Re: [PATCH net-next v3] net: mana: add BQL support

[patchwork-bot+netdevbpf@kernel.org]

Hello:

This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Tue, 13 Oct 2026 17:49:37 -0400 you wrote:
> MANA doesn't support byte queue limits, so each TX queue can hold 256
> WQEs by default, and up to 16384, of up to 64 KB TSO packets, before the
> qdisc layer sees any backpressure. This adds latency to all the flows
> sharing a queue, and defeats AQM qdiscs such as fq_codel, which rely on
> BQL to keep the driver queues short.
> 
> Report the bytes queued and completed to BQL, except for the XDP_TX and
> XDP_REDIRECT frames. These share the SQs, but bypass the qdisc and are
> sent even when the queue is stopped, so BQL can't hold them back.
> Counting them would let sustained XDP traffic keep the queue stopped,
> starving the stack, and the TX watchdog would then either fire while the
> completions still arrive, or, if the XDP sends refreshed trans_start,
> not fire when the completions stop. The XDP SKBs are marked in their
> skb->cb, next to the WQE size, so that their completions are skipped as
> well.
> 
> [...]

Here is the summary with links:
  - [net-next,v3] net: mana: add BQL support
    https://git.kernel.org/netdev/net-next/c/799cdeaa5c39

You are awesome, thank you!
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