sch_hfsc: always keep backlog updated
hfsc updates backlog lazily, that is only when we dump the stats. This is problematic after we begin to update backlog in qdisc_tree_reduce_backlog(). Reported-by: Stas Nichiporovich <stasn77@gmail.com> Tested-by: Stas Nichiporovich <stasn77@gmail.com> Fixes: 2ccccf5f ("net_sched: update hierarchical backlog too") Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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