netdev - Re: [PATCH net v2 1/2] gianfar: Replace skb_realloc_headroom with skb_cow

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Message-ID: <20201103172441.2xyyr3dkabtgfeao@skbuf>
Date:   Tue, 3 Nov 2020 19:24:41 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Claudiu Manoil <claudiu.manoil@....com>,
        Julian Wiedmann <jwi@...ux.ibm.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "David S . Miller" <davem@...emloft.net>,
        "james.jurack@...tek.com" <james.jurack@...tek.com>
Subject: Re: [PATCH net v2 1/2] gianfar: Replace skb_realloc_headroom with
 skb_cow_head for PTP

On Tue, Nov 03, 2020 at 09:12:26AM -0800, Jakub Kicinski wrote:
> While it is something to be fixed - is anything other than pktgen
> making use of IFF_TX_SKB_SHARING? Are you running pktgen, Vladimir?

Nope, just iperf3 TCP and PTP. The problem is actually with PTP, I've
been testing gianfar with just TCP for a long while.