K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2020-02-01T06:40:35.291854Z
K 7
svn:log
V 323
vfs: save on atomics on the root vnode for absolute lookups

There are 2 back-to-back atomics on the vnode, but we can check upfront if one
is sufficient. Similarly we can handle relative lookups where current working
directory == root directory.

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D23427

END