netdev - Re: [Lsf] [LSF/MM TOPIC] Generic page-pool recycle facility?

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Date:	Thu, 7 Apr 2016 19:48:50 +0000
From:	"Waskiewicz, PJ" <PJ.Waskiewicz@...app.com>
To:	"lsf@...ts.linux-foundation.org" <lsf@...ts.linux-foundation.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"brouer@...hat.com" <brouer@...hat.com>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"bblanco@...mgrid.com" <bblanco@...mgrid.com>,
	"alexei.starovoitov@...il.com" <alexei.starovoitov@...il.com>,
	"James.Bottomley@...senPartnership.com" 
	<James.Bottomley@...senPartnership.com>,
	"tom@...bertland.com" <tom@...bertland.com>,
	"lsf-pc@...ts.linux-foundation.org" 
	<lsf-pc@...ts.linux-foundation.org>
Subject: Re: [Lsf] [LSF/MM TOPIC] Generic page-pool recycle facility?

On Thu, 2016-04-07 at 16:17 +0200, Jesper Dangaard Brouer wrote:
> (Topic proposal for MM-summit)
> 
> Network Interface Cards (NIC) drivers, and increasing speeds stress
> the page-allocator (and DMA APIs).  A number of driver specific
> open-coded approaches exists that work-around these bottlenecks in
> the
> page allocator and DMA APIs. E.g. open-coded recycle mechanisms, and
> allocating larger pages and handing-out page "fragments".
> 
> I'm proposing a generic page-pool recycle facility, that can cover
> the
> driver use-cases, increase performance and open up for zero-copy RX.

Is this based on the page recycle stuff from ixgbe that used to be in
the driver?  If so I'd really like to be part of the discussion.

-PJ


-- 
PJ Waskiewicz
Principal Engineer, NetApp
e: pj.waskiewicz@...app.com
d: 503.961.3705