netdev - Re: [PATCH net v4 2/2] selftests/tc-testing: Check backlog stats in gso

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Message-ID: <aIpcTv4ayyP+ya25@pop-os.localdomain>
Date: Wed, 30 Jul 2025 10:54:22 -0700
From: Cong Wang <xiyou.wangcong@...il.com>
To: William Liu <will@...lsroot.io>
Cc: netdev@...r.kernel.org, jhs@...atatu.com, pabeni@...hat.com,
	kuba@...nel.org, jiri@...nulli.us, davem@...emloft.net,
	edumazet@...gle.com, horms@...nel.org, savy@...t3mfailure.io,
	victor@...atatu.com
Subject: Re: [PATCH net v4 2/2] selftests/tc-testing: Check backlog stats in
 gso_skb case

On Sun, Jul 27, 2025 at 11:57:10PM +0000, William Liu wrote:
> +        "setup": [
> +            "$IP link set dev $DUMMY up || true",
> +            "$IP addr add 10.10.11.10/24 dev $DUMMY || true",
> +            "$TC qdisc add dev $DUMMY root handle 1: tbf rate 8bit burst 100b latency 100ms",
> +            "$TC qdisc replace dev $DUMMY handle 2: parent 1:1 hhf limit 1000",
> +            [
> +                "ping -I $DUMMY -c2 10.10.11.11",
> +                1
> +            ],

Sorry, I still have troubles understanding the magic "1" here, and I
don't find any other selftest using it. So why do we need it here?

You said it is in the original reproducer, but the original reproducer
is not part of tc-testing. This does not explain to me.

Thanks.