SLUB: Improve hackbench speed

Increase the mininum number of partial slabs to keep around and put
partial slabs to the end of the partial queue so that they can add
more objects.

Signed-off-by: Christoph Lameter <[email protected]>
Reviewed-by: Pekka Enberg <[email protected]>
Acked-by: Ingo Molnar <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/mm/slub.c b/mm/slub.c
index b9f37cb0f2e6a61d80eeca2b3c9dc3799e863bce..3655ad359f03b7a776b93fc3bc192d683400859b 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -172,7 +172,7 @@ static inline void ClearSlabDebug(struct page *page)
  * Mininum number of partial slabs. These will be left on the partial
  * lists even if they are empty. kmem_cache_shrink may reclaim them.
  */
-#define MIN_PARTIAL 2
+#define MIN_PARTIAL 5
 
 /*
  * Maximum number of desirable partial slabs.
@@ -1613,7 +1613,7 @@ checks_ok:
         * then add it.
         */
        if (unlikely(!prior))
-               add_partial(get_node(s, page_to_nid(page)), page);
+               add_partial_tail(get_node(s, page_to_nid(page)), page);
 
 out_unlock:
        slab_unlock(page);