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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: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
This commit is contained in:
Christoph Lameter 2008-04-14 19:13:29 +03:00 committed by Pekka Enberg
parent 9b2cd506e5
commit c124f5b54f
1 changed files with 2 additions and 2 deletions
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4
mm/slub.c
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@ -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);