Messages in this thread | | | Date | Tue, 16 Feb 2010 20:44:26 -0500 | From | Rik van Riel <> | Subject | Re: [PATCH 04/12] Export fragmentation index via /proc/pagetypeinfo |
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On 02/12/2010 07:00 AM, Mel Gorman wrote: > Fragmentation index is a value that makes sense when an allocation of a > given size would fail. The index indicates whether an allocation failure is > due to a lack of memory (values towards 0) or due to external fragmentation > (value towards 1). 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/pagetypeinfo. > > The index is normally calculated as a value between 0 and 1 which is > obviously unsuitable within the kernel. Instead, the first three decimal > places are used as a value between 0 and 1000 for an integer approximation. > > Signed-off-by: Mel Gorman<mel@csn.ul.ie>
Acked-by: Rik van Riel <riel@redhat.com>
-- All rights reversed.
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