Currently vmalloc is used for the zone wait table possibly generating the need
to generate lots of TLBs to access the tables. We can now use GFP_VFALLBACK to
attempt the use of a physically contiguous page that can then use the large
kernel TLBs.

Signed-off-by: Christoph Lameter <clameter@sgi.com>

---
 mm/page_alloc.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: linux-2.6/mm/page_alloc.c
===================================================================
--- linux-2.6.orig/mm/page_alloc.c	2007-09-24 18:48:06.000000000 -0700
+++ linux-2.6/mm/page_alloc.c	2007-09-24 18:48:16.000000000 -0700
@@ -2550,7 +2550,9 @@ int zone_wait_table_init(struct zone *zo
 		 * To use this new node's memory, further consideration will be
 		 * necessary.
 		 */
-		zone->wait_table = (wait_queue_head_t *)vmalloc(alloc_size);
+		zone->wait_table = (wait_queue_head_t *)
+			__get_free_pages(GFP_VFALLBACK,
+					get_order(alloc_size));
 	}
 	if (!zone->wait_table)
 		return -ENOMEM;

-- 
-
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