This patchset fixes the packet stuck problem mentioned in [1].
Patch 1: Add STATE_MISSED flag to fix packet stuck problem. Patch 2: Fix a tx_action rescheduling problem after STATE_MISSED flag is added in patch 1. Patch 3: Fix the significantly higher CPU consumption problem when multiple threads are competing on a saturated outgoing device.
V6: Some performance optimization in patch 1 suggested by Jakub and drop NET_XMIT_DROP checking in patch 3. V5: add patch 3 to fix the problem reported by Michal Kubecek. V4: Change STATE_NEED_RESCHEDULE to STATE_MISSED and add patch 2.
[1]. https://lkml.org/lkml/2019/10/9/42
Yunsheng Lin (3): net: sched: fix packet stuck problem for lockless qdisc net: sched: fix endless tx action reschedule during deactivation net: sched: fix tx action reschedule issue with stopped queue
include/net/pkt_sched.h | 7 +------ include/net/sch_generic.h | 33 ++++++++++++++++++++++++++++++++- net/core/dev.c | 29 ++++++++++++++++++++++++----- net/sched/sch_generic.c | 31 +++++++++++++++++++++++++++++-- 4 files changed, 86 insertions(+), 14 deletions(-)