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Date: Mon, 07 Oct 2013 10:02:59 -0400
From: Rik van Riel <riel@redhat.com>
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To: Mel Gorman <mgorman@suse.de>
CC: Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
        Ingo Molnar <mingo@kernel.org>, Andrea Arcangeli <aarcange@redhat.com>,
        Johannes Weiner <hannes@cmpxchg.org>, Linux-MM <linux-mm@kvack.org>,
        LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 09/63] mm: Account for a THP NUMA hinting update as one
 PTE update
References: <1381141781-10992-1-git-send-email-mgorman@suse.de> <1381141781-10992-10-git-send-email-mgorman@suse.de>
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On 10/07/2013 06:28 AM, Mel Gorman wrote:
> A THP PMD update is accounted for as 512 pages updated in vmstat.  This is
> large difference when estimating the cost of automatic NUMA balancing and
> can be misleading when comparing results that had collapsed versus split
> THP. This patch addresses the accounting issue.
> 
> Cc: stable <stable@vger.kernel.org>
> Signed-off-by: Mel Gorman <mgorman@suse.de>

Reviewed-by: Rik van Riel <riel@redhat.com>

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Date: Mon, 07 Oct 2013 10:02:59 -0400
From: Rik van Riel <riel@redhat.com>
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Subject: Re: [PATCH 09/63] mm: Account for a THP NUMA hinting update as one
 PTE update
References: <1381141781-10992-1-git-send-email-mgorman@suse.de> <1381141781-10992-10-git-send-email-mgorman@suse.de>
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To: Mel Gorman <mgorman@suse.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>, Srikar Dronamraju <srikar@linux.vnet.ibm.com>, Ingo Molnar <mingo@kernel.org>, Andrea Arcangeli <aarcange@redhat.com>, Johannes Weiner <hannes@cmpxchg.org>, Linux-MM <linux-mm@kvack.org>, LKML <linux-kernel@vger.kernel.org>

On 10/07/2013 06:28 AM, Mel Gorman wrote:
> A THP PMD update is accounted for as 512 pages updated in vmstat.  This is
> large difference when estimating the cost of automatic NUMA balancing and
> can be misleading when comparing results that had collapsed versus split
> THP. This patch addresses the accounting issue.
> 
> Cc: stable <stable@vger.kernel.org>
> Signed-off-by: Mel Gorman <mgorman@suse.de>

Reviewed-by: Rik van Riel <riel@redhat.com>

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