Subject: Re: [PATCH] net_sched: codel: fix stale state for empty flows in fq_codel

From: [email-masked]
Date: Wed, 25 Mar 2026 04:10:07 +0000

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <[email-masked]>:

On Mon, 23 Mar 2026 18:49:20 +0100 you wrote:
> From: Jonas Köppeler <[email-masked]>
> 
> When codel_dequeue() finds an empty queue, it resets vars->dropping
> but does not reset vars->first_above_time.  The reference CoDel
> algorithm (Nichols & Jacobson, ACM Queue 2012) resets both:
> 
>   dodeque_result codel_queue_t::dodeque(time_t now) {
>       ...
>       if (r.p == NULL) {
>           first_above_time = 0;   // <-- Linux omits this
>       }
>       ...
>   }
> 
> [...]

Here is the summary with links:
  - net_sched: codel: fix stale state for empty flows in fq_codel
    https://git.kernel.org/netdev/net/c/815980fe6dbb

You are awesome, thank you!
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