[PATCH 34/35] autonuma: boost khugepaged scanning rate

Andrea Arcangeli
2012-05-25T17:09:30Z

Until THP native migration is implemented it's safer to boost
khugepaged scanning rate because all memory migration are splitting
the hugepages. So the regular rate of scanning becomes too low when
lots of memory is migrated.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
---
mm/huge_memory.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 017c0a3..b919c0c 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -573,6 +573,14 @@ static int __init hugepage_init(void)

set_recommended_min_free_kbytes();

+#ifdef CONFIG_AUTONUMA
+ /* Hack, remove after THP native migration */
+ if (num_possible_nodes() > 1) {
+ khugepaged_scan_sleep_millisecs = 100;
+ khugepaged_alloc_sleep_millisecs = 10000;
+ }
+#endif
+
return 0;
out:
hugepage_exit_sysfs(hugepage_kobj);