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Message-ID: <5252F728.4010401@redhat.com>
Date: Mon, 07 Oct 2013 14:02:16 -0400
From: Rik van Riel <riel@redhat.com>
MIME-Version: 1.0
Subject: Re: [PATCH 18/63] sched: numa: Slow scan rate if no NUMA hinting
 faults are being recorded
References: <1381141781-10992-1-git-send-email-mgorman@suse.de> <1381141781-10992-19-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:
> NUMA PTE scanning slows if a NUMA hinting fault was trapped and no page
> was migrated. For long-lived but idle processes there may be no faults
> but the scan rate will be high and just waste CPU. This patch will slow
> the scan rate for processes that are not trapping faults.
> 
> Signed-off-by: Mel Gorman <mgorman@suse.de>

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

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