K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2020-08-02T20:02:06.025223Z
K 7
svn:log
V 399
vfs: store precomputed namecache hash in the vnode

This significantly speeds up path lookup, Cascade Lake doing access(2) on ufs
on /usr/obj/usr/src/amd64.amd64/sys/GENERIC/vnode_if.c, ops/s:
before: 2535298
after: 2797621

Over +10%.

The reversed order of computation here does not seem to matter for hash
distribution.

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D25921

END