CVS commit: src/sys/kern

["Andrew Doran" <ad%netbsd.org@localhost>]

Module Name:    src
Committed By:   ad
Date:           Thu Apr 23 22:58:36 UTC 2020

Modified Files:
        src/sys/kern: vfs_cache.c

Log Message:
cache_lookup_linked(): We can't use the name to decide how to lock the dir,
since the name refers to the child (found object) not the parent (the thing
that's being locked).

Fix it by always doing rw_tryenter().  There's not much to be won by
optimising for the contended case, and were this routine doing lockless
lookups (the eventual goal) it wouldn't be hanging around waiting for
changes either.


To generate a diff of this commit:
cvs rdiff -u -r1.140 -r1.141 src/sys/kern/vfs_cache.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.