K 10
svn:author
V 3
cem
K 8
svn:date
V 27
2020-07-24T17:34:04.813695Z
K 7
svn:log
V 420
Add unlocked/SMR fast path to getblk()

Convert the bufobj tries to an SMR zone/PCTRIE and add a gbincore_unlocked()
API wrapping this functionality.  Use it for a fast path in getblkx(),
falling back to locked lookup if we raced a thread changing the buf's
identity.

Reported by:	Attilio
Reviewed by:	kib, markj
Testing:	pho (in progress)
Sponsored by:	Isilon
Differential Revision:	https://reviews.freebsd.org/D25782

END