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Subject[PATCH 26/40] autonuma: default mempolicy follow AutoNUMA
Date
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 1d771e4..86c0df0 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1945,10 +1945,21 @@ 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->task_autonuma)
+ nid = current->task_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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