pkt_sched: fq: increase max delay from 125 ms to one second

FQ/pacing has a clamp of delay of 125 ms, to avoid some possible harm.

It turns out this delay is too small to allow pacing low rates :
Some ISP setup very aggressive policers as low as 16kbit.

Now TCP stack has spurious rtx prevention, it seems safe to increase
this fixed parameter, without adding a qdisc attribute.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 5 deletions

diff --git a/net/sched/sch_fq.c b/net/sched/sch_fq.c
index cbd7e1fd23b4..9b05924cc386 100644
--- a/net/sched/sch_fq.c
+++ b/net/sched/sch_fq.c
@@ -481,12 +481,11 @@ begin:
                 if (likely(rate))
                         do_div(len, rate);
                 /* Since socket rate can change later,
-                 * clamp the delay to 125 ms.
-                 * TODO: maybe segment the too big skb, as in commit
-                 * e43ac79a4bc ("sch_tbf: segment too big GSO packets")
+                 * clamp the delay to 1 second.
+                 * Really, providers of too big packets should be fixed !
                  */
-                if (unlikely(len > 125 * NSEC_PER_MSEC)) {
-                        len = 125 * NSEC_PER_MSEC;
+                if (unlikely(len > NSEC_PER_SEC)) {
+                        len = NSEC_PER_SEC;
                         q->stat_pkts_too_long++;
                 }