Sepherosa Ziehau 7ccc20da6a hyperv/hn: Cleanup RXBUF ack processing.
- Increase the # of retries.
- Add comment.
- Log error, if RXBUF ack fails.
- Add stat for RXBUF ack failures.

RXBUF ack really should _not_ fail...

MFC after:	1 week
Sponsored by:	Microsoft
Differential Revision:	https://reviews.freebsd.org/D8368
2016-10-31 04:54:15 +00:00
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