Fixed excess bucket information for unplug histograms.

diff --git a/btt/unplug_hist.c b/btt/unplug_hist.c
index 4971f31298fa3d9f1b85f06554fbcb4f9ee8fc24..aaa4c39116e27db6d489b069069ec2e797311e02 100644 (file)
--- a/btt/unplug_hist.c
+++ b/btt/unplug_hist.c
@@ -23,7 +23,7 @@
 #define BKT_WIDTH      5
 #define MAX_BKT                19
 #define EXCESS_BKT     20
-#define NBKTS          EXCESS_BKT
+#define NBKTS          (EXCESS_BKT + 1)
 
 struct hist_bkt {
        __u32 dev;
@@ -56,7 +56,7 @@ void unplug_hist_add(struct io *u_iop)
                struct hist_bkt *hbp = dip->unplug_hist_handle;
 
                idx = (n_unplugs / BKT_WIDTH);
-               if (idx > MAX_BKT)
+               if (idx > EXCESS_BKT)
                        idx = EXCESS_BKT;
 
                assert((0 <= idx) && (idx <= EXCESS_BKT));