K 10
svn:author
V 5
shurd
K 8
svn:date
V 27
2017-09-23T16:46:30.982446Z
K 7
svn:log
V 526
Have ifmp_ring_enqueue() abdicate instead of switch to a consumer

Move TX out of the enqueue() path. As a result, we need
to have ifmp_ring_check_drainage() pick up from the abdicate state.

We also need to either enqueue the TX task, or check drainage
after calling ifmp_ring_enqueue() to ensure it's sent.

This change results in a 30% small packet forwarding improvement.

Reviewed by:	olivier, sbruno
Approved by:	sbruno (mentor)
Sponsored by:	Limelight Networks
Differential Revision:	https://reviews.freebsd.org/D12439

END