Split the free lists for movable and unmovable allocations
This patch adds the core of the fragmentation reduction strategy. It works by grouping pages together based on their ability to migrate or be reclaimed. Basically, it works by breaking the list in zone->free_area list into MIGRATE_TYPES number of lists. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds

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@@ -31,6 +31,7 @@
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/* Bit indices that affect a whole block of pages */
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enum pageblock_bits {
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PB_range(PB_migrate, 1), /* 1 bit required for migrate types */
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NR_PAGEBLOCK_BITS
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};
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