Messages in this thread | | | Date | Thu, 7 Sep 2006 17:58:48 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH 0/8] Avoiding fragmentation with subzone groupings v25 |
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On Thu, 7 Sep 2006 20:03:42 +0100 (IST) Mel Gorman <mel@csn.ul.ie> wrote:
> When a page is allocated, the page-flags > are updated with a value indicating it's type of reclaimability so that it > is placed on the correct list on free.
We're getting awful tight on page-flags.
Would it be possible to avoid adding the flag? Say, have a per-zone bitmap of size (zone->present_pages/(1<<MAX_ORDER)) bits, then do a lookup in there to work out whether a particular page is within a MAX_ORDER clump of easy-reclaimable pages? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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