From mboxrd@z Thu Jan  1 00:00:00 1970
From: "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: Re: [PATCH] Two patches fixing regression introduced
	by 'x86-64, mm: Put early page table high'
Date: Mon, 02 May 2011 11:33:16 -0700
Message-ID: <4DBEF8EC.7080301@zytor.com>
References: <1304356942-17656-1-git-send-email-konrad.wilk@oracle.com>
	<4DBEEA69.7010000@zytor.com> <20110502180802.GA7498@dumpdata.com>
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To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: xen-devel@lists.xensource.com, yinghai@kernel.org, linux-kernel@vger.kernel.org, stefano.stabellini@eu.citrix.com
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On 05/02/2011 11:08 AM, Konrad Rzeszutek Wilk wrote:
>>
>> My inclination would be to apply your workaround -- are there any
>> adverse effects to doing that?
> 
> There is a bootup slowdown (not noticeable). That is because we call the
> 'memblock_find_range' function on every PTE table creation (only during
> bootup of course). 
> 
> Testing wise, on the machines on which the regression occurred, with these two
> patches the regression disappears - so that is a good sign. I am testing
> it on some more today to assure myself I am not missing anything.
> 

OK, sounds like a plan then.  I like it because it doesn't affect the
native kernel.

	-hpa