From: Simon Horman <horms@kernel.org>
To: Cong Wang <xiyou.wangcong@gmail.com>
Cc: netdev@vger.kernel.org, jiri@resnulli.us, jhs@mojatatu.com,
Mingi Cho <mincho@theori.io>
Subject: Re: [Patch net 2/2] selftests/tc-testing: Add an HFSC qlen accounting test
Date: Wed, 21 May 2025 10:18:59 +0100 [thread overview]
Message-ID: <20250521091859.GV365796@horms.kernel.org> (raw)
In-Reply-To: <20250518222038.58538-3-xiyou.wangcong@gmail.com>
On Sun, May 18, 2025 at 03:20:38PM -0700, Cong Wang wrote:
> This test reproduces a scenario where HFSC queue length and backlog accounting
> can become inconsistent when a peek operation triggers a dequeue and possible
> drop before the parent qdisc updates its counters. The test sets up a DRR root
> qdisc with an HFSC class, netem, and blackhole children, and uses Scapy to
> inject a packet. It helps to verify that HFSC correctly tracks qlen and backlog
> even when packets are dropped during peek-induced dequeue.
>
> Cc: Mingi Cho <mincho@theori.io>
> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
next prev parent reply other threads:[~2025-05-21 9:19 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-18 22:20 [Patch net 0/2] net_sched: Fix HFSC qlen/backlog accounting bug and add selftest Cong Wang
2025-05-18 22:20 ` [Patch net 1/2] sch_hfsc: Fix qlen accounting bug when using peek in hfsc_enqueue() Cong Wang
2025-05-21 9:18 ` Simon Horman
2025-05-18 22:20 ` [Patch net 2/2] selftests/tc-testing: Add an HFSC qlen accounting test Cong Wang
2025-05-21 9:18 ` Simon Horman [this message]
2025-05-21 11:07 ` [Patch net 0/2] net_sched: Fix HFSC qlen/backlog accounting bug and add selftest Jamal Hadi Salim
2025-05-22 9:30 ` patchwork-bot+netdevbpf
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