netdev - Re: [PATCH] net: Add ndo_gso

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Message-ID: <1412115071.16704.1.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Tue, 30 Sep 2014 15:11:11 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Stephen Hemminger <stephen@...workplumber.org>
Cc:	Tom Herbert <therbert@...gle.com>,
	Or Gerlitz <gerlitz.or@...il.com>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Alexander Duyck <alexander.h.duyck@...el.com>,
	David Miller <davem@...emloft.net>,
	Linux Netdev List <netdev@...r.kernel.org>,
	Thomas Graf <tgraf@...g.ch>,
	Pravin Shelar <pshelar@...ira.com>,
	John Fastabend <john.r.fastabend@...el.com>,
	Andy Zhou <azhou@...ira.com>
Subject: Re: [PATCH] net: Add ndo_gso_check

On Tue, 2014-09-30 at 14:37 -0700, Stephen Hemminger wrote:

> Software GSO at driver level is sometimes better anyway because it means driver can
> enqueue a burst of packets into Tx ring.

Yes, and it can save a lot of churn (allocating sk_buff, copying ~256
bytes, bunch of atomic ops...)



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