netdev - [PATCH iproute2-next] tc: pie: change maximum integer value of tc_pie

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Message-Id: <20200305162540.4363-1-lesliemonis@gmail.com>
Date:   Thu,  5 Mar 2020 21:55:40 +0530
From:   Leslie Monis <lesliemonis@...il.com>
To:     Linux NetDev <netdev@...r.kernel.org>
Cc:     David Ahern <dsahern@...il.com>,
        Stephen Hemminger <stephen@...workplumber.org>,
        "Mohit P . Tahiliani" <tahiliani@...k.edu.in>,
        Gautam Ramakrishnan <gautamramk@...il.com>
Subject: [PATCH iproute2-next] tc: pie: change maximum integer value of tc_pie_xstats->prob

Kernel commit 105e808c1da2 ("pie: remove pie_vars->accu_prob_overflows"),
changes the maximum value of tc_pie_xstats->prob from (2^64 - 1) to
(2^56 - 1).

Signed-off-by: Mohit P. Tahiliani <tahiliani@...k.edu.in>
Signed-off-by: Gautam Ramakrishnan <gautamramk@...il.com>
Signed-off-by: Leslie Monis <lesliemonis@...il.com>
---
 tc/q_pie.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tc/q_pie.c b/tc/q_pie.c
index 709a78b4..e6939652 100644
--- a/tc/q_pie.c
+++ b/tc/q_pie.c
@@ -223,9 +223,9 @@ static int pie_print_xstats(struct qdisc_util *qu, FILE *f,
 
 	st = RTA_DATA(xstats);
 
-	/* prob is returned as a fracion of maximum integer value */
+	/* prob is returned as a fracion of (2^56 - 1) */
 	print_float(PRINT_ANY, "prob", "  prob %lg",
-		    (double)st->prob / (double)UINT64_MAX);
+		    (double)st->prob / (double)(UINT64_MAX >> 8));
 	print_uint(PRINT_JSON, "delay", NULL, st->delay);
 	print_string(PRINT_FP, NULL, " delay %s", sprint_time(st->delay, b1));
 
-- 
2.17.1