From: Johann Baudy <johann.baudy@gnu-log.net>
Date: Tue, 19 May 2009 05:11:22 +0000 (-0700)
Subject: net: TX_RING and packet mmap
X-Git-Tag: v2.6.31-rc1~330^2~369
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1;p=pandora-kernel.git

net: TX_RING and packet mmap

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).

Signed-off-by: Johann Baudy <johann.baudy@gnu-log.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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