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| author | Eric Dumazet <edumazet@google.com> | 2026-03-04 04:56:40 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-03-05 04:54:22 +0300 |
| commit | a4c2b8be2e5329e7fac6e8f64ddcb8958155cfcb (patch) | |
| tree | 9493c38f57bd0528ce1bce63429d4de25d09c44d | |
| parent | f7d92f11bd33a6eb49c7c812255ef4ab13681f0f (diff) | |
| download | linux-a4c2b8be2e5329e7fac6e8f64ddcb8958155cfcb.tar.xz | |
net_sched: sch_fq: clear q->band_pkt_count[] in fq_reset()
When/if a NIC resets, queues are deactivated by dev_deactivate_many(),
then reactivated when the reset operation completes.
fq_reset() removes all the skbs from various queues.
If we do not clear q->band_pkt_count[], these counters keep growing
and can eventually reach sch->limit, preventing new packets to be queued.
Many thanks to Praveen for discovering the root cause.
Fixes: 29f834aa326e ("net_sched: sch_fq: add 3 bands and WRR scheduling")
Diagnosed-by: Praveen Kaligineedi <pkaligineedi@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Neal Cardwell <ncardwell@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260304015640.961780-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | net/sched/sch_fq.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/sched/sch_fq.c b/net/sched/sch_fq.c index 80235e85f844..05084c9af48e 100644 --- a/net/sched/sch_fq.c +++ b/net/sched/sch_fq.c @@ -827,6 +827,7 @@ static void fq_reset(struct Qdisc *sch) for (idx = 0; idx < FQ_BANDS; idx++) { q->band_flows[idx].new_flows.first = NULL; q->band_flows[idx].old_flows.first = NULL; + q->band_pkt_count[idx] = 0; } q->delayed = RB_ROOT; q->flows = 0; |