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Date:   Tue, 3 Aug 2021 10:11:13 -0700
From:   Cong Wang <>
To:     Jakub Kicinski <>
Cc:     David Miller <>,
        Linux Kernel Network Developers <>,
        "Cong Wang ." <>,
        Peilin Ye <>
Subject: Re: [PATCH net-next] Revert "netdevsim: Add multi-queue support"

On Tue, Aug 3, 2021 at 5:39 AM Jakub Kicinski <> wrote:
> This reverts commit d4861fc6be581561d6964700110a4dede54da6a6.
> netdevsim is for enabling upstream tests, two weeks in
> and there's no sign of upstream test using the "mutli-queue"
> option.

Since when netdevsim is *only* for upstream tests? Even if so,
where is this documented? And why not just point it out when
reviewing it instead of silently waiting for weeks?

> We can add this option back when such test materializes.
> Right now it's dead code.

It is clearly not dead. We internally used it for testing sch_mq,
this is clearly stated in the git log. How did you draw such a
conclusion without talking to authors?

But this does remind me of using netdevsim for tc-testing.


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