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Re: [PATCH 2/3] mm: page allocator: Calculate a better estimate of NR_FREE_PAGES when memory is low and kswapd is awake

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From: Christoph Lameter
Subject: Re: [PATCH 2/3] mm: page allocator: Calculate a better estimate of NR_FREE_PAGES when memory is low and kswapd is awake
Date: Monday, August 23, 2010 - 5:56 am

On Mon, 23 Aug 2010, Mel Gorman wrote:


The delta of the counters could also be reduced to increase accuracy.
See refresh_zone_stat_thresholds().

Also would it be possible to add the summation function to vmstat? It may
be useful elsewhere.

A new function like

	zone_page_state_snapshot()

or so?


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[PATCH 0/3] Reduce watermark-related problems with the per ..., Mel Gorman, (Mon Aug 23, 1:00 am)
[PATCH 1/3] mm: page allocator: Update free page counters ..., Mel Gorman, (Mon Aug 23, 1:00 am)
[PATCH 2/3] mm: page allocator: Calculate a better estimat ..., Mel Gorman, (Mon Aug 23, 1:00 am)
[PATCH 3/3] mm: page allocator: Drain per-cpu lists after ..., Mel Gorman, (Mon Aug 23, 1:00 am)
Re: [PATCH 0/3] Reduce watermark-related problems with the ..., Christoph Lameter, (Mon Aug 23, 5:45 am)
Re: [PATCH 1/3] mm: page allocator: Update free page count ..., Christoph Lameter, (Mon Aug 23, 5:47 am)
Re: [PATCH 2/3] mm: page allocator: Calculate a better est ..., Christoph Lameter, (Mon Aug 23, 5:56 am)
Re: [PATCH 0/3] Reduce watermark-related problems with the ..., Mel Gorman, (Mon Aug 23, 6:01 am)
Re: [PATCH 2/3] mm: page allocator: Calculate a better est ..., Mel Gorman, (Mon Aug 23, 6:03 am)
Re: [PATCH 0/3] Reduce watermark-related problems with the ..., Christoph Lameter, (Mon Aug 23, 6:38 am)
Re: [PATCH 0/3] Reduce watermark-related problems with the ..., Mel Gorman, (Mon Aug 23, 6:39 am)
Re: [PATCH 2/3] mm: page allocator: Calculate a better est ..., Christoph Lameter, (Mon Aug 23, 6:41 am)
Re: [PATCH 2/3] mm: page allocator: Calculate a better est ..., Mel Gorman, (Mon Aug 23, 6:55 am)
Re: [PATCH 2/3] mm: page allocator: Calculate a better est ..., Christoph Lameter, (Mon Aug 23, 9:04 am)
Re: [PATCH 2/3] mm: page allocator: Calculate a better est ..., Mel Gorman, (Mon Aug 23, 9:13 am)
Re: [PATCH 3/3] mm: page allocator: Drain per-cpu lists af ..., KOSAKI Motohiro, (Mon Aug 23, 4:17 pm)