netdev - Re: [PATCH net-next 1/2] mptcp: don't need to check SKB_EXT_MPTCP in mptcp_reset

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Date: Fri, 05 Apr 2024 09:47:51 +0200
From: Paolo Abeni <pabeni@...hat.com>
To: Jason Xing <kerneljasonxing@...il.com>, davem@...emloft.net, 
 edumazet@...gle.com, kuba@...nel.org, matttbe@...nel.org,
 martineau@...nel.org,  geliang@...nel.org
Cc: mptcp@...ts.linux.dev, netdev@...r.kernel.org, Jason Xing
	 <kernelxing@...cent.com>
Subject: Re: [PATCH net-next 1/2] mptcp: don't need to check SKB_EXT_MPTCP
 in mptcp_reset_option()

On Fri, 2024-04-05 at 10:39 +0800, Jason Xing wrote:
> From: Jason Xing <kernelxing@...cent.com>
> 
> Before this, what mptcp_reset_option() checks is totally the same as
> mptcp_get_ext() does, so we could skip it.

Note that the somewhat duplicate test is (a possibly not great)
optimization to avoid jumping in the mptcp code (possible icache
misses) for plain TCP sockets.

I guess we want to maintain it.

Cheers,

Paolo