linux-kernel - Re: [PATCH V3 5/8] x86: Introduce function to get pmd entry pointer

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Date:	Thu, 13 Nov 2014 07:54:57 +0100
From:	Juergen Gross <jgross@...e.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	linux-kernel@...r.kernel.org, xen-devel@...ts.xensource.com,
	david.vrabel@...rix.com, boris.ostrovsky@...cle.com,
	x86@...nel.org, tglx@...utronix.de, mingo@...hat.com, hpa@...or.com
Subject: Re: [PATCH V3 5/8] x86: Introduce function to get pmd entry pointer

On 11/12/2014 11:12 PM, Konrad Rzeszutek Wilk wrote:
> On Tue, Nov 11, 2014 at 06:43:43AM +0100, Juergen Gross wrote:
>> Introduces lookup_pmd_address() to get the address of the pmd entry
>> related to a virtual address in the current address space. This
>> function is needed for support of a virtual mapped sparse p2m list
>> in xen pv domains.
>>
> What is wrong with using 'lookup_address' ?

It doesn't return the needed information. I need a pmd entry here, not
a pte entry.


Juergen
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