netdev - Re: [PATCH bpf v3] xdp: Fix spurious packet loss in generic XDP TX path

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Date:   Wed, 06 Jul 2022 14:50:16 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Johan Almbladh <johan.almbladh@...finetworks.com>
Cc:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, hawk@...nel.org, john.fastabend@...il.com,
        song@...nel.org, martin.lau@...ux.dev, yhs@...com,
        kpsingh@...nel.org, sdf@...gle.com, haoluo@...gle.com,
        jolsa@...nel.org, Freysteinn.Alfredsson@....se, toke@...hat.com,
        bpf@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH bpf v3] xdp: Fix spurious packet loss in generic XDP TX path

Hello:

This patch was applied to bpf/bpf.git (master)
by Daniel Borkmann <daniel@...earbox.net>:

On Tue,  5 Jul 2022 10:23:45 +0200 you wrote:
> The byte queue limits (BQL) mechanism is intended to move queuing from
> the driver to the network stack in order to reduce latency caused by
> excessive queuing in hardware. However, when transmitting or redirecting
> a packet using generic XDP, the qdisc layer is bypassed and there are no
> additional queues. Since netif_xmit_stopped() also takes BQL limits into
> account, but without having any alternative queuing, packets are
> silently dropped.
> 
> [...]

Here is the summary with links:
  - [bpf,v3] xdp: Fix spurious packet loss in generic XDP TX path
    https://git.kernel.org/bpf/bpf/c/1fd6e5675336

You are awesome, thank you!
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