linux-kernel - Re: question on NUMA page migration

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Date:	Sun, 21 Oct 2012 14:31:47 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Rik van Riel <riel@...hat.com>
Cc:	Ni zhan Chen <nizhan.chen@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Linux Memory Management List <linux-mm@...ck.org>,
	Mel Gorman <mel@....ul.ie>,
	Linux kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: question on NUMA page migration


* Rik van Riel <riel@...hat.com> wrote:

> On 10/20/2012 10:39 PM, Ni zhan Chen wrote:
> >On 10/19/2012 11:53 PM, Rik van Riel wrote:
> >>Hi Andrea, Peter,
> >>
> >>I have a question on page refcounting in your NUMA
> >>page migration code.
> >>
> >>In Peter's case, I wonder why you introduce a new
> >>MIGRATE_FAULT migration mode. If the normal page
> >>migration / compaction logic can do without taking
> >>an extra reference count, why does your code need it?
> >
> >Hi Rik van Riel,
> >
> >This is which part of codes? Why I can't find MIGRATE_FAULT in latest
> >v3.7-rc2?
> 
> It is in tip.git in the numa/core branch.

The Git access URI is:

  git pull  git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git numa/core
  git clone git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git numa/core

Thanks,

	Ingo

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