netdev - Re: tcp: Do not apply TSO segment limit to non-TSO packets

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Message-ID: <CANn89iLpgUEuHQvyJHR8g3q62-Hi-XfYKeVpLvG__UQLrqR5Bg@mail.gmail.com>
Date:	Mon, 19 Jan 2015 14:38:47 -0800
From:	Eric Dumazet <edumazet@...gle.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Thomas Jarosch <thomas.jarosch@...ra2net.com>,
	netdev <netdev@...r.kernel.org>,
	Steffen Klassert <steffen.klassert@...unet.com>,
	Ben Hutchings <bhutchings@...arflare.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: tcp: Do not apply TSO segment limit to non-TSO packets

On Mon, Jan 19, 2015 at 2:36 PM, Herbert Xu <herbert@...dor.apana.org.au> wrote:
> On Mon, Jan 19, 2015 at 09:19:48AM -0800, Eric Dumazet wrote:
>> Zero sized packets are valid, just take a look at tcpdump ;)
>
> But zero-sized packets in the send queue are not valid and will
> not ever be cleaned, which is what triggered the original bug.

SYN and FIN packets are in the send queue.

They are valid and might have a zero size.
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