netdev - Re: [PATCH v5 net-next 0/4] net: Provide SMP threads for backlog NAPI

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Message-ID: <20240311162004.2322cf84@kernel.org>
Date: Mon, 11 Mar 2024 16:20:04 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>, Eric
 Dumazet <edumazet@...gle.com>, Jesper Dangaard Brouer <hawk@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, Thomas Gleixner <tglx@...utronix.de>,
 Wander Lairson Costa <wander@...hat.com>, Yan Zhai <yan@...udflare.com>
Subject: Re: [PATCH v5 net-next 0/4] net: Provide SMP threads for backlog
 NAPI

On Sat,  9 Mar 2024 10:05:08 +0100 Sebastian Andrzej Siewior wrote:
> The RPS code and "deferred skb free" both send IPI/ function call
> to a remote CPU in which a softirq is raised. This leads to a warning on
> PREEMPT_RT because raising softiqrs from function call led to undesired
> behaviour in the past. I had duct tape in RT for the "deferred skb free"
> and Wander Lairson Costa reported the RPS case.

Seems a bit risky to apply this last minute, could you repost first
thing after the merge window? Sorry..
-- 
pw-bot: defer