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authorEric Dumazet <edumazet@google.com>2014-11-25 19:57:29 +0300
committerDavid S. Miller <davem@davemloft.net>2014-11-26 20:08:04 +0300
commitced7a04e394fe1df41d13b833baab5cfcb1d03b3 (patch)
treed7b4cd32ef3b882498b3578ee14ed73db8ba231d /net/sched
parentd3fc6b3fddd54c2220a075aefc4e5e5ca25cff34 (diff)
downloadlinux-ced7a04e394fe1df41d13b833baab5cfcb1d03b3.tar.xz
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>
Diffstat (limited to 'net/sched')
-rw-r--r--net/sched/sch_fq.c9
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++;
}