Re: [PATCH 06/12] Export unusable free space index via /proc/pagetypeinfo

From: Rik van Riel
Date: Fri Feb 19 2010 - 16:47:12 EST


On 02/18/2010 01:02 PM, Mel Gorman wrote:
Unusuable free space index is a measure of external fragmentation that
takes the allocation size into account. For the most part, the huge page
size will be the size of interest but not necessarily so it is exported
on a per-order and per-zone basis via /proc/unusable_index.

The index is a value between 0 and 1. It can be expressed as a
percentage by multiplying by 100 as documented in
Documentation/filesystems/proc.txt.

Signed-off-by: Mel Gorman<mel@xxxxxxxxx>

Acked-by: Rik van Riel <riel@xxxxxxxxxx>

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