netdev - Re: [PATCH v2 net-next 2/6] net: add add indirect call wrapper in skb_release_head

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Message-ID: <CAAVpQUC7cCBtne69RSrwqZSg7ZHWy7-wB2w6hR3vb=NDXc5A6A@mail.gmail.com>
Date: Tue, 14 Oct 2025 20:57:08 -0700
From: Kuniyuki Iwashima <kuniyu@...gle.com>
To: Eric Dumazet <edumazet@...gle.com>
Cc: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>, 
	Jamal Hadi Salim <jhs@...atatu.com>, Cong Wang <xiyou.wangcong@...il.com>, 
	Jiri Pirko <jiri@...nulli.us>, Willem de Bruijn <willemb@...gle.com>, netdev@...r.kernel.org, 
	eric.dumazet@...il.com
Subject: Re: [PATCH v2 net-next 2/6] net: add add indirect call wrapper in skb_release_head_state()

On Tue, Oct 14, 2025 at 10:19 AM Eric Dumazet <edumazet@...gle.com> wrote:
>
> While stress testing UDP senders on a host with expensive indirect
> calls, I found cpus processing TX completions where showing
> a very high cost (20%) in sock_wfree() due to
> CONFIG_MITIGATION_RETPOLINE=y.
>
> Take care of TCP and UDP TX destructors and use INDIRECT_CALL_3() macro.
>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Reviewed-by: Kuniyuki Iwashima <kuniyu@...gle.com>