[src/trunk]: src/doc Add ad-namecache.

[ad <ad%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/bf9595683dbc
branches:  trunk
changeset: 968239:bf9595683dbc
user:      ad <ad%NetBSD.org@localhost>
date:      Wed Jan 08 11:05:39 2020 +0000

description:
Add ad-namecache.

diffstat:

 doc/BRANCHES |  22 +++++++++++++++++++++-
 1 files changed, 21 insertions(+), 1 deletions(-)

diffs (36 lines):

diff -r 2bfffc639256 -r bf9595683dbc doc/BRANCHES
--- a/doc/BRANCHES      Wed Jan 08 09:12:11 2020 +0000
+++ b/doc/BRANCHES      Wed Jan 08 11:05:39 2020 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: BRANCHES,v 1.351 2019/07/30 15:56:53 martin Exp $
+#      $NetBSD: BRANCHES,v 1.352 2020/01/08 11:05:39 ad Exp $
 #
 # This file contains a list of branches that exist in the NetBSD CVS
 # tree and their current state.
@@ -381,6 +381,26 @@
 Scope:         kernel
 Notes:         Ressurect ad-audiomp, make the audio drivers MP safe.
 
+Branch:                ad-namecache
+Description:   Redo the namecache
+Status:                Active
+Start Date:    8 January 2020
+End Date:
+Base Tag:      ad-namecache-base
+Maintainer:    Andrew Doran <ad%NetBSD.org@localhost>
+Scope:         src/sys src/common
+Notes:         1) Redo the namecache to focus on per-directory data
+               structures, removing the huge hashtable and nasty locking
+               scheme.
+
+               Initially this uses rbtrees (because that's what's there). 
+               The intent is that ultimately some other data structure
+               will be used.
+
+               2) Experiment with having namei() traverse the cache and
+               avoid vnode locks except for the leaf in the totally
+               in-cache case.
+
 Branch:                agc-netpgp-standalone
 Description:   Remove dependency on openssl libraries in netpgp
 Status:                Active