netdev - Re: [PATCH net 1/2] geneve, vxlan: Don't check skb

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Date:   Mon, 15 Oct 2018 12:19:41 +0200
From:   Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:     Stefano Brivio <sbrivio@...hat.com>,
        "David S. Miller" <davem@...emloft.net>
Cc:     Xin Long <lucien.xin@...il.com>,
        Sabrina Dubroca <sd@...asysnail.net>, netdev@...r.kernel.org
Subject: Re: [PATCH net 1/2] geneve, vxlan: Don't check skb_dst() twice

Le 12/10/2018 à 23:53, Stefano Brivio a écrit :
> Commit f15ca723c1eb ("net: don't call update_pmtu unconditionally") avoids
> that we try updating PMTU for a non-existent destination, but didn't clean
> up cases where the check was already explicit. Drop those redundant checks.
Yes, I leave them to avoid calculating the new mtu value when not needed. We are
in the xmit path.
As skb_dst_update_pmtu() is inlined, we probably don't care, but gcc could still
decide to not inline it.


Regards,
Nicolas