From owner-cvs-all  Mon Oct  9  7:18:12 2000
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From: Poul-Henning Kamp <phk@FreeBSD.org>
Date: Mon, 9 Oct 2000 07:18:08 -0700 (PDT)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/fs/devfs devfs_devs.c devfs_vfsops.c
         devfs_vnops.c
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phk         2000/10/09 07:18:08 PDT

  Modified files:
    sys/fs/devfs         devfs_devs.c devfs_vfsops.c devfs_vnops.c 
  Log:
  Don't hold an extra reference to vnodes.  Devfs vnodes are sufficiently
  cheap to setup that it doesn't really matter that we recycle device
  vnodes at kleenex speed.
  
  Implement first cut try at killing cloned devices when they are
  not needed anymore.  For now only the bpf driver is involved in
  this experiment.  Cloned devices can set the SI_CHEAPCLONE flag
  which allows us to destroy_dev() it when the vcount() drops to zero
  and the vnode is reclaimed.  For now it's a requirement that the
  driver doesn't keep persistent state from close to (re)open.
  
  Some whitespace changes.
  
  Revision  Changes    Path
  1.7       +7 -11     src/sys/fs/devfs/devfs_devs.c
  1.9       +5 -3      src/sys/fs/devfs/devfs_vfsops.c
  1.11      +19 -13    src/sys/fs/devfs/devfs_vnops.c



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