[PATCH 29/39] autonuma: default mempolicy follow AutoNUMA

[Andrea Arcangeli <aarcange@redhat.com>]

If the task has already been moved to an autonuma_node try to allocate
memory from it even if it's temporarily not the local node. Chances
are it's where most of its memory is already located and where it will
run in the future.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
---
 mm/mempolicy.c |   15 +++++++++++++--
 1 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index cfb6c86..f3c03cb 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1929,10 +1929,21 @@ retry_cpuset:
 	 */
 	if (pol->mode == MPOL_INTERLEAVE)
 		page = alloc_page_interleave(gfp, order, interleave_nodes(pol));
-	else
+	else {
+		int nid;
+#ifdef CONFIG_AUTONUMA
+		nid = -1;
+		if (current->sched_autonuma)
+			nid = current->sched_autonuma->autonuma_node;
+		if (nid < 0)
+			nid = numa_node_id();
+#else
+		nid = numa_node_id();
+#endif
 		page = __alloc_pages_nodemask(gfp, order,
-				policy_zonelist(gfp, pol, numa_node_id()),
+				policy_zonelist(gfp, pol, nid),
 				policy_nodemask(gfp, pol));
+	}
 
 	if (unlikely(!put_mems_allowed(cpuset_mems_cookie) && !page))
 		goto retry_cpuset;

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