netdev - Re: [PATCH net] gve: Fix an edge case for TSO skb validity check

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Message-ID: <CANH7hM6RA1-OLzu8dyz9b7oz+tiOmD0W7NAxyD9=c7qvj=+TZQ@mail.gmail.com>
Date: Thu, 18 Jul 2024 17:27:53 -0700
From: Bailey Forrest <bcf@...gle.com>
To: Willem de Bruijn <willemdebruijn.kernel@...il.com>
Cc: Praveen Kaligineedi <pkaligineedi@...gle.com>, netdev@...r.kernel.org, davem@...emloft.net, 
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com, willemb@...gle.com, 
	shailend@...gle.com, hramamurthy@...gle.com, csully@...gle.com, 
	jfraker@...gle.com, stable@...r.kernel.org, 
	Jeroen de Borst <jeroendb@...gle.com>
Subject: Re: [PATCH net] gve: Fix an edge case for TSO skb validity check

On Thu, Jul 18, 2024 at 4:07 PM Willem de Bruijn
<willemdebruijn.kernel@...il.com> wrote:
>
> This however loops skb->len / gso_size. While the above modulo
> operation skips many segments that span a frag. Not sure if the more
> intuitive approach could be as performant.

Yes, the original intention of the code was to loop over nr_frags,
instead of (skb->len / gso_size).

But perhaps that's premature optimization if it makes the code
significantly harder to follow.