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

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Message-Id: <1178883002.4093.26.camel@localhost>
Date:	Fri, 11 May 2007 07:30:02 -0400
From:	jamal <hadi@...erus.ca>
To:	Evgeniy Polyakov <johnpol@....mipt.ru>
Cc:	Krishna Kumar2 <krkumar2@...ibm.com>,
	Ian McDonald <ian.mcdonald@...di.co.nz>,
	netdev@...r.kernel.org, Rick Jones <rick.jones2@...com>,
	Vlad Yasevich <vladislav.yasevich@...com>
Subject: Re: [RFC] New driver API to speed up small packets xmits

On Fri, 2007-11-05 at 13:56 +0400, Evgeniy Polyakov wrote:

> I meant no locks during processing of the packets (pci read/write, dma
> setup and so on), of course it is needed to dequeue a packet, but only
> for that operation.

I dont think you can avoid the lock Evgeniy. You need to protect against
the tx ring having some other things happening to it from the napi poll
or netdev interupts (most of the drivers touch the tx ring on the napi
poll).

cheers,
jamal

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