netdev - Re: [PATCH 0/2] Get rid of ndo_xmit

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Date:	Fri, 29 Aug 2014 20:22:10 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	hannes@...essinduktion.org
Cc:	netdev@...r.kernel.org, therbert@...gle.com, jhs@...atatu.com,
	edumazet@...gle.com, jeffrey.t.kirsher@...el.com,
	rusty@...tcorp.com.au, dborkman@...hat.com, brouer@...hat.com,
	john.r.fastabend@...el.com
Subject: Re: [PATCH 0/2] Get rid of ndo_xmit_flush

From: Hannes Frederic Sowa <hannes@...essinduktion.org>
Date: Thu, 28 Aug 2014 03:42:54 +0200

> I wonder if we still might need a separate call for tx_flush, e.g. for
> af_packet if one wants to allow user space control of batching, MSG_MORE
> with tx hangcheck (also in case user space has control over it) or
> implement TCP_CORK alike option in af_packet.

I disagree with allowing the user to hold a device TX queue hostage
across system calls, therefore the user should provide the entire
batch in such a case.
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