cvs commit: src/sys/kern

[Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxxxxx>]

dillon      2004/10/01 00:08:23 PDT

DragonFly src repository

  Modified files:
    sys/kern             vfs_cache.c 
  Log:
  VFS messaging/interfacing work stage 7a/99:  Firm up stage 7 a bit by
  automatically vhold()ing any vnodes associated with a locked namecache
  record.  This will prevent the vnode from being recycled (which would
  unexpectedly cause the namecache entry to revert to an unresolved state
  even while it is locked).
  
  Previously only vnodes associated with namecache records with children
  were being held (in order to guarentee that the vnode associated with the
  parent directory of a locked leaf namecache record would stick around without
  having to lock the parent directory's namecache record).
  
  The point here being that we want to have to only lock and pass a single
  namecache record to definitively identify an object in the namespace,
  rather then the combination of directory and leaf nodes (and other junk)
  that the old API required.  For example, the old RENAME API required 6
  arguments (fdvp, fvp, fcnp, tdvp, tvp, tcnp) while the new one will only
  require two arguments (fncp, tncp).
  
  Revision  Changes    Path
  1.30      +43 -7     src/sys/kern/vfs_cache.c


http://www.dragonflybsd.org/cvsweb/src/sys/kern/vfs_cache.c.diff?r1=1.29&r2=1.30&f=u