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-rw-r--r--mm/mempolicy.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index aff1f1e..196d8da 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -2378,6 +2378,18 @@ int mpol_misplaced(struct page *page, struct vm_area_struct *vma, unsigned long
last_nidpid = page_nidpid_xchg_last(page, this_nidpid);
if (!nidpid_pid_unset(last_nidpid) && nidpid_to_nid(last_nidpid) != polnid)
goto out;
+
+#ifdef CONFIG_NUMA_BALANCING
+ /*
+ * If the scheduler has just moved us away from our
+ * preferred node, do not bother migrating pages yet.
+ * This way a short and temporary process migration will
+ * not cause excessive memory migration.
+ */
+ if (polnid != current->numa_preferred_nid &&
+ !current->numa_migrate_seq)
+ goto out;
+#endif
}
if (curnid != polnid)
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