[RFC] mm: show message when updating min_free_kbytes in thp

Han Pingtian
2014-01-01T00:29:44Z

min_free_kbytes may be updated during thp's initialization. Sometimes,
this will change the value being set by user. Showing message will
clarify this confusion.

Signed-off-by: Han Pingtian <hanpt@linux.vnet.ibm.com>
---
mm/huge_memory.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 7de1bf8..46011c6 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -130,8 +130,11 @@ static int set_recommended_min_free_kbytes(void)
(unsigned long) nr_free_buffer_pages() / 20);
recommended_min <<= (PAGE_SHIFT-10);

- if (recommended_min > min_free_kbytes)
+ if (recommended_min > min_free_kbytes) {
min_free_kbytes = recommended_min;
+ pr_info("min_free_kbytes is updated to %d by enabling transparent hugepage.\n",
+ min_free_kbytes);
+ }
setup_per_zone_wmarks();
return 0;
}
--
1.7.7.6