From: Ron Livne <ronli@voltaire.com>
Date: Tue, 15 Jul 2008 06:48:48 +0000 (-0700)
Subject: IPoIB: Use multicast loopback blocking if available
X-Git-Tag: v2.6.27-rc1~1090^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=12406734051a26e9fe4c8568e931dfddbb72d431;p=pandora-kernel.git

IPoIB: Use multicast loopback blocking if available

Set IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK for IPoIB's UD QPs if
supported by the underlying device.  This creates an improvement of up
to 39% in bandwidth when sending multicast packets with IPoIB, and an
improvment of 12% in cpu usage.

Signed-off-by: Ron Livne <ronli@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
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