netdev - Re: [RFC] New driver API to speed up small packets xmits

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Message-ID: <4643F8B1.5030803@gmail.com>
Date:	Thu, 10 May 2007 22:01:37 -0700
From:	Gagan Arneja <gaagaan@...il.com>
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
Cc:	Gagan Arneja <gaagaan@...il.com>,
	David Miller <davem@...emloft.net>, rick.jones2@...com,
	vladislav.yasevich@...com, ian.mcdonald@...di.co.nz,
	krkumar2@...ibm.com, johnpol@....mipt.ru, netdev@...r.kernel.org
Subject: Re: [RFC] New driver API to speed up small packets xmits

 > If you have braindead slow hardware,
 > there is nothing that says your start_xmit routine can't do its own
 > coalescing.  The cost of calling the transmit routine is the 
responsibility
 > of the driver, not the core network code.

Yes, except you very likely run the risk of the driver introducing 
latency. The problem is prevalent enough that one can argue for a fix (a 
better one at that) higher up. And it's not all that high up that we 
need to get completely paranoid about it.

 > --
 > Stephen Hemminger <shemminger@...ux-foundation.org>
 >

--
Gagan

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