linux-kernel - Re: [PATCH v3] tun: avoid high-order page allocation for packet header

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Message-ID: <fc219fe5f8c8dec66a6fdff08f40acf714b8328b.camel@amazon.com>
Date:   Wed, 9 Aug 2023 13:53:26 +0000
From:   "Erdogan, Tahsin" <trdgn@...zon.com>
To:     "herbert@...dor.apana.org.au" <herbert@...dor.apana.org.au>,
        "jasowang@...hat.com" <jasowang@...hat.com>,
        "willemdebruijn.kernel@...il.com" <willemdebruijn.kernel@...il.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        "pabeni@...hat.com" <pabeni@...hat.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] tun: avoid high-order page allocation for packet header

On Wed, 2023-08-09 at 09:18 -0400, Willem de Bruijn wrote:
> Tun sendmsg is a special case, only used by vhost-net from inside the
> kernel. Arguably consistency with packet_snd/packet_alloc_skb would
> be
> more important. That said, this makes sense to me. I assume your
> configuring a device with very large MTU?

That's right. I am setting MTU to 9100 in my test.