netdev - Re: [PATCH v4 net-next] xsk: avoid starving the xsk further down the list

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Date: Tue, 24 Oct 2023 10:00:23 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Albert Huang <huangjie.albert@...edance.com>
Cc: bjorn@...nel.org, magnus.karlsson@...el.com, maciej.fijalkowski@...el.com,
 jonathan.lemon@...il.com, davem@...emloft.net, edumazet@...gle.com,
 kuba@...nel.org, pabeni@...hat.com, ast@...nel.org, daniel@...earbox.net,
 hawk@...nel.org, john.fastabend@...il.com, netdev@...r.kernel.org,
 bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 net-next] xsk: avoid starving the xsk further down the list

Hello:

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

On Mon, 23 Oct 2023 20:57:31 +0800 you wrote:
> In the previous implementation, when multiple xsk sockets were
> associated with a single xsk_buff_pool, a situation could arise
> where the xsk_tx_list maintained data at the front for one xsk
> socket while starving the xsk sockets at the back of the list.
> This could result in issues such as the inability to transmit packets,
> increased latency, and jitter. To address this problem, we introduce
> a new variable called tx_budget_spent, which limits each xsk to transmit
> a maximum of MAX_PER_SOCKET_BUDGET tx descriptors. This allocation ensures
> equitable opportunities for subsequent xsk sockets to send tx descriptors.
> The value of MAX_PER_SOCKET_BUDGET is set to 32.
> 
> [...]

Here is the summary with links:
  - [v4,net-next] xsk: avoid starving the xsk further down the list
    https://git.kernel.org/bpf/bpf-next/c/99b29a499b5f

You are awesome, thank you!
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