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SubjectRe: [Xen-devel] "tcp: refine TSO autosizing" causes performance regression on Xen
Eric Dumazet <> wrote:
> We already have netdev->gso_max_size and netdev->gso_max_segs
> which are cached into sk->sk_gso_max_size & sk->sk_gso_max_segs

It is quite dangerous to attempt tricks like this because a
tc redirection or netfilter nat could change the destination
device rendering such hints incorrect.

Email: Herbert Xu <>
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