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Commit c124f5b5 authored by Christoph Lameter's avatar Christoph Lameter Committed by Pekka Enberg
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slub: pack objects denser 



Since we now have more orders available use a denser packing.
Increase slab order if more than 1/16th of a slab would be wasted.

Signed-off-by: default avatarChristoph Lameter <clameter@sgi.com>
Signed-off-by: default avatarPekka Enberg <penberg@cs.helsinki.fi>
parent 9b2cd506

mm/slub.c

+2 −2
Original line number Diff line number Diff line
@@ -1818,7 +1818,7 @@ static int slub_nomerge; 
 * system components. Generally order 0 allocations should be preferred since

 * order 0 does not cause fragmentation in the page allocator. Larger objects

 * be problematic to put into order 0 slabs because there may be too much

 * unused space left. We go to a higher order if more than 1/8th of the slab

 * unused space left. We go to a higher order if more than 1/16th of the slab

 * would be wasted.

 *

 * In order to reach satisfactory performance we must ensure that a minimum
@@ -1883,7 +1883,7 @@ static inline int calculate_order(int size) 
	if (!min_objects)

		min_objects = 4 * (fls(nr_cpu_ids) + 1);

	while (min_objects > 1) {

		fraction = 8;

		fraction = 16;

		while (fraction >= 4) {

			order = slab_order(size, min_objects,

						slub_max_order, fraction);