CVS commit: src/sys/kern

["YAMAMOTO Takashi" <yamt%netbsd.org@localhost>]

Module Name:    src
Committed By:   yamt
Date:           Fri Dec 17 22:34:04 UTC 2010

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

Log Message:
- lookup_once: when crossing a mount point, don't keep the parent vnode locked.
  ie. don't lock a vnode while holding another vnode which belongs to a
  different filesystem.  otherwise we propagate slowness (or deadness) of a
  filesystem to another via vnode lock chain.
- lookup_parsepath: don't alter vnode states.  let the caller do it instead.
- add comments and assertions.


To generate a diff of this commit:
cvs rdiff -u -r1.125 -r1.126 src/sys/kern/vfs_lookup.c

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