| From | Andrea Arcangeli <> | Subject | [PATCH 20/36] autonuma: default mempolicy follow AutoNUMA | Date | Wed, 22 Aug 2012 16:59:04 +0200 |
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If an task_selected_nid has already been selected for the task, 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.
Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> --- mm/mempolicy.c | 12 ++++++++++-- 1 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index bd92431..19a8f72 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -1951,10 +1951,18 @@ retry_cpuset: */ if (pol->mode == MPOL_INTERLEAVE) page = alloc_page_interleave(gfp, order, interleave_nodes(pol)); - else + else { + int nid = -1; +#ifdef CONFIG_AUTONUMA + if (current->task_autonuma) + nid = current->task_autonuma->task_selected_nid; +#endif + if (nid < 0) + nid = numa_node_id(); 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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