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

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Message-Id: <1179355932.4084.19.camel@localhost>
Date:	Wed, 16 May 2007 18:52:12 -0400
From:	jamal <hadi@...erus.ca>
To:	Sridhar Samudrala <sri@...ibm.com>
Cc:	David Miller <davem@...emloft.net>, xma@...ibm.com,
	rdreier@...co.com, ak@...e.de, krkumar2@...ibm.com,
	netdev@...r.kernel.org, netdev-owner@...r.kernel.org,
	ashwin.chaugule@...unite.com,
	Evgeniy Polyakov <johnpol@....mipt.ru>,
	Gagan Arneja <gagan@...are.com>
Subject: Re: [WIP] [PATCH] WAS Re: [RFC] New driver API to speed up small
	packets xmits

On Wed, 2007-16-05 at 15:12 -0700, Sridhar Samudrala wrote:
> Jamal,
> 
> Here are some comments i have on your patch.
> See them inline.
> 

Thanks for taking the time Sridhar.

> try_tx_pkts() is directly calling the device's batch xmit routine.
> Don't we need to call dev_hard_start_xmit() to handle dev_queue_xmit_nit
> and GSO segmentation?
> 

I think this is the core of all your other comments.
Good catch - that piece of code has changed since 2.6.18; so the patch
i posted wont work with GSO.

You actually caught a bug in my other patch as well that nobody else
did;->

I will have to think a bit about this; i may end up coalescing when
grabbing the packets but call the nit from the driver using a helper.

cheers,
jamal

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