linux-kernel - Re: [patch 3/7] x86, cpa: make the kernel physical mapping initialization a two pass sequence

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Date:	Wed, 8 Oct 2008 23:08:54 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Suresh Siddha <suresh.b.siddha@...el.com>,
	"hpa@...or.com" <hpa@...or.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"arjan@...ux.intel.com" <arjan@...ux.intel.com>,
	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	yinghai@...nel.org
Subject: Re: [patch 3/7] x86, cpa: make the kernel physical mapping
	initialization a two pass sequence


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

> Suresh Siddha wrote:
>> On Tue, Oct 07, 2008 at 08:28:08AM -0700, Jeremy Fitzhardinge wrote:
>>   
>>> Well, that's OK.  We just need to preserve the original page permissions
>>> when fragmenting the large mappings.  (This isn't a case that affects
>>> Xen, because it will already be 4k mappings.)
>>>     
>>
>> Jeremy, Can you please check if the appended patch fixes your issue and Ack
>> it? Test booted on three different 64bit platforms with and without
>> DEBUG_PAGEALLOC.
>>   
>
> This patch works fine under Xen.  Thanks for the quick fix.
>
> Tested-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>

applied to tip/x86/pat, thanks guys!

If it fails testing for some reason then it might not make the first 
v2.6.28 pull request, but it's definitely moving in the right direction 
so the PAT/TLB changes seem v2.6.28 worthy.

	Ingo
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