netdev - Re: [PATCH 0/9 Rev3] Implement batching skb API and support in IPoIB

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Date:	Wed, 08 Aug 2007 21:27:27 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	krkumar2@...ibm.com
Cc:	gaagaan@...il.com, general@...ts.openfabrics.org, hadi@...erus.ca,
	herbert@...dor.apana.org.au, jagana@...ibm.com, jeff@...zik.org,
	johnpol@....mipt.ru, kaber@...sh.net, kumarkr@...ux.ibm.com,
	mcarlson@...adcom.com, mchan@...adcom.com, netdev@...r.kernel.org,
	peter.p.waskiewicz.jr@...el.com, rdreier@...co.com,
	rick.jones2@...com, Robert.Olsson@...a.slu.se,
	shemminger@...ux-foundation.org, sri@...ibm.com, tgraf@...g.ch,
	xma@...ibm.com
Subject: Re: [PATCH 0/9 Rev3] Implement batching skb API and support in
 IPoIB

From: Krishna Kumar2 <krkumar2@...ibm.com>
Date: Thu, 9 Aug 2007 09:49:57 +0530

> Patrick had suggested calling dev_hard_start_xmit() instead of
> conditionally calling the new API and to remove the new API
> entirely. The driver determines whether batching is required or
> not depending on (skb==NULL) or not. Would that approach be fine
> with this "single interface" goal ?

It is a valid posibility.

Note that this is similar to how we handle TSO, the driver
sets the feature bit and in its ->hard_start_xmit() it checks
the SKB for the given offload property.
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