[slubllv3 04/21] slub: Move node determination out of hotpath

[Christoph Lameter]

If the node does not change then there is no need to recalculate
the node from the page struct. So move the node determination
into the places where we acquire a new slab page.

Signed-off-by: Christoph Lameter <cl@xxxxxxxxx>

---
 mm/slub.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

Index: linux-2.6/mm/slub.c
===================================================================
--- linux-2.6.orig/mm/slub.c	2011-04-15 12:52:17.000000000 -0500
+++ linux-2.6/mm/slub.c	2011-04-15 12:54:15.000000000 -0500
@@ -1828,7 +1828,6 @@ load_freelist:
 	c->freelist = get_freepointer(s, object);
 	page->inuse = page->objects;
 	page->freelist = NULL;
-	c->node = page_to_nid(page);
 
 unlock_out:
 	slab_unlock(page);
@@ -1845,8 +1844,10 @@ another_slab:
 new_slab:
 	page = get_partial(s, gfpflags, node);
 	if (page) {
-		c->page = page;
 		stat(s, ALLOC_FROM_PARTIAL);
+load_from_page:
+		c->node = page_to_nid(page);
+		c->page = page;
 		goto load_freelist;
 	}
 
@@ -1867,8 +1868,8 @@ new_slab:
 
 		slab_lock(page);
 		__SetPageSlubFrozen(page);
-		c->page = page;
-		goto load_freelist;
+
+		goto load_from_page;
 	}
 	if (!(gfpflags & __GFP_NOWARN) && printk_ratelimit())
 		slab_out_of_memory(s, gfpflags, node);

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