netdev - Re: [PATCH net-next] net/core: Enable socket busy polling on -RT

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Date: Fri, 26 May 2023 08:00:19 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Kurt Kanzenbach <kurt@...utronix.de>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com, netdev@...r.kernel.org, bigeasy@...utronix.de
Subject: Re: [PATCH net-next] net/core: Enable socket busy polling on -RT

Hello:

This patch was applied to netdev/net-next.git (main)
by David S. Miller <davem@...emloft.net>:

On Tue, 23 May 2023 13:15:18 +0200 you wrote:
> Busy polling is currently not allowed on PREEMPT_RT, because it disables
> preemption while invoking the NAPI callback. It is not possible to acquire
> sleeping locks with disabled preemption. For details see commit
> 20ab39d13e2e ("net/core: disable NET_RX_BUSY_POLL on PREEMPT_RT").
> 
> However, strict cyclic and/or low latency network applications may prefer busy
> polling e.g., using AF_XDP instead of interrupt driven communication.
> 
> [...]

Here is the summary with links:
  - [net-next] net/core: Enable socket busy polling on -RT
    https://git.kernel.org/netdev/net-next/c/c857946a4e26

You are awesome, thank you!
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