netdev - Re: [PATCH] TX_RING and packet mmap

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Message-ID: <87octymhbt.fsf@basil.nowhere.org>
Date:	Tue, 12 May 2009 18:11:50 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Johann Baudy <johann.baudy@...-log.net>
Cc:	netdev@...r.kernel.org, Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>,
	Patrick McHardy <kaber@...sh.net>, jamal <hadi@...erus.ca>,
	Christoph Lameter <cl@...ux.com>,
	Evgeniy Polyakov <zbr@...emap.net>
Subject: Re: [PATCH] TX_RING and packet mmap

Johann Baudy <johann.baudy@...-log.net> writes:

> From: Johann Baudy <johann.baudy@...-log.net>
>
> New packet socket feature that makes packet socket more efficient for transmission.
> - It reduces number of system call through a PACKET_TX_RING mechanism, based on PACKET_RX_RING (Circular buffer allocated in kernel space which is mmapped from user space).
> - It minimizes CPU copy using fragmented SKB (almost zero copy).

When you add new interfaces like this you should add them to the packet (7)
manpage too.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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