cvs commit: src/sys/kern vfs_lookup.c

[Kris Kennaway]

kris        2006-04-30 03:58:12 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_6_1)
    sys/kern             vfs_lookup.c 
  Log:
  MFC r1.90, r1.91:
  
  > - Lock giant when assigning ni_vp and keep vfslocked state valid.
  
  > - Consistently track ni_dvp and ni_vp with dvfslocked and vfslocked rather
  >   than trying to optimize it into a single lock.  This adds more calls to
  >   lock giant with non smpsafe filesystems but is the only way to reliably
  >   hold the correct lock.
  > - Remove an invalid assert in the mountedhere case in lookup and fix the
  >   code to properly deal with the scenario.  We can actually have a lookup
  >   that returns dp == dvp with mountedhere set with certain unmount races.
  
  Approved by:    re (scottl)
  
  Revision      Changes    Path
  1.80.2.6.2.1  +16 -13    src/sys/kern/vfs_lookup.c