linux-kernel - Re: [PATCH 09/18] sched: Add infrastructure for split shared/private accounting of NUMA hinting faults

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Message-ID: <20130731090829.GJ2296@suse.de>
Date:	Wed, 31 Jul 2013 10:08:29 +0100
From:	Mel Gorman <mgorman@...e.de>
To:	Hillf Danton <dhillf@...il.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...nel.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 09/18] sched: Add infrastructure for split shared/private
 accounting of NUMA hinting faults

On Wed, Jul 17, 2013 at 10:17:29AM +0800, Hillf Danton wrote:
> On Mon, Jul 15, 2013 at 11:20 PM, Mel Gorman <mgorman@...e.de> wrote:
> >  /*
> >   * Got a PROT_NONE fault for a page on @node.
> >   */
> > -void task_numa_fault(int node, int pages, bool migrated)
> > +void task_numa_fault(int last_nid, int node, int pages, bool migrated)
> 
> For what is the new parameter?
> 

To weight the fault heavier if the page was migrated due to being
improperly placed at fault time.

-- 
Mel Gorman
SUSE Labs
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