netdev - Re: [PATCH bpf] xsk: fix backpressure mechanism on Tx

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Date:   Wed, 31 Aug 2022 19:00:16 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Maciej Fijalkowski <maciej.fijalkowski@...el.com>
Cc:     bpf@...r.kernel.org, ast@...nel.org, daniel@...earbox.net,
        andrii@...nel.org, netdev@...r.kernel.org,
        magnus.karlsson@...el.com, bjorn@...nel.org
Subject: Re: [PATCH bpf] xsk: fix backpressure mechanism on Tx

Hello:

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

On Tue, 30 Aug 2022 14:17:05 +0200 you wrote:
> Commit d678cbd2f867 ("xsk: Fix handling of invalid descriptors in XSK TX
> batching API") fixed batch API usage against set of descriptors with
> invalid ones but introduced a problem when AF_XDP SW rings are smaller
> than HW ones. Mismatch of reported Tx'ed frames between HW generator and
> user space app was observed. It turned out that backpressure mechanism
> became a bottleneck when the amount of produced descriptors to CQ is
> lower than what we grabbed from XSK Tx ring.
> 
> [...]

Here is the summary with links:
  - [bpf] xsk: fix backpressure mechanism on Tx
    https://git.kernel.org/bpf/bpf/c/c00c4461689e

You are awesome, thank you!
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