git: bge: Improve TX performance on certain low end chips

[Sepherosa Ziehau]

commit c728ae9889b31a4788919f323c05b5fefb504f7b
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Fri Jun 29 15:39:10 2012 +0800

    bge: Improve TX performance on certain low end chips
    
    These chips, e.g. BCM5761, only allow one outstanding DMA read operation,
    so on TX path, mbuf chain should be packed to reduce number of DMA reads
    from chip to improve performance.
    
    hw.bgeX.force_defrag is added for PCI-E chips to enable this mbuf chain
    packing.  It is not enabled by default.
    
    Obtained-from: FreeBSD 200088

Summary of changes:
 sys/dev/netif/bge/if_bge.c    |   39 +++++++++++++++++++++++++++++++++++++++
 sys/dev/netif/bge/if_bgereg.h |    1 +
 2 files changed, 40 insertions(+), 0 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/c728ae9889b31a4788919f323c05b5fefb504f7b


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