[PATCH 25/35] autonuma: default mempolicy follow AutoNUMA

Andrea Arcangeli
2012-05-25T17:03:28Z

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 88f9422..b6b88f6 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1925,10 +1925,21 @@ 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;