mm/page-writeback.c: document bdi_min_ratio

Looks like someone got distracted after adding the comment characters.

Signed-off-by: Johannes Weiner <jweiner@redhat.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 8c6becd07be705b20a5be140ac7d3dcc7ea363d0..fbdda3bc36dee3d78e7d148cbaf1ff1e976d5dbe 100644 (file)
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -310,7 +310,9 @@ static void bdi_writeout_fraction(struct backing_dev_info *bdi,
 }
 
 /*
- *
+ * bdi_min_ratio keeps the sum of the minimum dirty shares of all
+ * registered backing devices, which, for obvious reasons, can not
+ * exceed 100%.
  */
 static unsigned int bdi_min_ratio;