linux-kernel - Re: [patch 2/7] x86 PAT: Add follow_pfnmp_pte routine to help tracking pfnmap pages

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Message-ID: <20081218221512.GB3331@linux-os.sc.intel.com>
Date:	Thu, 18 Dec 2008 14:15:13 -0800
From:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
To:	Nick Piggin <npiggin@...e.de>
Cc:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"hpa@...or.com" <hpa@...or.com>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"hugh@...itas.com" <hugh@...itas.com>,
	"arjan@...radead.org" <arjan@...radead.org>,
	"jbarnes@...tuousgeek.org" <jbarnes@...tuousgeek.org>,
	"rdreier@...co.com" <rdreier@...co.com>,
	"jeremy@...p.org" <jeremy@...p.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>
Subject: Re: [patch 2/7] x86 PAT: Add follow_pfnmp_pte routine to help tracking pfnmap pages - v3

On Thu, Dec 18, 2008 at 01:31:12PM -0800, Nick Piggin wrote:
> On Thu, Dec 18, 2008 at 11:41:28AM -0800, venkatesh.pallipadi@...el.com wrote:
> > Add a generic interface to follow pfn in a pfnmap vma range. This is used by
> > one of the subsequent x86 PAT related patch to keep track of memory types
> > for vma regions across vma copy and free.
> > 
> > Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>
> > Signed-off-by: Suresh Siddha <suresh.b.siddha@...el.com>
> 
> Can you please reuse follow_phys for this? (preferably use the same API
> even if it requires some modification, otherwise if not possible, then
> at least can you implement a common core for both APIs).
> 

Yes. Hadn't noticed the presence of follow_phys before. Will send a patch to
handle this.

Thanks,
Venki
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