re: [regression] commit 6a4f3b52 causes invalid memtype

On 07/05/2010 03:51 PM, Ali Gholami Rudi wrote:
> Hi,
>
> In -rc4 kernel these messages appear in my dmesg (complete dmesg
> at the end of this mail):
>
> 	[    0.400777] swapper:1 freeing invalid memtype e0000000-e0040000
> 	...
> 	[    0.453489] swapper:1 freeing invalid memtype e0000000-e0010000
> 	[    0.453585] swapper:1 freeing invalid memtype e0041000-e0045000
> 	[    0.453673] swapper:1 freeing invalid memtype e0045000-e0049000
> 	...
> 	[   12.662571] fbpad:980 conflicting memory types e0049000-e0549000 uncached-minus<->write-combining
> 	[   12.662579] reserve_memtype failed 0xe0049000-0xe0549000, track uncached-minus, req uncached-minus
> 	[   13.303389] fbpad:980 map pfn expected mapping type uncached-minus for e0049000-e0549000, got write-combining
>
> The last 3 lines appear when mmap()ing nouveau framebuffer.
>
> I reverted this commit and everything seems ok once more:
>
> 	commit 6a4f3b523779b67e7d560ed42652f8a59f2f9782
> 	Author: Venkatesh Pallipadi<venki@...gle.com>
> 	Date:   Thu Jun 10 17:45:01 2010 -0700
> 	
> 	    x86, pat: Proper init of memtype subtree_max_end
>
> Thanks,
> Ali

Could you please try following commit in -tip tree?

commit 2463eb8b3093995e09a0d41b3d78ee0cf5fb4249
Author: Peter Zijlstra <peterz@...radead.org>
Date:   Sat May 29 15:31:43 2010 +0200

     rbtree: Undo augmented trees performance damage

Thanks
Xiaotian
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