linux-kernel - Re: [PATCH v3 3/10] x86/asm: Fix pud/pmd interfaces to handle large PAT bit

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Message-ID: <1440512146.14237.15.camel@hp.com>
Date:	Tue, 25 Aug 2015 08:15:46 -0600
From:	Toshi Kani <toshi.kani@...com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	hpa@...or.com, mingo@...hat.com, akpm@...ux-foundation.org,
	bp@...en8.de, linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	x86@...nel.org, jgross@...e.com, konrad.wilk@...cle.com,
	elliott@...com
Subject: Re: [PATCH v3 3/10] x86/asm: Fix pud/pmd interfaces to handle large
 PAT bit

On Tue, 2015-08-25 at 10:16 +0200, Thomas Gleixner wrote:
> On Wed, 5 Aug 2015, Toshi Kani wrote:
> 
> > The PAT bit gets relocated to bit 12 when PUD and PMD mappings are
> > used.  This bit 12, however, is not covered by PTE_FLAGS_MASK, which
> > is corrently used for masking pfn and flags for all cases.
> > 
> > Fix pud/pmd interfaces to handle pfn and flags properly by using
> > P?D_PAGE_MASK when PUD/PMD mappings are used, i.e. PSE bit is set.
> 
> Can you please split that into a patch introducing and describing the
> new mask helper functions and a second one making use of it?

Will do.  I will send out v4 patchset today with this update (and the patch
01 update). 

Thanks,
-Toshi
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