github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-12 16:18:45 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

net/sched: Add precise drop reason for pfifo_fast queue overflows

Browse Source 
Currently, packets dropped by pfifo_fast due to queue overflow are
marked with a generic SKB_DROP_REASON_QDISC_DROP in __dev_xmit_skb().

This patch adds explicit drop reason SKB_DROP_REASON_QDISC_OVERLIMIT
for queue-full cases, providing better distinction from other qdisc drops.

Signed-off-by: Fan Yu <fan.yu9@zte.com.cn>
Reviewed-by: Cong Wang <xiyou.wangcong@gmail.com>
Link: https://patch.msgid.link/20250724212837119BP9HOs0ibXDRWgsXMMir7@zte.com.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Fan Yu 2025-07-24 21:28:37 +08:00 committed by Jakub Kicinski
parent fad4df29c2
commit bf3c032bfe
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
net/sched/sch_generic.c
View File

@ -740,6 +740,8 @@ static int pfifo_fast_enqueue(struct sk_buff *skb, struct Qdisc *qdisc,
err = skb_array_produce(q, skb);
if (unlikely(err)) {
tcf_set_drop_reason(skb, SKB_DROP_REASON_QDISC_OVERLIMIT);
if (qdisc_is_percpu_stats(qdisc))
return qdisc_drop_cpu(skb, qdisc, to_free);
else