Commit 3f95f55e authored Mar 10, 2020 by Leslie Monis Committed by David S. Miller Mar 09, 2020

net: sched: pie: change tc_pie_xstats->prob



Commit 105e808c ("pie: remove pie_vars->accu_prob_overflows")
changes the scale of probability values in PIE from (2^64 - 1) to
(2^56 - 1). This affects the precision of tc_pie_xstats->prob in
user space.

This patch ensures user space is unaffected.

Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Leslie Monis <lesliemonis@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent e08ab0b3

net/sched/sch_pie.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -493,7 +493,7 @@ static int pie_dump_stats(struct Qdisc sch, struct gnet_dump d)
		{
		struct pie_sched_data *q = qdisc_priv(sch);
		struct tc_pie_xstats st = {
		.prob = q->vars.prob,
		.prob = q->vars.prob << BITS_PER_BYTE,
		.delay = ((u32)PSCHED_TICKS2NS(q->vars.qdelay)) /
		NSEC_PER_USEC,
		.packets_in = q->stats.packets_in,

Admin message