[PATCH v3 net-next 00/15] net/sched: prepare RTNL removal from qdisc dumps

Eric Dumazet
2026-04-10T18:23:06Z

We add annotations for data-races, so that most dump methods
can run in parallel with data path.

Then change mq and mqprio to no longer acquire each children
qdisc spinlock.

Next round of patches will wait for linux-7.2.

v2/v3: addressed most sashiko.dev feedbacks.
I think remaining problems (in red offloads) are minor
and can be fixed later.

Eric Dumazet (15):
net/sched: rename qstats_overlimit_inc() to qstats_cpu_overlimit_inc()
net/sched: add qstats_cpu_drop_inc() helper
net/sched: add READ_ONCE() in gnet_stats_add_queue[_cpu]
net/sched: add qdisc_qlen_inc() and qdisc_qlen_dec()
net/sched: annotate data-races around sch->qstats.backlog
net/sched: sch_sfb: annotate data-races in sfb_dump_stats()
net/sched: sch_red: annotate data-races in red_dump_stats()
net/sched: sch_fq_codel: remove data-races from fq_codel_dump_stats()
net/sched: sch_pie: annotate data-races in pie_dump_stats()
net/sched: sch_fq_pie: annotate data-races in fq_pie_dump_stats()
net_sched: sch_hhf: annotate data-races in hhf_dump_stats()
net/sched: sch_choke: annotate data-races in choke_dump_stats()
net/sched: sch_cake: annotate data-races in cake_dump_stats()
net/sched: mq: no longer acquire qdisc spinlocks in dump operations
net/sched: taprio: prepare taprio_dump() for RTNL removal

include/net/act_api.h | 4 +-
include/net/gen_stats.h | 9 +-
include/net/pie.h | 2 +-
include/net/sch_generic.h | 71 +++++--
net/core/gen_estimator.c | 24 +--
net/core/gen_stats.c | 37 ++--
net/sched/act_api.c | 2 +-
net/sched/act_bpf.c | 2 +-
net/sched/act_ife.c | 12 +-
net/sched/act_mpls.c | 2 +-
net/sched/act_police.c | 4 +-
net/sched/act_skbedit.c | 2 +-
net/sched/act_skbmod.c | 2 +-
net/sched/sch_api.c | 4 +-
net/sched/sch_cake.c | 422 +++++++++++++++++++++-----------------
net/sched/sch_cbs.c | 6 +-
net/sched/sch_choke.c | 34 +--
net/sched/sch_codel.c | 2 +-
net/sched/sch_drr.c | 6 +-
net/sched/sch_dualpi2.c | 4 +-
net/sched/sch_etf.c | 8 +-
net/sched/sch_ets.c | 6 +-
net/sched/sch_fq.c | 6 +-
net/sched/sch_fq_codel.c | 16 +-
net/sched/sch_fq_pie.c | 27 +--
net/sched/sch_generic.c | 8 +-
net/sched/sch_gred.c | 4 +-
net/sched/sch_hfsc.c | 6 +-
net/sched/sch_hhf.c | 26 +--
net/sched/sch_htb.c | 6 +-
net/sched/sch_mq.c | 36 ++--
net/sched/sch_mqprio.c | 81 ++++----
net/sched/sch_multiq.c | 4 +-
net/sched/sch_netem.c | 12 +-
net/sched/sch_pie.c | 38 ++--
net/sched/sch_prio.c | 6 +-
net/sched/sch_qfq.c | 8 +-
net/sched/sch_red.c | 37 ++--
net/sched/sch_sfb.c | 54 +++--
net/sched/sch_sfq.c | 11 +-
net/sched/sch_skbprio.c | 4 +-
net/sched/sch_taprio.c | 46 +++--
net/sched/sch_tbf.c | 10 +-
net/sched/sch_teql.c | 2 +-
44 files changed, 624 insertions(+), 489 deletions(-)

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2.53.0.1213.gd9a14994de-goog