K 10
svn:author
V 5
sephe
K 8
svn:date
V 27
2016-12-01T03:27:16.658000Z
K 7
svn:log
V 254
hyperv/hn: Add HN_DEBUG kernel option.

If bufring is used for per-TX ring descs, don't update "available"
counter, which is only used to help debugging.

MFC after:	1 week
Sponsored by:	Microsoft
Differential Revision:	https://reviews.freebsd.org/D8674

END