git: ix: Free tx mbufs proactively.

[Sepherosa Ziehau]

commit 82db96e912bf0117f3be1e6c424df1f83bc0bac0
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Sun Oct 22 06:06:27 2017 +0800

    ix: Free tx mbufs proactively.
    
    This is preparation for the dillon's upcoming sendfile patch.

Summary of changes:
 sys/dev/netif/ix/if_ix.c | 176 ++++++++++++++++++++++++++++++++++++++++-------
 sys/dev/netif/ix/if_ix.h |  10 ++-
 2 files changed, 158 insertions(+), 28 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/82db96e912bf0117f3be1e6c424df1f83bc0bac0


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