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SubjectRe: [PATCH v3 -mm 3/3] mm: only defer compaction for failed order and higher
On Thu, Jan 26, 2012 at 03:01:02PM -0500, Rik van Riel wrote:
> Currently a failed order-9 (transparent hugepage) compaction can
> lead to memory compaction being temporarily disabled for a memory
> zone. Even if we only need compaction for an order 2 allocation,
> eg. for jumbo frames networking.
> The fix is relatively straightforward: keep track of the highest
> order at which compaction is succeeding, and only defer compaction
> for orders at which compaction is failing.
> Signed-off-by: Rik van Riel <>

Acked-by: Mel Gorman <>

Mel Gorman

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