[PATCH v2] mm/page-writeback: Update the comment of Dirty position control

[Chi Wu]

As the value of pos_ratio_polynom() clamp between 0 and
2LL << RATELIMIT_CALC_SHIFT, the global control line should be
consistent with it.

Signed-off-by: Chi Wu <wuchi.zero@xxxxxxxxx>
---
 mm/page-writeback.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 0062d5c57d41..3882405dc051 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -845,7 +845,7 @@ static long long pos_ratio_polynom(unsigned long setpoint,
  *     ^ pos_ratio
  *     |
  *     |            |<===== global dirty control scope ======>|
- * 2.0 .............*
+ * 2.0  * * * * * * *
  *     |            .*
  *     |            . *
  *     |            .   *
-- 
2.17.1